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Letteratura scientifica selezionata sul tema "Sprinkler irrigaton"

Autore: Grafiati

Pubblicato: 29 luglio 2024

Ultima modifica: 30 luglio 2024

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Articoli di riviste sul tema "Sprinkler irrigaton"

1

Griffin, Ronald C., M. Edward Rister, Michael R. Parker e Garry N. McCauley. "Economic Prospects for Sprinkle Irrigating Rice in Texas". Journal of Agricultural and Applied Economics 20, n. 1 (luglio 1988): 103–17. http://dx.doi.org/10.1017/s0081305200025693.

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AbstractThe economic feasibility of investing in sprinkler irrigation technology for rice production is investigated using linear programming and capital budgeting to identify the net annual benefits and net present value, respectively. Groundwater and both flat rate and volumetrically priced surface water sources of irrigation water are analyzed. Under typical practices occurring in rice production operations in the Texas Rice Belt, sprinkler irrigation technology is not profitable at current water costs. Producers using volumetrically priced surface water have the greatest incentive to consider sprinkler irrigation, but water prices must increase by over 250 percent for the investment in a sprinkler irrigation system to become attractive. Yield reductions associated with sprinkle-irrigated rice are a significant disincentive. For equivalent flood- and sprinkle-irrigated rice yields, an increase in water prices of over 175 percent is required before the investment in a sprinkler irrigation system becomes economically feasible.

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2

CHERNYKH, A. G. "DETERMINATION OF THE VELOCITY AND FLOW RATE OF THE AEROSOL JET IN CIRCULAR SELF-PROPELLED SPRINKLERS". Elektrotekhnologii i elektrooborudovanie v APK 71, n. 2 (2024): 59–69. http://dx.doi.org/10.22314/2658-4859-2024-71-2-59-69.

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Circular self-propelled sprinkler systems are highly efficient equipment for watering crops by sprinkling. Considering the diameter of irrigation, uniformity and productivity of the installation largely depend on the parameters and relative location of sprinklers on the main pipeline of the sprinkler machine, the assessment of the parameters of artificial rain for compliance with the set values for irrigation conditions requires appropriate theoretical and practical studies. (Research purpose) The research purpose is to theoretically calculate and experimentally confirm the results obtained characterizing the speed and performance of the aerosol jet at the outlet of the sprinkler in the fine sprinkling system, in relation to the main pipeline of the self-propelled sprinkler. (Materials and methods) The ballistic theory of the motion of droplets in the air in the Frene-Serre coordinate system perpendicular to the irrigation plane was used to construct a mathematical model of the motion of an aerosol jet. A set of sprinklers located on the main pipeline of a wide-scope circular sprinkler machine of the T-L Irrigation company was considered as an object of research. (Results and discussion) A mathematical model has been proposed for calculating the movement of an aerosol sprinkler jet in the air, which makes it possible to bring the volume flow rate of the sprinkler to an equivalent diameter and wetting depth in the irrigation plane. It has been shown that the data obtained make it possible to predict for a given set of sprinklers the depth of irrigation per unit of irrigated surface in the plane of the figure formed by two circles determined by the circular motion of two adjacent support trolleys of the machine. (Conclusions) It was determined that in order to bring the uniformity coefficient of circular sprinklers to a normalized value, when compiling appropriate mathematical models of the irrigation process, further adaptation of the movement of a single drop in the air to the parameters of artificial rain formed by the spray jet of the sprinkler is required.

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3

Kozinskaya, O. V., M. A. Denisova, V. S. Bocharnikov, O. V. Bocharnikova, N. V. Kuznetsova, T V Repenko e M. P. Meshcheryakov. "Studying waters of the Volgo-Don canal for the purpose of irrigation". IOP Conference Series: Earth and Environmental Science 996, n. 1 (1 febbraio 2022): 012009. http://dx.doi.org/10.1088/1755-1315/996/1/012009.

