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Academic literature on the topic 'Potassium fertilizers'

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Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Potassium fertilizers"

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Aryani, Ida, Gamal Abdul Nasser, Dali Dali, Neni Marlina, Marlina Marlina, Khodijah Khodijah, Joni Ph Rompas, and Ahid Zamroni. "Potensi Peningkatan Hasil Jagung Manis (Zea Mays Saccharata Sturt) Melalui Kombinasi Dosis Pupuk Nitrogen dan Kalium." Journal on Education 5, no. 4 (April 20, 2023): 16276–85. http://dx.doi.org/10.31004/joe.v5i4.2773.

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This study aims to obtain the right dosage of nitrogen and potassium fertilizers as well as the interaction between nitrogen and potassium in increasing the growth and yield of sweet corn (Zea mays var. saccharata). This study used a factorial randomized block design consisting of 2 treatment factors, namely nitrogen and potassium fertilizer treatment, with 3 replications. Factor I Nitrogen fertilizer treatment with the dose: N0: Without nitrogen fertilizer (control), N1: Nitrogen fertilizer 150 kg/ha Urea, N2: Nitrogen fertilizer 300 kg/ha Urea. Factor II Potassium Fertilizer : K0 : Without Potassium Fertilizer (control), KI : Potassium Fertilizer 200 kg/ha K2O, K2 : Potassium Fertilizer 300 kg/ha K2O. The parameters observed in this study were plant height (cm), cob length (cm), cob weight (grams), cob diameter (grams) and dry chestnut weight (grams). The results of the analysis of variance showed that the treatment of nitrogen fertilizers and potassium fertilizers had a significant to very significant effect on all observed variables. The interaction of nitrogen and potassium fertilizers had a significant effect on cob weight and had a very significant effect on plant height, cob diameter and dry matter weight and had no significant effect on cob length.
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Wang, Jin, Yuhang Lu, Xuemei Zhang, Wenjie Hu, Lijin Lin, Qunxian Deng, Hui Xia, Dong Liang, and Xiulan Lv. "Effects of Potassium-Containing Fertilizers on Sugar and Organic Acid Metabolism in Grape Fruits." International Journal of Molecular Sciences 25, no. 5 (February 29, 2024): 2828. http://dx.doi.org/10.3390/ijms25052828.

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To identify suitable potassium fertilizers for grape (Vitis vinifera L.) production and study their mechanism of action, the effects of four potassium-containing fertilizers (complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate) on sugar and organic acid metabolism in grape fruits were investigated. Potassium-containing fertilizers increased the activity of sugar and organic acid metabolism-related enzymes at all stages of grape fruit development. During the later stages of fruit development, potassium-containing fertilizers increased the total soluble solid content and the sugar content of the different sugar fractions and decreased the titratable acid content and organic acid content of the different organic acid fractions. At the ripening stage of grape fruit, compared with the control, complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate increased the total soluble solid content by 1.5, 1.2, 3.5, and 3.4 percentage points, decreased the titratable acid content by 0.09, 0.06, 0.18, and 0.17 percentage points, respectively, and also increased the total potassium content in grape fruits to a certain degree. Transcriptome analysis of the differentially expressed genes (DEGs) in the berries showed that applying potassium-containing fertilizers enriched the genes in pathways involved in fruit quality, namely, carbon metabolism, carbon fixation in photosynthetic organisms, glycolysis and gluconeogenesis, and fructose and mannose metabolism. Potassium-containing fertilizers affected the expression levels of genes regulating sugar metabolism and potassium ion uptake and transport. Overall, potassium-containing fertilizers can promote sugar accumulation and reduce acid accumulation in grape fruits, and potassium sulfate and potassium dihydrogen phosphate had the best effects among the fertilizers tested.
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Wen, Mingxia, Ji Zhang, Yongqiang Zheng, and Shilai Yi. "Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality." Agronomy 11, no. 10 (September 30, 2021): 1990. http://dx.doi.org/10.3390/agronomy11101990.

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In this study, we investigated the effects of the combined application of different doses of potassium and organic fertilizers on the nutrient uptake, yield, and quality of Newhall navel oranges (Citrus sinensis Osb. cv.). The citrus trees were treated with potassium fertilizer alone or with one of three combinations of organic and potassium fertilizers. Spring shoots, autumn shoots, and fruit were collected when they reached maturity, and the relevant indexes were determined by conventional methods. The soil carbon flux was measured 15, 35, 65, and 95 days after fertilizer application by a soil gas flux measuring instrument. The results showed that the dry weights of leaves and twigs of the spring shoots were 43.1% and 99.8% higher in the OM15+K05-treated (15 kg organic manure and 1.05 kg potassium sulfate per plant) than in the OM0+K25-treated (1.25 kg potassium sulfate per plant) plants, respectively. Combined potassium and organic fertilizer application helped the shoots and fruits to absorb more mineral nutrients. As a result, the fruit yield increased, fruit surface color improved, and skin thickness became thinner. The internal quality of the fruit was also improved by the combination of different potassium fertilizers and organic fertilizers. The fruit quality was optimal for the OM10+K15-treated plants. The recommended doses of organic and potassium sulfate fertilizers for Newhall navel orange orchards with purple paddy soil in southwestern China are 5–10 kg/plant and 1.15–1.20 kg/plant, respectively.
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Vorobieva, L. A., and V. A. Anishchenko. "Effect of mineral fertilizers on productivity and quality of yellow lupine cultivated on soddy-podzolic sandy soil." IOP Conference Series: Earth and Environmental Science 901, no. 1 (November 1, 2021): 012020. http://dx.doi.org/10.1088/1755-1315/901/1/012020.

