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Journal articles on the topic 'Potato yield'
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1
Zymaroieva, Anastasiia, Tetiana Fedoniuk, Svitlana Matkovska, Olena Andreieva, and Victor Pazych. "Agroecological Determinants of Potato Spatiotemporal Yield Variation at the Landscape Level in the Central and Northern Ukraine." Grassroots Journal of Natural Resources 4, no. 2 (May 30, 2021): 34–47. http://dx.doi.org/10.33002/nr2581.6853.040203.
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Global food security largely depends on the crop yield increase, so the study of the yield-limiting factors of potato (the second bread) is a pressing issue today. This study determines the contribution of the agroecological factors, namely, bioclimatic variables, soil indicators, and factors of landscape diversity, to the variation in potato yields. Conducted in Polissya and Forest-steppe zones of Ukraine during 1991–2017, this study has not only addressed the relationship between ecological determinants and potato yields, but also considered crop yields as a dynamic system. The dynamics of potato yields from the mid-1990s to the present is described by a log-logistic model. There are statistically significant regression dependencies between potato yield parameters and agroecological factors. Potato yield is dependent on the diversity of landscape cover. The relationship between yield parameters and landscape-ecological diversity is non-linear, which determines the presence of optimal landscape structure for the highest potato yields. Among climatic factors, the continental climate is of the greatest importance for potato yield. The high sensitivity of potato yield parameters to soil indices was found, and mostly the soil texture components (silt content), which largely determines the potato yield spatial variation.
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Kateřina, Pazderů, and Hamouz Karel. "Yield and resistance of potato cultivars with colour flesh to potato late blight." Plant, Soil and Environment 63, No. 7 (July 19, 2017): 328–33. http://dx.doi.org/10.17221/371/2017-pse.
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The resistance to potato late blight (as AUDPC – the area under the disease progress curve) and yield were evaluated in precise field experiments with 13 colour-fleshed potato cultivars. Red Emmalie and Blaue Anneliese were the most profitable cultivars of potatoes with coloured flesh, the overall yield did not differ statistically from the control cv. Agria. Cv. Blaue Anneliese resistance to potato late blight was considerably better than both control cultivars, other 2 cultivars HB Red and Red Emmalie were similar to cv. Agria. Surprisingly, cv. Russet Burbank was found to be more resistant than most cultivars tested. A statistically significant weak dependence (r = 0.36) between the percentage of infestation of plants in the T6 evaluation date (6–8 August in individual years) and the yield was detected, the slightly stronger (r = 0.40) was the correlation between AUDPC values and total yields.
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Li, Qiang, and Suiqi Zhang. "Impacts of Recent Climate Change on Potato Yields at a Provincial Scale in Northwest China." Agronomy 10, no. 3 (March 20, 2020): 426. http://dx.doi.org/10.3390/agronomy10030426.
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Understanding the effects of climate change on potato yield is vital for food security in northwest China. Based on the long-term data of yields and meteorology, this study analysed the impacts of recent climate change on potato yields at a provincial scale in northwest China. The first difference method was used to disentangle the contributions of climate change from the changes in potato yield in two consecutive years. The moving average method was used to decouple the climate-induced yield of potato. The results showed that the yield and planting area of potato from the period 1982 to 2015 increased markedly, with inter-annual fluctuations. The temperature increased significantly during the potato growing period in northwest China, while other climatic factors did not change significantly. Specifically, the changing trends in climatic factors varied among different provinces. The key meteorological factors limiting potato yield were temperature, precipitation and diurnal temperature range, varying in the different provinces. Potato yields in Gansu, Shaanxi, Ningxia and Xinjiang decreased by 127, 289, 199 and 339 kg ha−1, respectively, for every 1 °C increase in daily maximum temperature. The potato yield in Xinjiang decreased by 583 kg ha−1 for every 1 °C increase in daily minimum temperature. For every 100 mm increase in precipitation, the potato yields in Gansu, Qinghai and Ningxia increased by 250, 375 and 182 kg ha−1, respectively. Combining the first difference method and the moving average method, precipitation was the dominant climatic factor affecting potato yield in rain-fed areas (Gansu, Qinghai and Ningxia). For areas with irrigation (Xinjiang) or relatively high rainfall (Shaanxi), maximum temperature was the deciding climatic factor affecting potato yield. Appropriate adaptation to climate change in the different regions will help to ensure potato production in northwest China.
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Hartemink, Alfred E. "Integrated Nutrient Management Research with Sweet Potato in Papua New Guinea." Outlook on Agriculture 32, no. 3 (September 2003): 173–82. http://dx.doi.org/10.5367/000000003101294442.
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This paper summarizes a series of field experiments that investigated the effects of organic and inorganic nutrients on sweet potato tuber yield in the humid lowlands of Papua New Guinea. In the first experiment, plots were planted with Piper aduncum, Gliricidia sepium and Imperata cylindrica, which were slashed after one year, whereafter sweet potato was planted. Sweet potato yield was lowest after Gliricidia fallow, but no yield differences were found after piper and imperata fallow. In the second season, there was no significant difference in sweet potato yields. The second experiment consisted of a factorial fertilizer trial with four levels of N (0, 50, 100, 150 kg ha–1) and two levels of K (0, 50 kg ha–1). Nitrogen fertilizers increased yield in the first season, but depressed tuber yields in the second and third seasons. Potassium fertilizer had no effect on marketable tuber yield. The third experiment consisted of a comparison between N from inorganic fertilizer and poultry litter at four rates (0, 50, 100, 150 kg ha–1). No difference was found between the inorganic fertilizer and poultry litter, and the highest yields were found at 100 kg N ha–1. In the second season no significant response was observed. Although yield variation was considerable, this series of experiments has shown that sweet potato yield can be significantly increased by inorganic or organic N applications. Sweet potato yields after fallows were less variable than after inorganic nutrient inputs. Inputs of inorganic fertilizer or poultry litter may strongly increase or decrease tuber yields.
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Tibiri, E. B., K. Somé, J. S. Pita, F. Tiendrébéogo, M. Bangratz, J. B. Néya, C. Brugidou, and N. Barro. "Effects of sweet potato feathery mottle virus, sweet potato chlorotic stunt virus and their co-infection on sweet potato yield in Western Burkina Faso." Open Agriculture 4, no. 1 (December 31, 2019): 758–66. http://dx.doi.org/10.1515/opag-2019-0076.
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AbstractTo determine the effects of sweet potato feathery mottle virus (SPFMV), Sweet potato chlorotic stunt virus (SPCSV) and their co-infection on sweet potato yield, twelve sweet potato varieties were assessed in a hotspot area in Western Burkina Faso. The experiment was carried out in a randomized complete-block design with the twelve varieties in three replications. Data were collected on plant growth parameters, plant virus symptoms and yield parameters. Additional testing for selected sweet potato viruses was done using a nitrocellulose membrane enzyme-linked immunosorbent assay (NCM-ELISA) and RT-PCR. SPFMV and SPCSV were the viruses detected in this study. Varieties Djakani and Ligri were virus-free and had the highest average yields out of twelve sweet potato varieties assessed. Field monitoring indicated that 58% of plants were found to be virus-infected. The results suggest that severe symptoms were associated with sweet potato virus disease (SPVD) and yield reduction. However, the interaction of SPCSV with other viruses, which may result in synergistic negative effects on sweet potato yield and quality, needs further research.
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Vangessel, Mark J., and Karen A. Renner. "Effect of Soil Type, Hilling Time, and Weed Interference on Potato (Solanum tuberosum) Development and Yield." Weed Technology 4, no. 2 (June 1990): 299–305. http://dx.doi.org/10.1017/s0890037x00025434.
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‘Atlantic’ and ‘Russet Burbank’ potato cultivars were grown on mineral and organic soils either with or without weeds and were hilled at two stages of potato development (potatoes cracking through the soil and potatoes 30 cm tall). A single hilling procedure was not adequate in either year for full-season weed control. Early hilling suppressed weeds and increased tuber yields more than conventional hilling on mineral soils in 1988 only. Early hilling tended to increase the relative biomass of C4weeds compared to C3weeds for both soils. Weeds reduced aboveground potato biomass on mineral and muck soils. However, reduced aboveground potato biomass measurements did not predict tuber yield reductions. Marketable yield of Russet Burbank potato was reduced by weed interference more than the yield of Atlantic on mineral soils when planted according to conventional cultural practices. However, the marketable yield of Atlantic potato was reduced more than Russet Burbank yield by weeds on muck soils. Weed interference influenced tuber quality on both mineral and muck soil.
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Kuhar, Thomas P., Michael P. Hoffmann, Lydia J. Stivers-Young, Susan B. Sterrett, and Michele Marini. "Potato Leafhopper Economic Injury Levels on Earlystage Snap and Dry Kidney Beans." HortTechnology 13, no. 4 (January 2003): 647–49. http://dx.doi.org/10.21273/horttech.13.4.0647.