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Abstract The article presents the results of investigations carried out in a field experiment on sod-podzolic sandy soil contaminated with radionuclides, the efficiency of influence of doses and kinds of potassium fertilizers on the yield, 137Cs accumulation and fodder value of yellow lupine was studied. The carried out researches showed that the optimum doses of phosphorus-potassium fertilizers for getting an increased yield of green mass is P45K150, in both studied types of potassium fertilizers. To get the maximum grain yield of lupine, the optimal doses of mineral fertilizers are P45K150 and P45K210. Analyzing the effect of different types of potassium fertilizers on the formation of yellow lupine grain yield, it can be noted that the use of potassium fertilizer - Kalimag, the yield was higher than that of potassium chloride. To decrease accumulation of 137Cs in lupine green mass below permissible level, the doses of mineral fertilizers shouldn’t be less than P45K150. Maximum decrease of radionuclides in the grain was noted in the variant P45K210 (Kmg).
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Chertkova, N. G., T. I. Firsova, Yu G. Skvortsova, G. A. Filenko, and R. O. Ryabov. "The use of complex fertilizers in seed production of winter wheat varieties." Grain Economy of Russia 1, no. 2 (May 2, 2021): 52–57. http://dx.doi.org/10.31367/2079-8725-2021-74-2-52-57.

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The current paper has presented the results of the estimation of productivity of the winter wheat varieties ‘Krasa Dona’, ‘Polina’ and ‘Yubiley Dona’ when using liquid complex fertilizers ‘Strada N + Mono Sulfur (S)’, ‘Strada P + Mono Sulfur (S)’ and ‘Diform Silicon-potassium’. The treatment of winter wheat plants was carried out in the form of foliar top-dressings in the stages of tillering and stem extension. The study was carried out on the basis of the FSBSI “Agri- cultural Research Center “Donskoy” in 2019-2020. The trials were laid in the crop rotation of the laboratory for primary seed production and seed study. The purpose was to study the effect of liquid complex fertilizers on the productivity of the studied winter wheat varieties. When using fertilizers for all varieties, there was a tendency to an increase in the density of the productive stand on 18-61 pcs/m2 in comparison with the control. The variety ‘Krasa Dona’ showed the best indicators of the traits ‘number of grains per head’, ‘grain weight per head’ and ‘1000 grain weight’ being fertilized with ‘Strada N + S’ (43 pcs., 2.19 g and 45.7 g) and ‘Diform Silicon-potassium’ (46 pcs., 2.30 g and 46.5 g). The variety ‘Polina’ showed good results after being treated with ‘Strada P + S’ (48 pcs., 2.30 g and 42.1 g) and ‘Diform Silicon-potassium’ (51 pcs., 2.43 g and 42.4 g). The variety ‘Yubiley Dona’ showed the greatest increase of the trait ‘number of grains’ with the fertilizer ‘Diform Silicon-potassium’. The trait ‘1000 grains weight’ had an increase of 2.3 g, and ‘grain weight per head’ was 0.29 g. The treatment with fertilizers did not affect the trait ‘plant height’. The highest productivity of the variety ‘Krasa Dona’ was obtained when being fertilized with ‘Strada N + S’ (9.4 t / ha) and ‘Diforma Silicon-potassium’ (9.5 t/ha); the productivity of the variety ‘Polina’ increased after ‘Strada P + S’ (8.8 t/ha) and ‘Diform Silicon-potassium’ (9.1 t/ha), and the productivity of the variety ‘Yubiley Dona’ increased after ‘Diform Silicon-potassium’ (8.9 t/ha). The maximum economic effect (19080 rubles/ha) with 9.5 t/ha of productivity was obtained from the variety ‘Krasa Dona’ after the treatment with the fertilizer ‘Diform Silicon-potassium’. The experimental results have shown that the use of complex fertilizers has a positive effect on the productivity of winter wheat plants.
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Nafis, Fika Fatwa Anin, Djoko Kustono, and Anindya Hapsari. "Analysis of Nitrogen, Phosphorus and Potassium Concentration in Modified Liquid Organic Fertilizers of Vegetable Waste, Charcoal and Snails." Preventia : The Indonesian Journal of Public Health 8, no. 1 (June 30, 2023): 58. http://dx.doi.org/10.17977/um044v8i12023p58-61.

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Nitrogen, phosphorus and potassium concentration in liquid organic fertilizer can be obtained from organic materials. Liquid organic fertilizer can be made from vegetable waste, charcoal, and gold snail (Pomacea canaliculata L.). This study aimed to know the concentration of nitrogen, phosphorus and potassium in liquid organic fertilizers of waste vegetable, charcoal and snail. Methods used to test nitrogen was the Kjeldahl method, while potassium and phosphorus tested with spectrophotometer. The results showed that the concentration of nitrogen, phosphorus and potassium in liquid organic fertilizers of waste vegetable, charcoal and snail were 0,2612 percent; 0,0334 percent; and 0,1421 percent. This concentration didn’t meet the standard of liquid organic fertilizers quality based on MOA No. 70 of 2010 which is 3 until 6 percent.
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Hu, Wenjie, Jin Wang, Qunxian Deng, Dong Liang, Hui Xia, Lijin Lin, and Xiulan Lv. "Effects of Different Types of Potassium Fertilizers on Nutrient Uptake by Grapevine." Horticulturae 9, no. 4 (April 8, 2023): 470. http://dx.doi.org/10.3390/horticulturae9040470.

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Potassium (K) is the most important element for fruit quality improvement. This study aimed at determining the best K fertilizer type that can promote grape growth and nutrient uptake. Specifically, four types of K fertilizers (complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate) were applied to grapevines grown in plastic pots, and then their effects on grape growth and nutrient uptake were explored. Results showed that the complex fertilizer and potassium nitrate treatments increased the biomass of the grapevine plants, whereas the other fertilizers had no significant effects on the biomass. Only the potassium nitrate treatment increased the contents of photosynthetic pigments in grapevine leaves. The complex fertilizer and potassium nitrate treatments increased the total N content in the grapevine plants to some extent, whereas the other fertilizer treatments decreased the total N content to some extent. It was also evident that all four K fertilizers increased the total P and K contents in the grapevine plants. Compared to the control, the complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate treatments increased the scion total P content by 20.18%, 9.77%, 12.52%, and 30.81%, respectively, and increased the scion total K content by 15.37%, 8.41%, 20.15%, and 26.48%, respectively. In addition, correlation and grey relational analyses showed that the rootstock stem total N content, rootstock root biomass, and soil alkali-hydrolyzable N concentration were the top three indicators most closely associated with the scion total N content, whereas the rootstock root total P content, soil available P concentration, and rootstock stem total P content were the top three indicators most closely associated with the scion total P content. Additionally, the rootstock root total K content, soil available K concentration, and rootstock root total P content were the top three indicators most closely associated with the scion total K content. Overall, the different K fertilizers can all promote the uptake of P and K by grapevine plants, and the potassium dihydrogen phosphate fertilizer is the best choice.
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Kuzin, A. I., A. V. Kushner, A. A. Shmakova, G. B. Sviridov, and V. N. Nazarov. "Effect of potassium humate on the yield and N, P, K content in soil and leaves of cv. Ligol apple in Central Chernozem region." Horticulture and viticulture, no. 1 (March 17, 2023): 35–42. http://dx.doi.org/10.31676/0235-2591-2023-1-35-42.

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Nutrient management of high-density apple orchards remains to be a serious problem in central Russia. Enhancing apple productivity by applying higher fertilizer rates leads to an increased environmental burden and undesired consequences. Although the transition to organic farming may solve many horticultural problems, conventional methods still produce higher crop yields. One of the most pressing issues consists in reducing mineral fertilizer use by applying more organic substances. This approach allows soil fertility to be preserved while maintaining high levels of plantation productivity. In the present research, particular attention was paid to potassium nutrition of apple trees. During 2020 and 2021, we studied the effect of potassium fertilizers in various standard amounts and silicon-modified potassium humate on the state of apple trees cv. Ligol grafted on 62-396 rootstock in the experimental orchard of I.V. Michurin Federal Research Center. The orchard was planted in 2018 according to a 1.2×4.5 m pattern (1852 trees per hectare). The experimental design was as follows: control (irrigation); full standard amount of N20P6K28 fertilizers; ¾ standard amount of N15P4K21 mineral fertilizers + ½ standard amount of potassium humate, ½ standard amount of N10P3K14 mineral fertilizers + ½ standard amount of potassium humate; full standard potassium humate amount of 10 L/ha. In 2020, the introduction of potassium humate provided the maximum yield, although without significant differences compared to the use of mineral fertilizers. In 2021, the yield was also at the level achieved with mineral fertilizers. Potassium humate provided a higher nitrogen content in the leaves as compared to mineral fertilizers, largely due to a significant increase in the availability of nitrogen and potassium in the soil. The content of available phosphorus was not significantly affected. This assumes that the effectiveness of humates depends on the soil type. The combined application of reduced standard amounts of mineral fertilizers and potassium humate contributed to maintenance of high yields under with a less dramatic increase in soil acidity.
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Rosawanti, Pienyani. "Kandungan Unsur Hara Pada Pupuk Organik Tumbuhan Air Lokal." Daun: Jurnal Ilmiah Pertanian dan Kehutanan 6, no. 2 (February 14, 2020): 140–48. http://dx.doi.org/10.33084/daun.v6i2.1260.

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Water hyacinth, giant salvinia and water lettuce are widely available in Central Kalimantan that can be used as organic fertilizer. This study aims to determine the nutrient content of solid and liquid organic fertilizers in water hyacinth, giant salvinia and water lettuce fertilizers. The results showed that solid organic fertilizer/compost and water hyacinth, water lettuce and giant salvinia liquid fertilizer have nutrient content needed by plants. In solid fertilizers, the Nitrogen of giant salviniacontent was 2.43% and lack of the minimum standard of solid organic fertilizer, while Phospor and Potassium content were not included in the standard. In liquid organic fertilizer, Nitrogen, Phospor and Potassium content were not included in the minimum standard organic fertilizer requirements
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Broschat, T. K., D. R. Sandrock, M. L. Elliott, and E. F. Gilman. "Effects of Fertilizer Type on Quality and Nutrient Content of Established Landscape Plants in Florida." HortTechnology 18, no. 2 (January 2008): 278–85. http://dx.doi.org/10.21273/horttech.18.2.278.

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In a series of three experiments, st. augustinegrass (Stenotaphrum secundatum ‘Floratam’), areca palm (Dypsis lutescens), canna (Canna × generalis ‘Richard Wallace’), pentas (Pentas lanceolata), allamanda (Allamanda cathartica ‘Hendersoni’), and nandina (Nandina domestica) were grown on highly leached sand soils in two locations in Florida. They were fertilized with typical turfgrass fertilizers having high nitrogen (N)-to-potassium (K) ratios and no magnesium (Mg), or several types of landscape palm fertilizers having low N:K ratios and 100% of their N, K, and Mg in controlled release form. St. augustinegrass, pentas, nandina, and allamanda visual quality were similar for all fertilizer types tested. However, cannas and areca palms had higher visual qualities when fertilized with an 8N–0.9P–10.0K–4Mg palm fertilizer than with higher N:K ratio turf fertilizers. High N:K turf fertilizers resulted in K deficiency severity equivalent to that of unfertilized controls and Mg deficiency that was more severe than unfertilized areca palms.
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Dissertations / Theses on the topic "Potassium fertilizers"

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Young, Bradford Kenneth Guertal Elizabeth A. "Potassium movement and uptake as affected by potassium source and placement." Auburn, Ala, 2009. http://hdl.handle.net/10415/1575.

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More, Ketseemang. "Response of cabbage (Brassica Oleracea Var Capitata) transplants to nitrogen, phosphorus and potassium nutrition." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-09212007-133240.

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Rose, Terry. "Deep-placed phosphate fertiliser improves phosphorus uptake and seed yield of canola (Brassica napus L.) in a Mediterranean-type climate." University of Western Australia. Dept. of Soil Science and Plant Nutrition, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0237.