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Field cage experiments were conducted in Ithaca, N.Y. in 2001 to determine the yield effect of potato leafhopper (Empoasca fabae) infestations on early-stage beans (Phaseolus vulgaris). Yields of `Hystyle' snap beans and `Montcalm' dry kidney beans were significantly reduced when infested by potato leafhopper at the cotyledon, two-leaf, and four-leaf stages. For snap beans, no differences in yield response from potato leafhopper were observed among the three plant growth stages. For dry beans, there was a difference in yield response between cotyledon and four-leaf-stage plants. Dynamic economic injury levels for potato leafhopper on early-stage beans are suggested.
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Sturz, A. V., W. Arsenault, and B. R. Christie. "Red Clover-Potato Cultivar Combinations for Improved Potato Yield." Agronomy Journal 95, no. 5 (September 2003): 1089–92. http://dx.doi.org/10.2134/agronj2003.1089.
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Maletta, Martha, Melvin Henninger, and Kristian Holmstrom. "Potato Leafhopper Control and Plastic Mulch Culture in Organic Potato Production." HortTechnology 16, no. 2 (January 2006): 199–204. http://dx.doi.org/10.21273/horttech.16.2.0199.
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Control tactics for potato leafhopper (Empoasca fabae) in certified organic potato (Solanum tuberosum) production were evaluated in 2003 and 2004. The 2004 split plot trial also compared silver plastic mulch culture with bare ground culture. The trials were conducted at the Rutgers Snyder Research and Extension Farm's certified organic fields, and production practices conformed to the standards of the National Organic Program (NOP). `Superior' potato was grown both years. Potato leafhopper (PLH) controls evaluated were: kaolin, pyrethrin, pyrethrin plus kaolin (2003), pyrethrin with silicon dioxide (2004), and silver plastic mulch (2003). Pyrethrin, pyrethrin plus kaolin, and pyrethrin with silicon dioxide reduced PLH nymph counts and PLH damage (hopperburn) ratings compared with the untreated check (UTC). Kaolin did not reduce nymph counts or hopperburn ratings. In 2003, nymph counts and hopperburn ratings were higher in the mulch treatment than in the UTC, yet the mulch treatment produced higher yield than the UTC. In 2004, mulch culture increased total and marketable yield compared with bare ground culture when PLH was controlled. Nymph counts and hopperburn ratings were higher until mid-July in the mulch plots than bare ground plots with the UTC and kaolin treatments. Controlling PLH and using plastic mulch culture significantly increased organic potato yields and tuber size. Marketable yields from the UTC were less than the New Jersey average of 275 cwt/acre for conventionally grown potato: yield was 38% of average on bare ground and 68% of average on mulch in 2003; 33% of average on bare ground and 38% of average on mulch in 2004. Reducing hopperburn with pyrethrin on plants grown on mulch (2004) resulted in marketable yield that was 75% of the New Jersey average.
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Ajis, Rakhmat Hanafi, and I. Handoko. "HUBUNGAN ANTARA WAKTU TANAM DENGAN HASIL DAN PROFITABILITAS BUDIDAYA KENTANG (Solanum tuberosum l.) DI CIKAJANG, GARUTRELATIONSHIPS BETWEEN PLANTING TIME AND YIELD AS WELL AS PROFITABILITY OF GROWING POTATO ... ." Jurnal Agromet Indonesia 24, no. 1 (June 19, 2010): 9. http://dx.doi.org/10.29244/j.agromet.24.1.9-13.
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Relationships between planting time and yield as well as profitability of growing potato were investigated in Cikajang, Garut, based on water balance analysis and survey to potato farmers of the area. In general, there were three planting dates namely December-January, April-May and August-September. Yield and profitability of growing potato for planting time of August-September was less compared to the other two planting times due to lack of soil-water availability related to less rainfall as well as its high rainfall variability during dry season (coefficient of variation = 133%). Yields of potato for planting times December-January, April-May and August-September were (21.4 + 3.4), (20.5 + 3.5) and (16.9 + 2.2) tonnes/ha, respectively.Relationships between planting time and yield as well as profitability of growing potato were investigated in Cikajang, Garut, based on water balance analysis and survey to potato farmers of the area. In general, there were three planting dates namely December-January, April-May and August-September. Yield and profitability of growing potato for planting time of August-September was less compared to the other two planting times due to lack of soil-water availability related to less rainfall as well as its high rainfall variability during dry season (coefficient of variation = 133%). Yields of potato for planting times December-January, April-May and August-September were (21.4 + 3.4), (20.5 + 3.5) and (16.9 + 2.2) tonnes/ha, respectively.
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Holmstrom, D. A., and M. R. Carter. "Effect of subsoil tillage in the previous crop year on soil loosening and potato yield performance." Canadian Journal of Plant Science 80, no. 1 (January 1, 2000): 161–64. http://dx.doi.org/10.4141/p99-001.
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Soil compaction under potato rotations can be a common problem in Prince Edward Island. This can be further aggravated by naturally occurring compact subsoils. A study was conducted at eight sites on sandy loam soils in three regions of Prince Edward Island to determine whether the recommended practice of subsoiling the fall prior to the potato crop would improve the physical condition of the soil and result in improved yields. The study found that subsoiling provided only a marginal improvement in soil physical conditions. Soil loosening did not increase potato yield or quality. Key words: Potato, subsoiling, yield response, potato quality
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Hamm, P. B., and D. C. Hane. "Effects of Seedborne Potato Leafroll Virus on Russet Norkotah Potato." Plant Disease 83, no. 12 (December 1999): 1122–24. http://dx.doi.org/10.1094/pdis.1999.83.12.1122.
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Tuber yield and quality of cv. Russet Norkotah potato plants grown from seed infected with potato leaf roll virus (PLRV) were compared with tuber yield and quality of adjacent plants grown from virus-free seed. Plants from PLRV-infected seed produced at least 60% less total yield and 88% less marketable yield (tubers >85 g) than plants grown from healthy seed. PLRV-infected seed also produced plants with fewer and smaller tubers than plants grown from healthy seed. No compensatory yield was measured in plants grown from PLRV-free seed growing adjacent to plants from PLRV-infected seed.
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Maletta, Martha, Melvin Henninger, and Kristian Holmstrom. "(414) Evaluation of Potato Leafhopper Control and Plastic Mulch Culture for Organic Potato Production." HortScience 40, no. 4 (July 2005): 1071C—1071. http://dx.doi.org/10.21273/hortsci.40.4.1071c.
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Potato leafhopper (PLH) control and plastic mulch culture for certified organic potato production were evaluated in 2003 and 2004. The trials were conducted on the Rutgers Snyder Research and Extension Farm's certified organic fields. Production practices conformed to the National Organic Program. The potato cultivar grown was `Superior'. In 2003, PLH controls were: untreated control (UTC); Surround WP, 25 lb/acre; PyGanic EC 1.4, 1 pt/acre; Surround plus PyGanic; and silver plastic mulch. PyGanic and Surround/PyGanic treatment reduced PLH nymph counts and damage (hopperburn–HB), when compared to the UTC. Counts were higher and HB more severe in silver mulch plots than in the UTC, but marketable yield was more than double the UTC. PyGanic and Surround/PyGanic treatment yields were 50% higher than the UTC. In 2004, PLH controls were: PyGanic EC 1.4, 1–2 pt/acre; Diatect V, 2–4 lb/acre; and Surround WP, 25 lb/acre. The crop was grown on bare ground or silver plastic mulch. Nymph counts and HB were lowest on PyGanic- and Diatect-treated plots. Nymph counts and HB for UTC and Surround treatment were higher on plastic mulch than bare ground plots. Marketable yield was highest from PyGanic-treated plots. PyGanic or Diatect treatment yields were higher from plastic mulched than from bare ground plots. The PLH control and plastic mulch culture significantly increased organic potato yields. Marketable yield from the UTC was lower than the New Jersey average for conventional potato (275 hundred wt/acre) by 71% on bare ground and by 39% with plastic mulch in 2003; 59% on bare ground; and 52% with plastic mulch in 2004. PLH control with PyGanic combined with plastic mulch culture resulted in yields just 7% less than the state average; yield on bare ground was 26% less.
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Davenport, J. R., C. A. Redulla, M. J. Hattendorf, R. G. Evans, and R. A. Boydston. "Potato Yield Monitoring on Commercial Fields." HortTechnology 12, no. 2 (January 2002): 289–96. http://dx.doi.org/10.21273/horttech.12.2.289.