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In Mediterranean-type climates, topsoil frequently dries out during spring. Problems associated with reduced nutrient (P, K) availability in dry topsoil may be overcome by placing fertilisers deeper in the soil, where the soil is more likely to remain moist for longer periods as opposed to conventional fertiliser placement. Deep-P placement has resulted in significant yield improvements for lupin crops in Mediterranean environments because lupin crops generally require soil P supply during spring (throughout the flowering stage); in contrast, wheat yields have seldom improved with deep P placement, presumably because plants have accumulated sufficient P prior to spring (grain filling stage) for maximum grain yields. The P and K accumulation patterns of canola had not been investigated, and therefore any potential yield benefits of deep placed fertilisers were unknown. This study aimed to define the P and K demands of canola throughout the growing season, and assess the viability of deep placement of fertiliser in matching soil P and K supply to crop demand. The study further investigated the impact of deep placement of P fertiliser on root growth and distribution throughout the soil profile. Initial glasshouse studies compared the P and K accumulation patterns of several canola cultivars with wheat, and found that the P and K demand of canola continued until later into the season than wheat, but there was little difference in the P and K accumulation patterns of the various canola cultivars. Further experiments in sand culture determined that regardless of the level of K supply, canola plants had accumulated sufficient K for maximum seed yields by early flowering. Under high P supply, canola plants had accumulated enough P for maximum seed yields by early flowering, but when P supply during vegetative growth was just adequate, plants required a continual P supply until mid silique-filling to attain maximum yields. Because plants had accumulated sufficient K for maximum seed yields by early flowering (therefore topsoil drying in spring was unlikely to affect yields), further field experiments examined only deep placement of P fertiliser to improve P uptake and yields.
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Badra, Abdo. "Effects of potassium, magnesium, and sulfur fertilization on corn grain and silage yields in a high nutrient soil." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60449.

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The effects of added potassium, K, magnesium, Mg and sulfur, S on corn grain and silage yields were investigated in the field for two years.
Due to high nutrient soil, K, Mg and S had no effects on corn grain and silage yields. However, there were trends observed in the treatment effects that were significant. Added K at 240 kg K$ sb2$O/ha increased grain yield over zero kg K$ sb2$O/ha in 1983 and Mg at 60 kg/ha increased grain yield over 30 kg/ha in 1984. In silage, 240 kg K$ sb2$O/ha increased yield over 120 and zero kg K$ sb2$O/ha in 1984. Although there was no K by Mg interaction, there was a need for added Mg to achieve higher yields.
The cumulative effect of fertilizer S at 50 kg/ha significantly reduced silage yield in 1984 over zero S treatment indicating that fertilizer S was unnecessary for corn growth by reason of high levels of soil S and sufficient S provided from precipitation and air dry deposition. S had no interaction with K and Mg because there was no need for fertilizer S to increase yields.
The antagonistic association between K and Mg was seen at the seedling, tasseling and silking stages.
There was an indication of a K by S interaction which was expressed at different stages of growth, but this effect was not evident for dry matter yields.
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Razmjoo, Ghalaie Khorshid. "Effect of potassium, sulfur, boron, and molybdenum fertilization on alfalfa production and herbage composition /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859495673.

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Rajabipour, Ali. "Effects of Ca, K and water table depth on tomato mechanical properties." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39984.

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Two series of tests were performed in summer 1993 and repeated in summer 1994 to investigate effects of potassium, calcium and water table depth on mechanical properties of tomato fruit. In the first group of tests five mechanical properties stress, strain, ER (ratio of stress to strain at break), energy and toughness were calculated from the force-deformation curve obtained by compression of pericarp disks taken from tomato fruits (cv New Yorker) at the breaker stage. In the second group of tests force, deformation and energy were obtained from puncture tests on whole tomato fruit. The textural parameters were used to compare the effects of the potassium, calcium and water level depths on the mechanical properties of tomatoes. Results showed the effects of calcium and water table depths on the mechanical properties were significant. Tomato fruits exposed to increasing moisture stress levels by increasing water table depth exhibited increased firmness. Increased application of calcium also resulted in increased firmness. Application of different potassium levels had in general no significant effect on breaking stress, strain, ER, energy and toughness of tomato fruit pericarp.
A new method of measuring skin strength of tomatoes is described. The method, refered to as loop method, overcame the problems with the existing method using mechanical grips. Further, the loop method was applied to measure the effect of potassium and calcium on skin strength of tomato. Using the loop method, data were collected on relaxation of tomato skin (epidermis). A computer program was written to model th tensile stress relaxation behaviour of tomato skin. The program was employed to calculate linear and non-linear coefficients of a relaxation model. The fitted values were in a very good agreement with experimental data (R$ sp2>$0.99).
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Chen, Jiansheng. "Effects of added nitrogen and potassium on selected soil properties and on yield and nutrient uptake of silage corn." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59948.

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An incubation study was conducted to evaluate the effects of added urea, NH$ sb4$Cl, and KCl on fixation of NH$ sb4 sp{+}$ and K$ sp{+}$. A field study was carried out to observe the effects of rates and methods of added urea and KCl on the forms and distribution of N and K in soils, and on yields and nutrient uptake of silage corn.
Generally, the fixation of NH$ sb4 sp{+}$ was increased by added N but reduced by added K and vice versa. One exception was that added K increased NH$ sb4 sp{+}$ fixation when NH$ sb4$Cl was the N source. In comparison with NH$ sb4$Cl, urea resulted in greater K$ sp{+}$ fixation but less NH$ sb4 sp{+}$ fixation.
Band placement of urea and KCl showed apparent accumulation of NH$ sb4$-N and NO$ sb3$-N, and exchangeable K$ sp{+}$ in the fertilizer bands, particularly early in the growing season. On the other hand, band placement resulted in lower levels of available N and K in soil between the bands in comparison with broadcast.
Yields of silage corn and nutrient uptake values were increased by N and K fertilizers, except for one soil in the first year. Band placement of urea was superior in the case of frequent and light rainfall but inferior with dry surface soil conditions followed by a relatively large rainfall 3 or 4 days after application. In the latter condition, banding K resulted in less yields on one soil, and banding the two fertilizers together further reduced N utilization on another soil.
Additions of K suppressed Ca and Mg uptake but did not influence N uptake, whereas K uptake was usually enhanced by added N.
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Mercer, Lee Jonathan. "Radio-caesium uptake and flux in wheat as influenced by external potassium concentration." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369102.

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Hart, R. "The potential use of synthetic faujasite zeolites as slow release ammonium and potassium fertilizers." Thesis, City University London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375831.

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Pholsen, Suradej. "Effects of nitrogen, potassium and organic matter on growth, chemical components and seed yields of IS 23585 forage sorghum cultivar." Thesis, University of Hertfordshire, 2003. http://hdl.handle.net/2299/14178.

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Sorghum is considered to be of African origin and subsequently spread to most countries in tropical and subtropical regions. Sorghum has outstanding resistance against drought conditions. Grain and fodder from sorghum plants have been used for man's and animals' consumption respectively for many decades. Experiments were conducted on Yasothon soil series (Oxic Paleustults) in Northeast Thailand, this is considered a poor soil. Growth parameters of sorghum were affected most by nitrogen chemical fertiliser followed by potassium chemical fertiliser. An increase in nitrogen level increased growth parameters and seed yields/ha of the sorghum plants whilst an increase in potassium also increased growth parameters and seed yields but to a lesser extent. High application rates of both nitrogen and potassium were required to achieve high total dry weights and seed yields/ha. Fermented cattle manure significantly increased growth parameters of the sorghum plants and soil properties. were also improved by cattle manure. Total dry weights and seed yields/ha were affected most by seasons and treatments whilst seasons x treatments had highly significant effects on seed yields/ha but not total dry weights/ha. In terms of economic viewpoint, optimum application rates for nitrogen at a range of 300-450 kg N/ha and 100 kg K20/ha for potassium plus 40 tonnes/ha of fermented cattle manure were the recommended rates for optimum above ground total dry weight (15,940-26,282 kg/ha) and seed yield (5,047- 6,374 kg/ha) of IS 23585 forage sorghum cultivar on Yasothon soil series. An increase in nitrogen fertiliser application increased estimated crude protein (CP) of the sorghum plants whilst potassium did not. Both nitrogen and potassium had no Significant effects on acid detergent fibre (ADF), neutral detergent fibre (NDF), and dry matter degradability (DMO). However, seasons had significant effects on CP, NDF, ADF, DMD and brix values. Treatments also had significant effects on all components except DMD, and brix values. Seasons x treatments had significant effects on all components except CP and brix values.
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Books on the topic "Potassium fertilizers"

1

Gething, P. A. The potassium-nitrogen partnership: Improving returns from nitrogen fertilizer. Bern, Switzerland: International Potash Institute, 1986.

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Gething, P. A. The potassium-nitrogen partnership: Improving returns from nitrogen fertilizer. Bern, Switzerland: International Potash Institute, 1986.

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Gething, P. A. The potassium-nitrogen partnership: Improving returns from nitrogen fertilizer. Bern, Switzerland: International Potash Institute, 1986.

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Technology Information Forecastin and Assessment Council (India), ed. Recovery of potassium fertiliser salts from sea bittern. New Delhi: TIFAC, 2002.

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I͡Anshin, Aleksandr Leonidovich. Rudy plodorodii͡a. Moskva: "Sov. Rossii͡a", 1985.

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I︠A︡nshin, A. L. Rudy plodorodii︠a︡. Moskva: "Sov. Rossii︠a︡", 1985.

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Roberts, S. Potato use of phosphorus and potassium in sandy soils. Pullman: College of Agriculture and Home Economics Research Center, Washington State University, 1988.

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Zharikova, E. Kaliĭ v pochvakh Vostochnoĭ burozemno-lesnoĭ oblasti Rossii. Vladivostok: Dalʹnauka, 2006.

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Dampney, P. M. R. Phosphate, potash and magnesium for grassland. London: Agricultural Development and Advisory Services, 1991.

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Goh, Kah Joo. K nutrition for mature oil palm in Malaysia. Basel, Switzerland: International Potash Institute, 1994.

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Book chapters on the topic "Potassium fertilizers"

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Young, Ronald D. "Preparation of Finished Fertilizers Containing Potassium." In The Role of Potassium in Agriculture, 53–61. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1968.roleofpotassium.c3.

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Mikkelsen, Robert L., and Terry L. Roberts. "Inputs: Potassium Sources for Agricultural Systems." In Improving Potassium Recommendations for Agricultural Crops, 47–73. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_2.

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AbstractIn the potassium (K) cycle, inputs encompass all K sources that move into a given volume of soil. These inputs may include atmospheric deposition, irrigation water, runoff, erosion, as well as seeds, cuttings, and transplants. Accounting for all inputs is seldom routinely done on the farm. Many K inputs have variable concentrations, making estimations difficult. Estimates for added K are provided in some planning documents and can be used where testing of on-farm inputs is not feasible, although testing is preferred. Standard commercial fertilizers have known concentrations of K and are concentrated enough to be economical to transport long distances. The global reserves for their production have an estimated lifetime of thousands of years. This chapter emphasizes considerations for using various commercial fertilizer sources.
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Singh, Vijay Kant, Arsh Alam Singh Gill, Anand Singh, Omkar Singh, and Tejbal Singh. "Natural Potassium Fertilizers for Sustainable Agriculture." In Encyclopedia of Green Materials, 1–13. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-4921-9_262-1.

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Barber, Stanley A., Robert D. Munson, and W. B. Dancy. "Production, Marketing, and Use of Potassium Fertilizers." In Fertilizer Technology and Use, 377–410. Madison, WI, USA: Soil Science Society of America, 2015. http://dx.doi.org/10.2136/1985.fertilizertechnology.c10.

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Rosolem, Ciro A., Antonio P. Mallarino, and Thiago A. R. Nogueira. "Considerations for Unharvested Plant Potassium." In Improving Potassium Recommendations for Agricultural Crops, 147–62. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_6.