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An accurate yield map is imperative for successful precision farming. For 3 years (1998 to 2000) two to four potato (Solanum tuberosum) fields on a commercial farm in southeastern Washington were yield-monitored using commercial yield monitoring equipment without operator interaction. Multiple potato diggers were used to harvest the fields and diggers used were not necessarily the same at each harvest. In all years, yield monitoring data were missing due to equipment failure or lack of yield monitoring equipment on all diggers. Banding, due to dissimilar calibrations, different equipment used, or differential digger performance was observed in 1998 and 2000. Based on experience described here, some yield monitor data need minimal postprocessing or correction, other data need substantial postprocessing to make them usable, and other data may not be reliable due to equipment failure, improper calibration, or other causes. Even with preharvest calibration, it is still likely that the potato yield monitor data will need differential postprocessing, indicating that yield maps lack accuracy. In addition, comparison to yield data collected at multiple points within the field, this study found that the yield monitor over estimated potato yield. Thus, with some postprocessing, a useful yield map showing within field differences is possible. However, without significant postprocessing, the practice of using multiple diggers and yield monitors for potato harvest, both within and between fields, severely limits the ability to make consistent yield maps in commercial potato operations.
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Ngeve, J. M., and J. C. Bouwkamp. "Effects of Sweet Potato Virus Disease (SPVD) on the Yield of Sweet Potato Genotypes in Cameroon." Experimental Agriculture 27, no. 2 (April 1991): 221–25. http://dx.doi.org/10.1017/s0014479700018858.
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SummarySweet potato virus disease (SPVD) causes strap-shaped leaves, vein-clearing, puckering, chlorosis and stunting in susceptible sweet potato varieties and yields are much reduced. To investigate the tolerance of genotypes and obtain a better appraisal of yield loss caused by SPVD, eight sweet potato varieties showing symptoms of SPVD were studied for two years in an area where SPVD is severe. Two varieties, although showing symptoms, were tolerant of the disease; their yields were not significantly depressed by SPVD. Among the remaining six varieties, storage root fresh yields were reduced by 56–90% in plants showing SPVD symptoms. Marketable yields, as well as total and marketable numbers of storage roots were similarly depressed by SPVD in the less tolerant varieties. Significant correlations were found between disease severity rating and yield reduction among cultivars.
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Dung, Jeremiah K. S., Jason T. Ingram, Thomas F. Cummings, and Dennis A. Johnson. "Impact of Seed Lot Infection on the Development of Black Dot and Verticillium Wilt of Potato in Washington." Plant Disease 96, no. 8 (August 2012): 1179–84. http://dx.doi.org/10.1094/pdis-01-12-0061-re.
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The fungi Colletotrichum coccodes and Verticillium dahliae are two pathogens of potato which are prevalent in potato field soils and seed tubers. The objective of this study was to investigate the influence of seed lot infection by C. coccodes and V. dahliae on disease severity and yield using infested seed lots and fields with and without potato in their recent cropping histories. Greater incidence of C. coccodes in seed led to more root colonization in 2008 (both field types) but not in 2007 and did not influence tuber quantity or yield. Incidence of infection in seed lots by V. dahliae was not related to canopy necrosis, infection of progeny tubers, or yield. However, seed lots exhibited more V. dahliae aboveground vascular colonization, canopy necrosis, infested plant debris, and infected progeny tubers in 5-year potato rotation fields compared with long potato rotation fields. In general, foliar disease symptoms and yield reductions were not related to levels of either pathogen in seed lots. Symptoms of both diseases were more severe and yields were lower in fields with potato in their recent cropping histories, emphasizing the importance of soilborne inoculum in the development of black dot and Verticillium wilt of potato.
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Baziramakenga, R., and Gilles D. Leroux. "Critical Period of Quackgrass (Elytrigia repens) Removal in Potatoes (Solanum tuberosum)." Weed Science 42, no. 4 (December 1994): 528–33. http://dx.doi.org/10.1017/s004317450007689x.
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Field trials were carried out in 1989 and 1990 at St-Augustin, near Québec City, Canada, to determine the critical periods of quackgrass control in potato submitted to three levels of infestation. Potato yield losses due to quackgrass interference increased with quackgrass infestation and length of duration of interference. Quackgrass interference influenced marketable tuber yields more than total tuber yields. Duration of the critical period varied depending on the level of quackgrass infestation and year. Based on an arbitrary 5% level of marketable yield loss, the critical period started at ca. 15 days after emergence (DAE) of potato at low level of infestation, and at ca. 3 DAE at medium level of infestation. At high level of infestation, the critical period began prior to the emergence of potato. The end of the critical period of quackgrass removal was extremely variable across quackgrass infestation level and year and ranged from 23 to 68 DAE of potato at a 5 % yield loss level. It appears that onset of interference varied less than the end of it, indicating that early quackgrass control is necessary to prevent yield loss.
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Nedunchezhiyan, M., K. Laxminarayana, K. Rajasekhara Rao, and B. Satapathy. "Sweet potato (Ipomoea batatas L.)-based strip intercropping: I. Interspecific interactions and yield advantage." Acta Agronomica Hungarica 59, no. 2 (June 1, 2011): 137–47. http://dx.doi.org/10.1556/aagr.59.2011.2.4.
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A field experiment was conducted at the Regional Centre of the Central Tuber Crops Research Institute, Dumduma, Bhubaneswar for three consecutive years (2006–2008) under rainfed conditions on Alfisols to quantify the effects of strip intercropping on crop yields and yield components. A significantly higher yield was obtained from sweet potato (Ipomoea batatas L.) border rows when pigeonpea (Cajanus cajan (L.) Millsp.) was intercropped. Analyses of sweet potato yield components indicated that the number of roots/plant, root length and root diameter were significantly higher in border rows when rice (Oryza sativa L.), finger millet (Eleusine coracana L.) and pigeonpea were used as intercrop compared to monoculture sweet potato. The number of tubers/plant of sweet potato in border rows was significantly lower when maize (Zea mays L.) was intercropped, but the root length and root diameter were found to increase compared to sole sweet potato. The yields of rice, finger millet, maize and pigeonpea in inside rows in strip cropping were a little higher than in monoculture. The yield difference was mainly due to an increase in the number of seeds/panicle or cob. Sweet potato was the dominant crop when grown with rice or finger millet, but it was the subordinate crop when grown along with maize or pigeonpea. Sweet potato yields were consistently higher in strip intercropping than in monoculture when calculated across all the strips on an equal area basis. A strip intercropping system involving sweet potato + pigeonpea resulted in a higher land equivalent ratio (1.31) and net return ( $623.9) compared to the other forms of intercropping and to monocropping.
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Birhman, R. K., and K. C. Garg. "Yield and yield components of meiotic tetraploids of potato." Potato Research 32, no. 4 (December 1989): 457–62. http://dx.doi.org/10.1007/bf02358501.
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Perron, I., A. N. Cambouris, K. Chokmani, M. F. Vargas Gutierrez, B. J. Zebarth, G. Moreau, A. Biswas, and V. Adamchuk. "Delineating soil management zones using a proximal soil sensing system in two commercial potato fields in New Brunswick, Canada." Canadian Journal of Soil Science 98, no. 4 (December 1, 2018): 724–37. http://dx.doi.org/10.1139/cjss-2018-0063.
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Stagnating potato (Solanum tuberosum L.) yields in eastern Canada have resulted in loss of competitive advantage in global potato markets. Therefore, there is a need to investigate the potential to increase yield by adopting precision agriculture technology. This study evaluated the efficiency of an apparent soil electrical conductivity (ECa) sensor to delineate management zones (MZs) in two commercial potato fields in New Brunswick, Canada, using an unsupervised fuzzy k-means clustering algorithm. Georeferenced soil samples from 0 to 15 cm depth were analyzed for physicochemical properties. Tuber yields were recorded using a yield monitor. The two MZs delineated using soil ECa differed significantly in soil physicochemical properties for both fields; however, tuber yield differed significantly between MZs only in Field 1. The yield difference (7.1 Mg ha−1) in Field 1 was attributed to a difference in soil moisture (23.5% vs 28.5%) resulting from a difference in clay content (141 vs 189 g kg−1). The lack of a yield difference between MZs in Field 2 may reflect relatively low within-field spatial variability. The soil ECa sensor showed promise for use in commercial potato production in New Brunswick, especially in fields with high spatial variability.
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Merga, Bulti, and Nigussie Dechassa. "Variations in Stolon Length and Tuber Roots Among Six Potato Cultivars." Journal of Agricultural Science 11, no. 4 (March 15, 2019): 563. http://dx.doi.org/10.5539/jas.v11n4p563.
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This study is tested whether the stolon length and tuber roots show variations and could affect potato yield among the potato cultivars over two cropping seasons. Six potato cultivars from a group of improved and local cultivars were examined. The results of the experiments done during both seasons revealed that the stolon length and tuber roots showed variations within and among cultivars. Also a relationship between the length of the stolon and yield of tubers was found. The strongest correlations involved from the stolon length and the tuber roots with the increase in tuber yield under the improved cultivars, then the local cultivar with the decrease in yield. These correlations were positive: the higher the value of the parameter, the greater the observed increase in yield with improved cultivars. This showed a relationship between stolon length and tuber roots with the increase of yield; this relationship was stronger for roots in improved cultivars than in the local cultivar. Therefore, this study indicates that improved potato cultivars with deep root systems might improve tuber yields in eastern highlands of Ethiopia.
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IVANY, J. A. "QUACKGRASS COMPETITION EFFECT ON POTATO YIELD." Canadian Journal of Plant Science 66, no. 1 (January 1, 1986): 185–87. http://dx.doi.org/10.4141/cjps86-027.
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The effect of different periods of quackgrass (Agropyron repens L. Beauv.) competition after crop emergence was studied for potato (Solanum tuberosum L. ’Russet Burbank’). Delaying quackgrass removal for 2 wk after crop emergence reduced small-sized tuber yield, marketable tuber yield and total yield by 6%, 27% and 21%, respectively, averaged over 4 yr. Successively longer delays in quackgrass removal showed progressively greater reductions in yield.Key words: Quackgrass, potato, competition
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Zarzecka, Krystyna, Marek Gugała, Anna Sikorska, Kornelia Grzywacz, and Marek Niewęgłowski. "Marketable Yield of Potato and Its Quantitative Parameters after Application of Herbicides and Biostimulants." Agriculture 10, no. 2 (February 22, 2020): 49. http://dx.doi.org/10.3390/agriculture10020049.
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Potato (Solanum tuberosum L.) is grown in over 160 countries. Weed competition and environmental stressors during the vegetative growth stage significantly impact crop yields. An experiment was conducted from 2012 to 2014 in Poland to assess the effect of herbicides linuron + clomazone (L+CH) and metribuzin (M) as well as herbicides mixed with biostimulants (linuron + clomazone and algae extract of Ecklonia maxima—auxins and gibberellins (L+CH+E) and metribuzin + sodium p-nitrophenolate, sodium o-nitrophenolate and sodium 5-nitroguaiacolate (M+S)) on weed infestation, marketable yield and yield components of the following three table potato cultivars: Bartek, Gawin and Honorata. In plots where potato had been treated with herbicides and herbicides mixed with biostimulants, a decline in the fresh matter of weeds was observed, ranging from 72.4% to 96.1%, which was followed by an increase in potato marketable yield (from 27.5% to 61%) and improved parameters of S. tuberosum yield components, compared with the control. Linear correlation coefficients indicated that the following characteristics: marketable yield, weight of tubers per plant and average weight per tuber were associated with weed infestation determined prior to potato harvest.
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Liu, X., S. Li, P. He, P. Zhang, and Y. Duan. "Yield and nutrient gap analysis for potato in northwest China." Journal of Agricultural Science 156, no. 8 (October 2018): 971–79. http://dx.doi.org/10.1017/s0021859618000916.
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AbstractAnalysis of the potato yield gap and the corresponding nutrient gap can help in devising strategies and measurements to increase productivity for closing the gaps through improved practices. On-farm experiments conducted in the main potato production areas of northwest China were used to determine attainable yield. Official statistical data were used to determine the actual on-farm yield. Yield gap was the difference between attainable yield and actual on-farm yield. Nutrient gap was calculated by dividing the size of yield gap by partial factor productivity. Results indicated that nitrogen (N), phosphorus (P) and potassium (K) fertilization increased potato yield by an average of 1169–7625, 2937–5336 and 2331–7338 kg/ha, respectively. The maximum attainable yields (the 90th percentile yields) were 50 145, 37 855, 30 261 and 56 616 kg/ha and the average actual on-farm yield were 14 179, 16 732, 10 271 and 19 990 kg/ha in the Inner Mongolia Autonomous Region (IMAR), Gansu, Ningxia and Qinghai provinces, respectively. In the above four regions, yield would need to increase by 165, 70, 112 and 121% from actual yield to reach 75% of attainable yield. Compared with recent 3-year average NPK rates by farmers, the total NPK rates need to increase by 90.1–134.3% for IMAR, 42.9–69.2% for Gansu, 68.1–111.2% for Ningxia and 48.1–83.8% for Qinghai to improve productivity to near the 75% attainable yield. In conclusion, the high yield responses to fertilizer application provide opportunities to close the large yield gaps through balanced nutrition.
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Verma, R. S., and R. L. Yadav. "Growth and yield of sugarcane and potato in companion cropping system." Journal of Agricultural Science 107, no. 1 (August 1986): 125–31. http://dx.doi.org/10.1017/s0021859600066879.
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SUMMARYTwo potato genotypes, Kufri Sindhuri (KS) and Kufri Chandramukhi (KC), were grown in association with sugarcane (cv. Co 1148) at 1:1 (SP) and 1:2 (SPP) sugarcane (S): potato (P)row arrangements. Growth behaviour and yield of both crops in companionship were compared with those of their sole cropping. Initially, KC accumulated more dry matter in tubers than KS. At harvest, the contribution of tubers to total dry matter was the same in both genotypes. However, KS produced significantly higher absolute tuber yields than KC. Potato row arrangements in sugarcane did not significantly affect the proportion of dry matter in different plant components. However, SPP gave significantly higher tuber yields than SP and was the same as with sole potatoes. Drymatter accumulation, canopy development and yield of sugarcane were not affected significantly by potato row arrangements in the companion cropping system. Sugarcane was unaffected by KC in companion cropping but KS exerted an adverse effect on all the growth characters and yield of sugarcane. Similarly, in sequential cropping, sugarcane yielded significantly less when planted after KS than after KC.
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Yadavi, A., M. Asadi, and E. Maghsoudi. "Effects of Density and Relative Time of Pigweed (Amaranthus retroflexus) Emergence on Yield of Potato (Solanum tuberosum)." Cercetari Agronomice in Moldova 49, no. 2 (June 1, 2016): 115–22. http://dx.doi.org/10.1515/cerce-2016-0020.
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AbstractFor create of food security is essential increasing of efficiency and more productivity strategic products such as potato. In order to investigate the effects of density and relative time of pigweed emergence on potato, a factorial field experiment was conducted during 2014 based on randomized complete block design with three replications at the Research Station of Borojen, Chaharmahal and Bakhtiari, Iran. Treatments were combination of three different pigweed densities (5, 10 and 15 plants/m2) and relative time of pigweed emergence (4 and 8 days before potato, emerged with potato, 4 days after potato emergence). Results indicated that the effects of density and relative time of emergence of pigweed was significant on number of branches per plant, plant height, number of tubers per square meter, biological yield and tuber yield of potato. Also, the interaction of between experimental factors was significant on the biological yield and tuber yield of potato. The earlier emergence and pigweed density led to reduce number of branches per node,biological yield and tuber yield and increase plant height of potato. The presence of weeds caused reduce the size and number of potato tubers. Procedure of decreasing biological yield and tuber yield potato was different with density increasing of pigweed in various relative time of emergence treatment. The highest (39.8 t ha-1) and the least (18.4 t ha-1) tuber yield were related to density of five plants/m2and emergence at 4 days after potato and density of 15 plants/m2and emergence at 8 days before potato treatments, respectively.
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Ćota, Josip, and Azra Hadžić. "Yield and Quality of Potato Varieties." АГРОЗНАЊЕ 14, no. 1 (November 15, 2013): 41. http://dx.doi.org/10.7251/agren1301041c.
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A two-year experiment (2009-2010) included four potato varieties (Desire, Romano, Bistra and Kis Sora). Experiments were conducted in Butmir (about 500 m/ asl) and Glamoč (approximately 900 m/ asl) region. The aim was to select new varieties for our area of cultivation. Productive characteristics of potato varieties (yield, weight and number of tubers per box) were examined. In the frame of qualitative properties, dry matter content and starch were examined. Trials were performed by randomised block design with four replications, and the results were analysed using the analysis of variance. Higher average yield was achieved by Romano cultivar by 8% compared to Desire and Kis Sora. Dry matter content ranged from 21.80% in Romano to 22.20% in Desiree. Examining varieties should be continued in the upcoming period in order to determine the most favourable conditions for cultivation in the area of Bosnia and Herzegovina.
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Po, Edgar A., Sieglinde S. Snapp, and Alexandra Kravchenko. "Potato Yield Variability across the Landscape." Agronomy Journal 102, no. 3 (May 2010): 885–94. http://dx.doi.org/10.2134/agronj2009.0424.