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AbstractPotassium (K) is found in plants as a free ion or in weak complexes. It is easily released from living or decomposing tissues, and it should be considered in fertilization programs. Several factors affect K cycling in agroecosystems, including soil and fertilizer K contributions, plant K content and exports, mineralization rates from residues, soil chemical reactions, rainfall, and time. Soil K+ ions can be leached, remain as exchangeable K, or migrate to non-exchangeable forms. Crop rotations that include vigorous, deep-rooted cover crops capable of exploring non-exchangeable K in soil are an effective strategy for recycling K and can prevent leaching below the rooting zone in light-textured soils. The amount of K released by cover crops depends on biomass production. Potassium recycled with non-harvested components of crops also varies greatly. Research with maize, soybean, and wheat has shown that 50–60% of K accumulated in vegetative tissues is released within 40–45 days. A better understanding of K cycling would greatly improve the efficacy of K management for crop production. When studying K cycling in agricultural systems, it is important to consider: (1) K addition from fertilizers and organic amendments; (2) K left in residues; (3) K partitioning differences among species; (4) soil texture; (5) soil pools that act as temporary sources or sinks for K. In this chapter, the role of cash and cover crops and organic residues on K cycling are explored to better understand how these factors could be integrated into making K fertilizer recommendations.
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Bell, Michael J., Michel D. Ransom, Michael L. Thompson, Philippe Hinsinger, Angela M. Florence, Philip W. Moody, and Christopher N. Guppy. "Considering Soil Potassium Pools with Dissimilar Plant Availability." In Improving Potassium Recommendations for Agricultural Crops, 163–90. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_7.

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AbstractSoil potassium (K) has traditionally been portrayed as residing in four functional pools: solution K, exchangeable K, interlayer (sometimes referred to as “fixed” or “nonexchangeable”) K, and structural K in primary minerals. However, this four-pool model and associated terminology have created confusion in understanding the dynamics of K supply to plants and the fate of K returned to the soil in fertilizers, residues, or waste products. This chapter presents an alternative framework to depict soil K pools. The framework distinguishes between micas and feldspars as K-bearing primary minerals, based on the presence of K in interlayer positions or three-dimensional framework structures, respectively; identifies a pool of K in neoformed secondary minerals that can include fertilizer reaction products; and replaces the “exchangeable” K pool with a pool defined as “surface-adsorbed” K, identifying where the K is located and the mechanism by which it is held rather than identification based on particular soil testing procedures. In this chapter, we discuss these K pools and their behavior in relation to plant K acquisition and soil K dynamics.
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Bell, Michael J., Antonio P. Mallarino, Jeff Volenec, Sylvie Brouder, and David W. Franzen. "Considerations for Selecting Potassium Placement Methods in Soil." In Improving Potassium Recommendations for Agricultural Crops, 341–62. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_12.

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AbstractPlacement strategies can be a key determinant of efficient use of applied fertilizer potassium (K), given the relative immobility of K in all except the lightest textured soils or high rainfall environments. Limitations to K accessibility by plants caused by immobility in the soil are further compounded by the general lack of K-stimulated root proliferation in localized soil zones enriched with K alone, compared with root proliferation due to concentrated N and P. Further, effects of K fixation reactions in soils with certain clay mineralogies and the declining concentration and activity of soil solution K with increasing clay content can also limit plant K acquisition. Variation in root system characteristics among crops in a rotation sequence and fluctuating soil moisture conditions in fertilized soil horizons in rain-fed systems increase the complexity of fertilizer placement decisions to ensure efficient K recovery and use. This complexity has resulted in extensive exploration of fertilizer K application strategies, with this chapter focusing on K applications to the soil. Issues discussed include comparisons of broadcast versus banded applications, depth of fertilizer placement, and the impacts of co-location of K with other nutrients. While research findings are often specific to the crop, soil, and seasonal conditions under which they are conducted, we attempt to identify strategies that most consistently deliver improved crop recovery and utilization of fertilizer K.
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Achorn, Frank P., and Hubert L. Balay. "Developments in Potassium Fertilizer Technology." In Potassium in Agriculture, 49–66. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1985.potassium.c3.

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Kapusta, Edwin C. "Potassium Fertilizer Technology." In The Role of Potassium in Agriculture, 23–52. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1968.roleofpotassium.c2.

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Afanas’ev, Rafail A., and Genrietta E. Merzlaya. "The Content of Exchange Potassium in Soil with Prolonged Application of Fertilizers: Impact of Soil on Food Safety." In Food Product Optimization for Quality and Safety Control, 17–29. Includes bibliographical references and index.: Apple Academic Press, 2020. http://dx.doi.org/10.1201/9781003003144-2.

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Conference papers on the topic "Potassium fertilizers"

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Zolotarev, Vladimir. "Efficiency of fertilizer application on seed stands of birdsfoot trefoil." In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2021. http://dx.doi.org/10.33814/mak-2021-25-73-50-58.

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On sod-podzolic medium-loamy soils of the Central Non-Chernozem region of Russia with an average availability of mobile forms of phosphorus and an average close to low potassium content, high efficiency of using potash fertilizer together with phosphorus on birdsfoot trefoil seed crops was established. Effective doses of phosphorus-potassium fertilizers, providing an increase in seed yield in the first year by 42–47% and, according to the aftereffect, in the second year by 17–33%, are the application of P30–60K90–120. Keywords: Birdsfoot trefoil (Lotus corniculatus L.), seed herbage, phosphoric and potash mineral fertilizers, yield, seeds, sowing qualities.
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Karklina, Ilze, Zaiga Anna Zvaigzne, and Jelena Stola. "Chemical properties of needles as an indicator of nutrient status of fertilized coniferous stands." In Research for Rural Development 2020. Latvia University of Life Sciences and Technologies, 2020. http://dx.doi.org/10.22616/rrd.26.2020.012.

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Enhanced forest growth may respond to demand of woody resources and contribute to the climate change mitigation. Forest soil treatment with fertilizers, as well as drainage and thinning enhance forest growth. The analysis of needles is an established method in forest science to identify the nutrient status in the forest stand and need for forest soil enrichment with fertilizers. The aim of this research is to estimate the efficiency of forest soil enrichment with wood ash and ammonium nitrate in order to eliminate nutrient deficiency in forest stands. Forest soil was enriched with wood ash fertilizer or ammonium nitrate in 2016–2017. The current year needles were collected from fertilized and control plots, from three trees in each plot. The samples were collected in the period 2018–2019. Total nitrogen (g kg-1), calcium (g kg-1), magnesium (g kg-1), and potassium (g kg-1) were analyzed in the collected samples. The chemical properties of collected needles were compared at the individual object level to estimate the impact of fertilizer on forest stand. A statistically significant increase in the concentrations of potassium and phosphorus was detected in some plots treated with wood ash and ammonium nitrate. In addition, a correlation analysis conducted between the variables of chemical properties of needles and soil showed few significant correlations between nutrient content in needles and in soil samples.
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Kozlovskaya, V. F. "Prospects for the rhizosphere microorganisms integration into agricultural practice as biofertilizers." In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-141.