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Carter, M. R., J. B. Sanderson, and R. D. Peters. "Long-term conservation tillage in potato rotations in Atlantic Canada: Potato productivity, tuber quality and nutrient content." Canadian Journal of Plant Science 89, no. 2 (March 1, 2009): 273–80. http://dx.doi.org/10.4141/cjps08073.
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Conservation tillage in combination with mulches in potato (Solanum tuberosum L.) farming systems can maintain crop productivity and improve soil properties, in comparison with conventional tillage systems. However, information is needed on the long-term influence of such practices on potato crop parameters. A study was initiated in 1994 on a Charlottetown fine sandy loam (Orthic Podzol) in Prince Edward Island to assess the feasibility of using conservation tillage practices in combination with crop residue mulches (after the potato harvest) on potato production in two different potato rotations: a 2-yr barley-potato rotation and a clover-based 3-yr (barley-red clover -potato) rotation. In the conservation tillage system, the primary tillage event was moved from the autumn to spring and the degree and depth of tillage were reduced by replacing the conventional mouldboard plough (20 cm depth) with a shallow (15 cm depth) one-pass chisel plough just prior to potato planting. Potato yield and tuber quality, surface residue levels after potato planting, and tuber mineral content were evaluated from 2000 to 2007. Adoption of conservation tillage over the long-term did not adversely influence total or marketable potato yield, or tuber quality. The clover-based 3-yr rotation, compared with the 2-yr rotation, had little effect on total potato yield (42 vs. 44 Mg ha-1), but produced significantly higher marketable tuber yields (38 vs. 32 Mg ha-1), for four of the eight yrs of the study. The conservation tillage system, for both rotations, provided relatively high surface residue levels (>30%) after potato planting, compared with the bare soil surface in the conventional tillage system. Nutrient and trace element contents in tuber dry matter were similar between conservation and conventional tillage. Tuber uptake of nitrogen and other nutrients were slightly greater under the 3-yr, compared with the 2-yr rotation, and associated with tuber dry-matter yield differences. The results of the 14-yr study confirm the conclusions of previous short-term studies that a reduction in depth and intensity of tillage for potato culture is yield neutral, and a viable alternative to conventional tillage systems for potato production on sandy loams in eastern Canada. Key words: Conservation tillage, potato, crop rotation, fine sandy loam, crop yield, surface residue, eastern Canada
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Ngeve, J. M. "Yield stability and yield depression in sweet potato cultivars susceptible to the sweet potato virus disease." Journal of Horticultural Science 65, no. 2 (January 1990): 225–30. http://dx.doi.org/10.1080/00221589.1990.11516051.
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Wang, Ning, Yingying Xing, and Xiukang Wang. "Exploring Options for Improving Potato Productivity through Reducing Crop Yield Gap in Loess Plateau of China Based on Grey Correlation Analysis." Sustainability 11, no. 20 (October 12, 2019): 5621. http://dx.doi.org/10.3390/su11205621.
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Differences in crop yield between different fields in the same region have existed for a long time. Methods for improving the productivity of low-yield fields are a hot topic in large-scale agriculture. This experiment was carried out in potato planting farmland and at a potato experimental station in the Loess Plateau in China to study the effects of soil moisture and soil nutrients on potato yield potential and yield gap. The relationships between potato yield and soil nutrient factors were analyzed using the grey correlation method. The grey correlation method is a new technique for performing prediction, relational analysis and decision-making in many areas. The results indicate that (1) the high-yield group at the potato experimental station (HE) was 72,678 kg/ha; the mean-yield group at the potato experimental station (ME) was 36,083 kg/ha; the high-yield group in the potato planting farmland (HF) was 34,259 kg/ha; and the mean-yield group in the potato planting farmland (MF) was 19,386 kg/ha. (2) The yield gap (YG1) between HF and MF was 14,873 kg/ha; the yield gap (YG2) between ME and the MF was 16,697 kg/ha; the yield gap (YG3) between HE and the MF was 53291 kg/ha. (3) The effects of soil moisture and nutrients on potato yield were ranked from large to small: soil available potassium content > soil nitrate nitrogen content > soil organic matter content > soil water content > soil available phosphorus content. The results of correlation analysis and grey correlation analysis showed that the available potassium had the strongest correlation with potato tuber yield. (4) The content of nitrate nitrogen was significantly correlated with the content of available potassium and available phosphorus, while the water content was significantly correlated with the content of organic matter. According to the influence of soil moisture and nutrients on the potato tuber yield, it is suggested that integrated water and fertilizer cultivation measures be implemented, and the input of potash fertilizer and nitrogen fertilizer be increased.
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Bisognin, Dilson Antônio, Lindolfo Storck, Liege C. da Costa, and Maurício G. Bandinelli. "Plot size variation to quantify yield of potato clones." Horticultura Brasileira 24, no. 4 (December 2006): 485–88. http://dx.doi.org/10.1590/s0102-05362006000400018.
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The objective of this paper was to study plot size variation among potato clones to increase experimental precision of yield performance trials. The experiment was carried out at the experimental area of the Horticulture Dept., UFSM, Santa Maria, Rio Grande do Sul State, Brazil. Tubers of five potato clones were planted in two rows of 60 hills in August 2004. For all ten experimental rows, combined plots were formed adding a different number of adjacent hills of the same row. Soil heterogeneity index and optimum plot size were estimated for each row. Real differences between treatment means for each clone and all clones were estimated using the Hatheway technique. The experimental precision of potato yield trials varied with the evaluated clone because of different optimum plot sizes. Eight-hill plots are the optimum size to quantify yield of potato clones, but experimental precision depends upon adjustments of the number of treatments and replications to the availability of experimental area. Genetic diversity indeed decreases experimental precision and justifies the use of different plot sizes. Practical applicattions and strategies to increase experimental precision of yields performance trials of potato clones are discussed.
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Zaiter, H. Z. "657 PB 063 IRON DEFICIENCY IN POTATO IN THE MEDITERRANEAN REGION AND ITS CONTROL THROUGH RESISTANT GENOTYPES AND NUTRIENT APPLICATION." HortScience 29, no. 5 (May 1994): 527a—527. http://dx.doi.org/10.21273/hortsci.29.5.527a.
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Iron-deficiency symptoms are observed on some genotypes of potato (Solanum tuberosum L.) grown on high-pH and calcareous soils. seven potato cultivars differing in response to iron deficiency chlorosis (FeDC) were grown on high-pH (8.1), calcareous (38% calcium carbonate equivalent in surface 20 cm) and silty clay soil in the field (Beka'a Valley, Lebanon), to determine the effects of FeDC on tuber yield of cultivars sprayed with Fe. A significant interactions between cultivars and Fe spray treatment were noted for visual FeDC ratings and tuber yield. Even though only slight FeDC was noted on some cultivars receiving no Fe spray, tuber yields were significantly increased when sprayed with Fe. Some cultivars with moderate FeDC ratings did not show a significant increase in yield when sprayed with Fe while other cultivars did. Sprayed cultivars generally produced higher tube; yields than unsprayed ones. Indicating that Fe-deficiency chlorosis in the Mediterranean region may be a serious limitation to potato tuber yield.
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Rabinovich, Galina, Dar'ya Tihomirova, and Valentina Lapushkina. "Factors that ensured the formation of potato yields when cultivated on ridges." Agrarian Bulletin of the 198, no. 7 (July 31, 2020): 12–22. http://dx.doi.org/10.32417/1997-4868-2020-198-7-12-22.
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Abstract. The purpose of a comprehensive study carried out at All-Russian Research Institute of Reclaimed Lands in 2016–2018 was to assess meteorological, agro- and biochemical factors that could affect the formation of potato yields. Research methodology and methods. The methodological basis of the study was the experience operating in the system of crop rotation, in which potatoes were cultivated on ridges under various patterns of fertilizer application. The object of research was table potatoes – the mid-early variety Gala. Sod-podzolic light loamy gleyous soil was characterized by pHKCl 4,2–5,3, high content of mobile phosphorus and potassium compounds, and also humus content 2.2–2.5 %. Organic potato fertilizer multi-purpose compost and mineral fertilizers (ammonium nitrate, double superphosphate and potassium chloride) were introduced under the potato either together or separately – with tape or scattered. As factors capable of influencing the formation of the crop yield during each of the growing seasons, we used the determination of nutrient content in the soil, moisture level, activity of enzymes of the oxidoreductase class – catalase and dehydrogenase. In parallel, meteorological observations were carried out. Results. The level of increase in potato yield in fertilized variants relative to the control variant (without fertilizers) for the three-year study period averaged 31 %. The highest yield was observed in the variants with the planned yield of 45 t/ha with the combined use of multi-purpose compost and mineral fertilizers regardless of the method of their application: scatter or ribbon in the ridge, respectively. The highest potato yields were obtained in 2017 favorable for agroclimatic conditions. Statistical processing revealed high levels of correlation of productivity with the content of mineral nitrogen in the soil, with its redox coefficient and moisture. Scientific novelty. Potato yield depends on meteorological, agro- and biochemical factors. To obtain high potato yields in the Non-Chernozem zone, the balanced introduction of nutrients taking into account their content in the soil, weather conditions, and the activity of redox processes is of decisive importance.
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Šťastná, Milada, Petra Oppeltová, and Jana Dufková. "Validation of potato simulation model." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 56, no. 2 (2008): 217–26. http://dx.doi.org/10.11118/actaun200856020217.
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Aim of the study focused on evaluation of SUBSTOR – Potato model and its utilization in potato grows management in the Czech Republic. The experimental field used for the model evaluation was located in Žabčice – South Moravia region with altitudes of 179 meters above the sea level. Tuber yield served as reference for the model evaluation. Nine years experimental data set (1994–2002) was used for the model validation. Rosara cultivar represented very early growing potato, Karin cultivar depicted early growing potato (Solanum tuberosum L.) in the experiment. Comparison between observed and simulated tuber yields presented the evaluation process of SUBSTOR – Potato model. Tuber yields simulated by the model showed excellent accuracy (R2 = 0.97) for Rosara cultivar, but only for four of tested years (1997, 1998, 1999 and 2002). Karin cultivar matched lower value (R2 = 0.43). The model tended to underestimate the tuber yield for non seasonable conditions (i.e. dry years – low amount of precipitation and its disordered distribution during the growing season or higher mean air temperature) and showed the sensitivity to selected cultivars. Study proved SUBSTOR – Potato model as suitable for utilization in potato management; however, potential differences might be expected while using the model under extreme weather conditions.
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Adjesiwor, Albert T., Joel Felix, and Don W. Morishita. "Volunteer potato interference and removal timing in sugar beet." Weed Technology 35, no. 4 (February 19, 2021): 669–73. http://dx.doi.org/10.1017/wet.2021.13.
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AbstractField studies were conducted from 2005 to 2009 in Idaho and Oregon to 1) evaluate the competitive effect of volunteer potato on sugar beet yield (volunteer potato competition experiment), and 2) determine the optimum timing of volunteer potato removal from glyphosate-tolerant sugar beet fields using glyphosate (volunteer potato removal timing experiment). The volunteer potato competition experiment consisted of eight potato densities, including the untreated check: 0, 6,741, 10,092, 13,455, 16,818, 20,184, 26,910, and 40,365 tubers ha−1. The volunteer potato removal experiment consisted of 10 removal timings (including the untreated check) ranging from the 10-cm rosette stage to mid-tuber bulking. There was a linear decrease in sugar beet root and sucrose yield as volunteer potato density increased (P < 0.001) such that with every volunteer potato tuber per square meter, sugar beet root yield decreased by 15% and sucrose yield decreased by 14%. At the highest volunteer potato density (40,365 tubers ha−1), sugar beet root yield was 29,600 kg ha−1 (compared to 73,600 kg ha−1 for the untreated), representing a 60% reduction in sugar beet root yield. In the removal timing study, a one-time application of glyphosate at the 10-cm rosette, hooking, and tuber initiation stages provided 74% to 98% reduction in volunteer potato tuber biomass. Delaying volunteer potato removal beyond the tuber initiation stage reduced sugar beet root and sucrose yield (12% to 20%), resulting in an economic loss of $104 to $161 per hectare. The best potato removal timing that optimizes the trade-off between improved control and potential for sugar beet yield reductions is before or at the tuber initiation stage.
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Byarugaba, Arinaitwe Abel, Settumba B. Mukasa, Alex Barekye, and Patrick R. Rubaihayo. "Interactive effects of Potato virus Y and Potato leafroll virus infection on potato yields in Uganda." Open Agriculture 5, no. 1 (November 5, 2020): 726–39. http://dx.doi.org/10.1515/opag-2020-0073.
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AbstractPotatoes are prone to attack by multiple viruses, which contribute greatly to yield and quality decline depending on the cultivar and the virus involved. This study investigated the effect of co-infection involving Potato virus Y (potyvirus) and Potato leafroll Virus (pelero virus) on productivity of five potato cultivars in Uganda and the nature of virus interaction during co-infection process. Variety response to virus infection by PVY, PLRV and co-infection (PVY + PLRV) varied across different varieties. The plants that were infected with PLRV had leaf rolling, stuntedness, leaf distortion, reduction in leaf size and mottling and light yellow mosaics, and in some cases, purple or red margins were observed, while single infection of PVY induced necrosis, leaf rugosity, crinkling, stunting, interveinal necrosis, blotching of the margins, leaf distortion and mottling. When the two viruses were combined during co-infection with PVY + PLRV, the symptoms were characterized by bright blotching and necrotic leaf margins with purpling of the leaf tips and leaf margins, stuntedness and leaf distortions. The virus disease severity was higher under mixed infected plants than single infected plants. The high disease severity culminated in a significant effect on yield, marketable tuber number per plant, plant growth height and plant vigor, which were different across the varieties. Co-infection involving PVY and PLRV caused a reduction in the marketable yield of 95.2% (Kinigi), 94% (Victoria), 89.5 (Rwagume), 45.3% (Royal) and 23.7% (Sifra). Single infection by PLRV caused a reduction in a marketable yield in Victoria (91.8%), Kinigi (84.8%), Rwagume (73.3%), Royal (47.2%) and Sifra 22.1%, while PVY caused a marketable yield reduction in Victoria (87.2%), Rwagume (85.9.7%), Kinigi (85.1%), Royal (37.4%) and Sifra (14.1%). The effects associated with the co-infection of PVY and PLRV were lower than the combined value of the single infections, suggesting that the two viruses were interacting to affect the potato productivity. The high yield loss suggested that effective resistance strategy targeting PVY, PLRV and their combination was required to save the potato industry in Uganda.
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Khan, ASM Mahabubur Rahman, Md Mazharul Anwar, Salma Akter, Md Zulfikar Haider Prodhan, and Mohammad H. Modal. "Identification Of Factors Influencing Yield Gaps In Mustard, Potato And Rice In Some Selected Areas Of Bangladesh And Strategies To Minimize The Gaps." Bangladesh Journal of Agricultural Research 38, no. 2 (July 28, 2013): 227–40. http://dx.doi.org/10.3329/bjar.v38i2.15886.
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On-farm trials funded by Krishi Gobeshona Foundation (KGF) were conducted at Shibganj(Bogra), Mithapukur (Rangpur), and Ulipur(Kurigram) upazilas to determine and minimize yield gaps in mustard, potato, boro, and T.Aman rice of Mustard/Potato-Boro-T.Aman rice cropping pattern during 2011-12. To conduct the trials, one bigha (1200 sq.m) land was divided into two- where trial plots received the recommended technology and farmers plots (control) traditional technology. The trials were carried out with mustard, boro, and T.Aman rice at Shibganj and potato, boro, and T.Aman at both Mithapukur, and Ulipur locations. Fertilizers were applied according to BARC Fertilizer Guide, 2005 and plant protection measures taken following IPM techniques in trial plots. Traditional practices were followed in farmers plots. Data on yield and yield components were taken and analyzed statistically using paired t-test. Gross return and gross margin were calculated based on production & variable costs and prevailing market price of the produces. The yield of mustard in trial plots was 49.7% (yield gap) higher than that in farmers plots. The yields of potato in trial plots were 37.66% and 33.96% (yield gap) higher over farmers plots at Mithapukur and Ulipur sites, respectively. Likewise, yields of boro rice at Shibganj, Mithapukur and Ulipur in trial plots were 16.67%, 22.03%, and 17.61% (yield gap) higher compared to those of farmers plots. At all three locations, yields of T.Aman in trial plots were also 17.37%, 21%, and 23% (yield gap) higher over farmers plots. In addition, gross return, gross margin, and BCR in trial plots were found higher than those of farmers plots. Results revealed that yield gaps varying from 16.67% to 49.7% exist in boro, T.Aman rice, potato and mustard. The gaps could be attributed to difference in the use of variety and management practices in fertilizers and pests between trial and farmers plots. The yield gaps might be minimized by using HYVs of crops and improved management practices, especially in fertilizers and pests at field level. It is, therefore, necessary to explore the scope to increase the yields of the crops by minimizing yield gaps using improved technologies. The support of extension agencies through demonstrations, field visits and monitoring is essential to minimize the yield gaps. Bangladesh J. Agril. Res. 38(2): 227-240, June 2013 DOI: http://dx.doi.org/10.3329/bjar.v38i2.15886
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Colquhoun, Jed B., Christopher M. Konieczka, and Richard A. Rittmeyer. "Ability of Potato Cultivars to Tolerate and Suppress Weeds." Weed Technology 23, no. 2 (June 2009): 287–91. http://dx.doi.org/10.1614/wt-08-062.1.