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Chemical fertilizers are a quick way to increase nutrients in the soil, but their use is economically costly and dangerous for the environment. Plant Growth Promoting Bacteria (PGPB) are able to increase the bioavailability of fertilizers through biological nitrogen (N) fixation, as well as potassium (K), phosphorus (P), and zinc (Zn) solubilization. The enhanced amount of soluble macro- and microelements in the close proximity of soil-root interface increases the fertilizer use efficiency ~ by 20-40 %.
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Alrbaihat, Mohammad R., Aiman E. Al-Rawajfeh, and Ehab Al Shamaileh. "Physio-chemical preparation of slow-release potassium fertilizers." In PHYSICAL MESOMECHANICS OF CONDENSED MATTER: Physical Principles of Multiscale Structure Formation and the Mechanisms of Nonlinear Behavior: MESO2022. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0158236.

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Hospodarenko, Hryhorii, and Vitalii Liubych. "Formation of yield and quality of winter durum wheat grain depending on long-term fertilization." In Research for Rural Development 2022 : annual 28th international scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2022. http://dx.doi.org/10.22616/rrd.28.2022.002.

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Durum wheat (Triticum durum Desf.) grain is the main raw material for the production of high-quality pasta and cereal products. The research was conducted at Uman National University of Horticulture (Ukraine) in a long-term stationary experiment, founded in 2011. The aim of the work was to study the impact of long-term use of various fertilization systems (with incomplete return of nitrogen, phosphorus and potash fertilizers) on the yield and quality of durum winter wheat grain. The long-term application of nitrogen, nitrogen-potassium, nitrogen-phosphorus and nitrogen-phosphorus-potassium systems in the field crop rotation has a strong impact on the formation of durum winter wheat yield. Long-term use of N150P60K80 increases it from 3.6 t ha-1 up to 4.9 t ha-1 (p≤0.05). The use of half a dose of complete mineral fertilizer provides 4.5 t ha-1 (p≤0.05). Variants with incomplete return of phosphoruspotassium fertilizers, as well as paired combinations with a nitrogen component, provide the formation of 4.6–4.8 t ha-1 grains. Nitrogen fertilization systems increase grain yield to 4.2–4.5 t ha-1 depending on the fertilizer dose. It should be noted that durum winter wheat responds well to the use of nitrogen fertilizers, as the protein content increases from 13.3 to 14.8–15.9 % (p≤0.05), and the gluten content from 28.0 to 31.1–33.4% (p≤0.05) depending on the fertilization system. The protein content was most affected by the application of nitrogen component from complete mineral fertilizer.
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Nivethithan, T., and KAPM Ariyawansha. "Identification of Potential Minerals/Rocks in Sri Lankan Geological Terrain as Source of Potassium (K) Fertilizer." In International Symposium on Earth Resources Management & Environment. Department of Earth Resources Engineering, University of Moratuwa, Sri Lanka, 2022. http://dx.doi.org/10.31705/iserme.2022.7.

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Due to the agricultural intensification in Sri Lanka, there is a high demand for potassium (K)-fertilizer inputs. However, in the Sri Lankan geological setting, the presence of major potash sources is minimum though the K- bearing minerals and rocks are abundant. Therefore, exploration of K-bearing mineral deposits is essential to cater the demand of K-fertilizer in the country. In this regard, this research is focused on investigating the K-bearing minerals and rocks in Sri Lankan geological terrain which can be used as K-fertilizers directly or as alternatives for currently available K-fertilizers. During sample collection, K-bearing minerals, such as feldspar and mica and K-bearing gneiss rock samples were collected from Matale, Kaikawala and Kadugannawa areas. Processed samples were subjected to analyse major oxide concentrations and K concentrations and surface topography. Analyses revealed that the highest actual potassium concentrations were presented in orthoclase feldspar (10.35 w/w%) and then biotite mica (9.95 w/w%) whereas other rocks showed the lowest. Based on the results, biotite mica (Kaikawala) and biotite gneiss (Matale) displayed the highest potential for K recovery, whilst the least potential for K recovery was shown in orthoclase feldspar (Kaikawala). However, further studies are recommended to develop this K-fertilizer and to assess whether its application is economically viable.
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Kuzmenko, N. N. "COMPARATIVE EFFICIENCY OF DIFFERENT DOSES OF FERTILIZERS WHEN CULTIVATING FIBER FLAX." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. DSTU-PRINT, 2020. http://dx.doi.org/10.23947/interagro.2020.1.633-636.

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When cultivating fiber flax, it is recommended to calculate the doses of fertilizers for the main application by compensating for their removal by the crop. On sod-podzolic medium-loamy soil with mobile phosphorus content from high to very high, low and medium potassium content, phosphorus must be compensated by 100% due to fertilizers, and potassium-by 120 %. The optimal dose is N15P22K80. Fiber flax
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Vorobieva, L. A. "Effects of mineral fertilizers on the productivity and quality of white lupine cultivated on soils contaminated with radionuclides." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-100.

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The article presents the results of studies carried out on the experimental field of the Novozybkovskaya SCHOS, on sod-podzolic sandy soil contaminated with radionuclides, to study the effectiveness of doses of phosphorus-potassium fertilizers on yield, radiocaesium accumulation and energy value of white lupine. The research results showed that the optimal doses of phosphorus-potassium fertilizers to obtain increased productivity of green mass of lupine - P45K120 and grain - P45K150, to reduce the accumulation of 137Cs in green mass - P45K150, in grain - P45K210.
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Mnatsakanyan, A. A., G. V. Chuvarleeva, and A. S. Volkova. "“Nanosilicon” and productivity of corn for grain under the conditions of the central zone of the Krasnodar region." In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-34.