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Potato producers rely heavily on herbicides for the majority of weed control. However, recent occurrences of herbicide-resistant weed populations and the lack of new herbicide registrations have stimulated interest in alternative strategies. The choice of potato cultivars that can suppress or tolerate weed competition could be a component of an integrated weed management system to reduce reliance on herbicides. The competitive ability of 10 potato cultivars—‘Atlantic’, ‘Bannock Russet’, ‘Dark Red Norland’, ‘Goldrush’, ‘Rodeo’, ‘Russet Burbank’, ‘Russet Norkotah’, ‘Snowden’, ‘Superior’, and ‘Villetta Rose’—was evaluated in 2006 and 2007 in Hancock, WI. Weed competition treatments included (1) weedy throughout the season, (2) weed-free from emergence to 4 wk after emergence (WAE) by hand-weeding, and (3) weed-free by hand-weeding for the entire season. Potato cultivars did not differ in ability to reduce weed biomass. Early-season time of potato emergence and canopy closure, as well as weed competition treatments, were strongly related to potato tuber yield. In general, Bannock Russet yield relative to weed-free controls of the same cultivar was less than that of most other cultivars. Overall, Atlantic, Russet Burbank, Snowden, and Superior yields (relative to weed-free control yields) usually were greater than the yields of other cultivars under weedy conditions. Although the ability to suppress weeds was similar among cultivars, differences in yield among cultivars grown in the presence of weeds suggest differential tolerances of weed competition.
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Mostofa, M., TS Roy, and R. Chakraborty. "Yield and Yield Contributing Attributes Of Potato as Influenced by Vermicompost And Seed Tuber Size." SAARC Journal of Agriculture 19, no. 1 (July 11, 2021): 71–79. http://dx.doi.org/10.3329/sja.v19i1.54779.
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Low yield is crucial bottleneck for potato production in Bangladesh. The application of vermicompost may enhance the yield of potato. The experiment was consisted of two factors, i.e., Factor A: - Vermicompost level (Vm1-4): Vm1: 0 t ha-1, Vm2: 3 t ha-1, Vm3: 6 t ha-1 and Vm4: 9 t ha-1; Factor B:- Tuber size (T1-5): T1: 5-10 g, T2: 10-20 g, T3: 20-30 g, T4: 30-40 g and T5: > 40 g. The experiment was conducted in a split-plot design with three replications. Vermicompost had significant effect on most of the yield contributing parameters investigated under present study. Results revealed that yield parameters increased with increasing vermicompost level irrespective of tuber size. Among the twenty (20) treatment combinations, vermicompost at the rate of 9 t ha-1 with tuber size > 40 g produced the maximum yield (31.33 t ha-1) that was 53.53 % higher than that of control with 3273.01 $ of monetary advantage. Therefore, present study suggests that potato growers may use vermicompost for increasing yield of potato in Bangladesh. SAARC J. Agric., 19(1): 71-79 (2021)
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Shayanmehr, Samira, Shida Rastegari Henneberry, Mahmood Sabouhi Sabouni, and Naser Shahnoushi Foroushani. "Climate Change and Sustainability of Crop Yield in Dry Regions Food Insecurity." Sustainability 12, no. 23 (November 26, 2020): 9890. http://dx.doi.org/10.3390/su12239890.
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The main purpose of the study was to investigate the effects of climatic change on potato yield and yield variability in Agro-Ecological Zones (AEZs) of Iran during 2041–2070 (2050s). The Statistical Downscaling Model (SDSM) was performed in this study to downscale the outputs of the General Circulation Model (GCM) and to obtain local climate projections under climate scenarios for a future period. The Just and Pope Production function was used to investigate the impacts of climatic change on potato yield. The results showed that the effects of future climatic change on potato yield and its variability would vary among the different AEZs. Potato yield would change in the range from −11% to 36% across different AEZs during the 2050s. Yield variability is expected to vary from −29% to 6%. Much more generally, the results indicated that the major potato producing zones would experience a decrease in mean potato yield in the presence of climate change. Our findings would help policymakers and planners in designing appropriate policies to allocate the lands under potato cultivation among different zones. These results also have important implications for adopting ecological zone-specific strategies to mitigate the reduction in potato yield and meet food security.
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Bani-Hani, Nabeel Mohammad, Jalal “Ahmed Said” Al-Tabbal, Moawiya Ahmad Haddad, Hammad Khalifeh Aldal’in, Ahmad H. Al-Fraihat, Hussein Hussein Alhrout, Hazem Sharef Hasan, and Fawzi M. Aldabbas. "Effect of Plant Density on the Water Use Efficiency and Quality of Potato (Solanum tuberosum L. Cv. Spunta) in the Jordan Valley." Journal of Agricultural Science 10, no. 12 (November 15, 2018): 203. http://dx.doi.org/10.5539/jas.v10n12p203.
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Plant density affected yield, quality and water use efficiency. Little information describing plant density to optimize yield and quality of potato production is available in the Jordan Valley. This study was aimed to investigate the effects of plant density on the yield and yield components of the potato (Solanum tuberosum L.) cultivar “Spunta” grown in the middle of the Jordan Valley. Five different densities of plants (41,600 plants ha-1 (D1), 56,000 plants ha-1 (D2), 83,200 plants ha-1 (D3), 28,000 plants ha-1 (D4), and 41,600 plants ha-1 (D5) were randomly distributed over five replicate sites during the growing season from November 2013 to March 2014. Plant height, number of branches, fresh and dry weight of potato plants, tuber number, tuber weight, total yield, specific gravity and water use efficiency of potato plant grown under different plant density were measured. It was found that the productivity of potato increased with increasing plant density, with the highest total, marketable, and non-marketable yields being obtained at densities of 83,200 seeds ha-1, and the lowest occurring at 41,600 seeds ha-1, which equated to total fresh yields of 45.1 and 25.3 tons ha-1, respectively. The highest water use efficiency for marketable yield (11.9 kg m-3) was obtained at a density of 83,200 seeds ha-1, whereas the lowest water use efficiency (7.5 kg m-3) was obtained at a density of 41,600 seeds ha-1. The specific gravity ranged from 1.04 to 1.08 and the average tuber weight ranged from 77.02 g at a density of 83,200 seeds ha-1 to 115.84 g at a density of 28,000 seeds ha-1.
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Essah, Samuel Y. C., Jorge A. Delgado, Merlin Dillon, and Richard Sparks. "Cover Crops Can Improve Potato Tuber Yield and Quality." HortTechnology 22, no. 2 (April 2012): 185–90. http://dx.doi.org/10.21273/horttech.22.2.185.
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There is the need to develop potato (Solanum tuberosum) cropping systems with higher yields and crop quality. Field studies were conducted with cover crops grown under limited irrigation (<8 inches) to assess the effects of certain types of cover crops on potato tuber yield and quality. On a commercial farm operation before the 2006 and 2007 potato season, mustard (Brassica sp.), canola (Brassica napus), and two cultivars of sorghum-sudangrass (Sorghum bicolor × S. sudanense) were planted. A wet fallow ground treatment where no cover crop was planted was used as a control. Before the 2008 season, barley (Hordeum vulgare), barley plus applied compost, sunflower (Helianthus annus), pea (Pisum sativum), and annual ryegrass (Lolium multiflorum) cover crops were added. The results of these 2006–08 studies showed that cover crops have the potential to increase potato tuber yield and quality, as measured by tuber size (larger tubers) and appearance (e.g., tubers with reduced defects such as cracks, knobs, and misshapes). In 2 of the 3 years, most of the cover crops, especially sorghum-sudangrass, increased yields and tuber quality. Positive results from sorghum-sudangrass suggest there is potential to harvest hay from cover crops and still obtain tuber benefits.
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Jabłońska-Ceglarek, R., and W. Wadas. "Effect of nonwoven polypropylene covers on early tuber yield of potato crops." Plant, Soil and Environment 51, No. 5 (November 19, 2011): 226–31. http://dx.doi.org/10.17221/3578-pse.
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In this six-year research study the effect of nonwoven polypropylene covering on the quantity and quality of early potato yield was estimated. The use of nonwoven polypropylene covers resulted in an increase in the tuber yield and smaller yield variability in the various years, when compared with the traditional cultivation, especially at a very early date of potato harvest. In the cultivation with nonwoven polypropylene covering, the marketable tuber yield 60 days after planting was higher by 23.34% on average and 75 days after planting by 10.92% in the six-year period of the study, compared with the cultivation with no plant covering. The higher profitable effect of covering was obtained in the years with cold spring. The cultivation method of the potato did not affect the chemical composition of the tubers harvested after 60 days from planting. After 75 days from planting the tubers of potato cultivated under nonwoven polypropylene covers contained, on average, more dry matter and starch by 0.81% and 0.85%, respectively.