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This article describes the effect of various doses of mineral fertilizers with trace elements based on pure silicon – “Nanosilicon” on corn plants. It is important to point out that new and perfect varieties are created every year, although, without the use of fertilizers, they will not be able to give the maximum yield. The main nutrients are nitrogen, phosphorus and potassium, often forgetting silicon, even though it also plays an important role in growth and development, as well as in the crop yield; in this research, we studied corn in the central zone of the Krasnodar Territory. Fertilizer “Nanosilicon” increased the height of corn plants by an average of 17 cm or 9.9 %; wet weight by 100.4 g/plant or 17.5 %; yield, as one of the main indicators, by 7.68 kg/ha or 15.4 %.
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Pašić, Sanid, and Dževad Lavić. "PRINOS SALATE „SHANGORE“ UZ UPOTREBU RAZLIČITIH NAČINA ISHRANE I NASTIRANJA ZEMLJIŠTA." In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.149p.

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The paper presents the basic characteristics and prerequisites for improving the production of butter lettuce "Shangore" in order to obtain guidelines in the application of lettuce cultivation technology, stable yield, increased nutritional value and uniform quality. Fertilization treatments in the experiment included: phosphate-based mineral fertilizer, humic acid-based organic fertilizer, and liquid organic-mineral fertilizer. The results of this research indicate that the average value of lettuce yield was the highest in the application of fertilizers with potassium phosphate and the application of mulch combination PE - black foil and agrotextiles and amounted to 45,997 kg / ha in 2021. The lowest yield of lettuce was registered in the control variant and amounted to 22,487 kg / ha in 2020.
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Reports on the topic "Potassium fertilizers"

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Shtienberg, Dan, William Fry, Amos Dinoor, Thomas Zitter, and Uzi Kafkafi. Reduction in Pesticide Use in Plant Disease Control by Integration of Chemical and Non-Chemical Factors. United States Department of Agriculture, May 1995. http://dx.doi.org/10.32747/1995.7613027.bard.

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The long term goal of this research project was to improve control efficiency of Alternaria diseases while reducing fungicide use, by integration of chemical and non-chemical factors. Non-chemical factors were genotype resistance, age-related resistance and fertilizers. The Specific objectives were: 1) To quantify changes in resistance among genotypes and over time in terms of disease development and specific phases of the disease cycle; 2) To quantify the effects of fertilizers applied to the foliage alone, or in combination with a fungicide, on disease development; 3) To quantify the relative contribution of genotype resistance, age-related resistance and fungicide type to the reduction of disease development; 4) To develop a strategy for integration of chemical and non-chemical factors which will achieve optimal disease suppression. The influence of physiological age of cotton plants and of the individual leaves, on disease incidence and on the rate of lesion expansion of A. macrospora was examined on leaves sampled from the field. Both parameters increased with the physiological age of individual leaves but were not affected by the age of the whole plant. The hypothesis that enrichment of the foliage with nitrogen and potassium may enhance host resistance to Alternaria and thus reduce disease severity, was examined for potato and tomato (A. solani ) and for cotton (A. macrospora ). Under controlled environment conditions, application of urea or KNO3 resulted in some reduction in disease development; however, foliar application of both nutrients (8-10 sprays in total) did not affect Alternaria severity in the field. Systemic fungicides against Alternaria (e.g. , tebuconazole and difenoconazole) are more effective than the commonly used protectant fungicides (e.g. mancozeb and chlorothalonil). Concepts for the integration of genotype resistance, age-related resistances and fungicide for the suppression of Alternaria diseases were developed and evaluated. It was found that reduction in host resistance, with age and among genotypes, can be compensated for by adjusting the intensity of fungicide applications, i.e. by increasing the frequency of sprays and by spraying systemic fungicides towards the end of the season. In, moderately resistant cultivars protection can be achieved by spraying at longer intervals than susceptible cultivars. The concepts for integration were evaluated in field trials for cotton, potatoes and tomatoes. By following these concepts it was possible to save up to five sprays out of 8-10 in a growing season.
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Mallarino, Antonio P., Ryan R. Oltmans, and Nicholas Piekema. Potassium Fertilizer Effects on Yield of Corn and Soybean and on Potassium Uptake and Recycling to the Soil. Ames: Iowa State University, Digital Repository, 2013. http://dx.doi.org/10.31274/farmprogressreports-180814-291.

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Helms, Alex. Effect of Potassium Fertilizer in a No-Till Corn and Soybean Rotation with very low Soil Test Potassium. Ames (Iowa): Iowa State University, January 2021. http://dx.doi.org/10.31274/cc-20240624-586.

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Mallarino, Antonio P., Bernard J. Havlovic, and Jeff Butler. Phosphorus and Potassium Fertilizer Placement for Corn and Soybeans Managed with No-till and Chisel-Disk Tillage. Ames: Iowa State University, Digital Repository, 2004. http://dx.doi.org/10.31274/farmprogressreports-180814-2625.

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Mallarino, Antonio P., Bernard J. Havlovic, and Jeff Butler. Phosphorus and Potassium Fertilizer Placement for Corn and Soybeans Managed with No-Till and Chisel-Disk Tillage. Ames: Iowa State University, Digital Repository, 2006. http://dx.doi.org/10.31274/farmprogressreports-180814-445.

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Mallarino, Antonio P., and David Haden. Phosphorus and Potassium Fertilizer Placement for Corn and Soybeans Managed with No-till and Chisel-Disk Tillage. Ames: Iowa State University, Digital Repository, 2004. http://dx.doi.org/10.31274/farmprogressreports-180814-6.

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Randolph, A. D., and T. M. Kwon. Regeneration of FGD waste liquors: Production of ammonium and potassium sulfate mixed fertilizer. Quarterly technical report, April 1993--June 1993. Office of Scientific and Technical Information (OSTI), December 1993. http://dx.doi.org/10.2172/10195353.

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Randolph, A. D., and T. M. Kwon. Regeneration of FGD waste liquors: Production of ammonium and potassium sulfate mixed fertilizer. Quarterly technical report, July 1993--September 1993. Office of Scientific and Technical Information (OSTI), December 1993. http://dx.doi.org/10.2172/10195358.

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Randolph, A. D. Regeneration of FGD waste liquors: Production of ammonium and potassium sulfate mixed fertilizer. Quarterly technical report, October 1993--December 1993. Office of Scientific and Technical Information (OSTI), December 1993. http://dx.doi.org/10.2172/283636.

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