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Johnson, Dennis A., and Thomas F. Cummings. "Effect of Powdery Scab Root Galls on Yield of Potato." Plant Disease 99, no. 10 (October 2015): 1396–403. http://dx.doi.org/10.1094/pdis-11-14-1170-re.
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Powdery scab of potato, caused by Spongospora subterranea f. sp. subterranea, has increased in incidence since 1981 to become a major concern for potato production in the Columbia Basin of south-central Washington and north-central Oregon. Disease symptoms consist of pustules on the tuber surface and wart-like galls on roots, stolons, and tubers. In the current study, the effect of powdery scab root galls on potato yield was quantified by comparing yields of cultivars susceptible and resistant to root galling grown on soil naturally infested and noninfested with the powdery scab pathogen. Potato tuber yields for the three yield components of yield per plant, number of tubers, and weight of tubers were not negatively affected by powdery scab galls on roots of Umatilla Russet and Shepody, as indicated by yield ratios ≥1.0 in 3 of 4 years, and also by regression analyses in all 3 years. Regression lines with a nonsignificant slope or slopes that significantly increased with gall index also indicated that root galls did not negatively affect yield. Mean tuber weight increased as gall index increased for Umatilla Russet in 2 of 3 years. Consequently, control tactics directed solely at reducing powdery scab galls on roots are not justified economically under conditions encountered in the Columbia Basin of Washington and Oregon states. Effort has been made to develop resistant cultivars and search for soil applied chemicals to reduce root galls.
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Adekiya, A. O., C. M. Aboyeji, T. M. Agbede, O. Dunsin, and O. T. V. Adebiyi. "Effect of ZnSO4 fertilizer on soil chemical properties, performance and proximate quality of sweet potato in a derived savanna ecology of Nigeria." Open Agriculture 3, no. 1 (December 1, 2018): 644–51. http://dx.doi.org/10.1515/opag-2018-0067.
Full textAbstract:
Abstract Micro-nutrients especially zinc can not only increase the yield of sweet potato but can also improve the quality of tubers. Hence, experiments were carried out in 2015 and 2016 cropping seasons to determine the impact of various levels of ZnSO4 fertilizer on soil chemical properties, foliage and storage root yields and proximate qualities of sweet potato (Ipomoea batatas L.). The experiments consisted of 5 levels (0, 5, 10, 15 and 20 kg ha-1) of ZnSO4 fertilizer. These were arranged in a randomized complete block design and replicated three times. ZnSO4 increased (with the exception of P) soil chemical properties compared with the control. N, K, Ca, Mg and Zn were increased up to the 20 kg ha-1 ZnSO4 level in both years. ZnSO4 reduced P concentrations in soil as the level increased. For sweet potato performance, 5 kg ha-1 ZnSO4 fertilizer had the highest values of foliage yield (vine length and vine weight) and storage root yield. Using the mean of the two years and compared with the control, ZnSO4 fertilizer at 5 kg ha-1 increased storage root yield of sweet potato by 17.4%. On fitting the mean storage root yield data of the two years with a cubic equation, the optimum rate of Zn for sweet potato was found to be 3.9 kg ha-1 to achieve the maximum sweet potato yield. In this study, relative to the control, ZnSO4 fertilizer increased moisture and decreased the fibre contents of sweet potato. There were no consistent patterns of variation between the 5, 10, 15 and 20 kg ha-1 ZnSO4 treatments for proximate qualities except that the highest values of fat, protein, carbohydrate and ash was at 5 kg ha-1 ZnSO4.
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Verma, R. S., R. S. Chauhan, and R. N. Singh. "Studies on Row Arrangement and Population Densities of Potato Cultivars in a Sugarcane and Potato Intercropping System in North Central India." Experimental Agriculture 21, no. 4 (October 1985): 321–27. http://dx.doi.org/10.1017/s0014479700013144.
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SUMMARYFour plant densities and two genotypes of potato intercropped with sugarcane were examined at Lucknow, India and compared with potato–sugarcane sequential cropping. The best yields and monetary returns were obtained with one sugarcane row to two rows of potato (Kufri Chandramukhi) at 80 × 103 potato plants ha−1; this treatment combination gave virtually a full yield of both potato and cane. Sequential cropping of potato and sugarcane with 80 × 103 potato plants ha−1 in rows 50 cm apart gave better yields than intercropping potato with sugarcane in a 1:1 row arrangement. Kufri Chandramukhi, a short duration variety of potato, was more suitable for intercropping with sugarcane than the long duration Kufri Sindhuri. Growing potato either in sequence or as an intercrop with sugarcane decreased soil bulk density and increased its available nitrogen content.
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MULEMA, J. M. K., E. ADIPALA, O. M. OLANYA, and W. WAGOIRE. "YIELD STABILITY ANALYSIS OF LATE BLIGHT RESISTANT POTATO SELECTIONS." Experimental Agriculture 44, no. 2 (April 2008): 145–55. http://dx.doi.org/10.1017/s0014479708006133.
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SUMMARYPotato is an important source of food and income in the highlands of East Africa. Identification of superior genotypes for improved agronomic characteristics will enhance tuber yield. Seven promising clones from population B potato selections (quantitative resistance to late blight) obtained from the International Potato Center, two genotypes from population A (qualitative resistance) and three control cultivars were evaluated for three cropping seasons at four locations in western Uganda in order to determine performance and yield stability. The additive main effects and multiplicative interactive (AMMI) model was used for the analysis. The analysis of variance of yield data for genotypes × locations, genotypes × seasons and genotypes × locations × seasons was significant (p < 0.05) showing the variable response of genotypes and the need for stability analysis. The AMMI statistical model showed that the most stable genotypes were 392618.250 (B5) and 392127.270 (B6) (high yield) and 392618.256 (B1), 391049.255 (B2) and 392127.256 (B7) (low yield) and had negligible interactions with the environments. Across environments, the ranking of genotypes for tuber yield was not consistent. The clones 381471.18 (A2), 387121.4 (A1) and cultivar Victoria had high average yields, but these yields were below average in a few environments. Selective deployment of cultivars can improve tuber yield in the highland tropics.Note: Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation for endorsement by the US Department of Agriculture, Makerere University or Kachwekano Agricultural Research and Development Center.
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Baziramakenga, Régis, and Gilles D. Leroux. "Economic and interference threshold densities of quackgrass (Elytrigia repens) in potato (Solanum tuberosum)." Weed Science 46, no. 2 (April 1998): 176–80. http://dx.doi.org/10.1017/s004317450009038x.
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Field studies were conducted in 1989 and 1990 at St-Augustin, Quebec, Canada, to determine the economic threshold density of quackgrass in potato. Potato yield losses due to quackgrass interference increased with quackgrass population density. Potato yield ranged from 33 to 73% in 1989, and from 19 to 44% in 1990. The relationship between potato yield losses and quackgrass densities was described by a rectangular hyperbolic function. Dry weight of quackgrass proved to be the best predictor of potato yield loss compared to shoot number. The interference thresholds for 10% potato yield loss amounted to 25 shoots m−2or 20 g total dry biomass m−2. The economic threshold varied between 0.04 and 2 shoots m−2or 0.0165 and 1.5 g total dry biomass m−2, depending on the variables considered.
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Tessema, Lemma, and Zebenay Dagne. "Aeroponics and Sand Hydroponics: Alternative Technologies for Pre-Basic Seed Potato Production in Ethiopia." Open Agriculture 3, no. 1 (October 1, 2018): 444–50. http://dx.doi.org/10.1515/opag-2018-0049.
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Abstract Potato is the third most important food crop worldwide after rice and wheat in terms of human consumption, and global production exceeds 374 million metric tons. Despite this immense importance, potato yields from small-scale farmers in most developing countries including Ethiopia fall far below their capacity, mainly because of insufficient access to high quality seed and limited knowledge on crop husbandry. Moreover, 98.7% of the seed being used come from the informal seed system which lacks appropriate phytosanitary schemes. Frequent seed degeneration nature and low multiplication rate of the crop also provoked less productivity of potato. Hence, technological improvements are necessary for increasing potato productivity and decreasing different bottlenecks of the crop. Aeroponics, sand hydroponics and tissue culture based seed multiplication techniques are currently accelerating the supply of disease free seed potato to the country. Thus, to take advantage of the yield capability of potato by improving the maximum production determinant elements like seed quality, these alternative pre-basic seed potato multiplication technologies could be duly verified and used as an option to boost the yield of potato.