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Abstract The data on the quality of water for irrigation and measures to improve the uniformity of distribution of artificial rain along the water pipeline of the sprinkler in order to increase the quality of irrigation are given. It has been established that the uniformity of irrigation is affected by the quality of water, in particular the presence of small particles and impurities in it, which clog the sprinklers, leading to the cessation of water supply to the irrigated area. Plants do not get enough moisture, resulting in lower yields. Studies on the uniformity of the distribution of the rain layer when irrigating with the Don-K sprinkler showed that after the installation of a water purification system in front of the water pipeline input, a more uniform distribution of rain was observed along the water-conducting belt of the farm. The content of undissolved impurities decreased by a factor of 10, and the irrigation rate increased by 15%.

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R.P. JANGIR B.L. JAT e M.S. RATHORE. "Comparative efficacy of sprinkler and surface methods of irrigation in cumin (Cuminum cyminum) under arid western Rajasthan conditions". Indian Journal of Agronomy 52, n. 1 (10 ottobre 2001): 83–85. http://dx.doi.org/10.59797/ija.v52i1.4898.

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A field study was undertaken during winter seasons of 2002-03 and 2003-04 at Mandor-Jodhpur to compare the efficacy of sprinkler method of irrigation with conventional check-basin method and to work out an appropri- ate irrigation schedule and the operating time for sprinklers. The pooled results revealed that application of five irrigations through sprinklers operated for 3 hr produced seed yield (41 1 kg/ha) on a par with that of recom- mended irrigation schedule applied through conventional irrigation method, but it saved water up to 41 per cent with higher WUE (0.260 kg seed/m3) and net returns (Rs 16,558Iha). Further increase in irrigation frequency (six irrigations) did not cause significant impact on cumin productivity and net returns.

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Feibert, Erik B. G., Clinton C. Shock e Lamont D. Saunders. "A Comparison of Onion Production Under Sprinkler, Subsurface Drip, and Furrow Irrigation". HortScience 30, n. 4 (luglio 1995): 839A—839. http://dx.doi.org/10.21273/hortsci.30.4.839a.

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Onion yield and grade were compared under sprinkler, subsurface drip, and furrow irrigation in 1992, 1993, and 1994. Furrow-irrigated onions were planted on two double rows on 1.12-m-wide beds at 352,000 seeds/ha. Sprinkler- and drip-irrigated onions were planted in nine single rows on a 2.24-m-wide bed at 432,100 seeds/acre. Drip plots had three drip lines buried 0.10 m deep in each 2.24-m bed. Soil water potential at 0.2-m depth was measured by tensiometers and granular matrix sensors (Watermark Model 200SS, Irrometer Co., Riverside, Calif.). Furrow irrigations were started when the soil water potential at the 0.2-m depth reached –25 kPa. Drip-irrigated onions had soil water potential at the 0.2-m depth kept wetter than –25 kPa by daily replacement of crop evapotranspiration (Etc). Sprinkler irrigations were started when the accumulated Etc reached 25 mm. Sprinkler irrigation resulted in significantly higher onion yield than furrow irrigation in 1993 and 1994. Sprinkler irrigation resulted in higher marketable onion yield than furrow irrigation in 1993. Drip irrigation resulted in significantly higher onion yield than furrow irrigation every year. Drip irrigation resulted in higher marketable onion yield than furrow irrigation in 1992 and 1994. Marketable onion yield was reduced in 1993 due to rot during storage.

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Oliveira, Gabriel Q. de, Adriano S. Lopes, Leandro H. Jung, Norton H. Rego e Jean C. L. de Oliveira. "Initial development of two eucalyptus hybrid submitted to irrigation". Engenharia Agrícola 33, n. 6 (dicembre 2013): 1099–109. http://dx.doi.org/10.1590/s0100-69162013000600003.

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The eucalyptus offers several advantages compared to other forestry species and, by using the irrigation can increase productivity and decrease production time. The objective of the present study was to evaluate two hybrid eucalyptus (Grancam and Urograndis), no irrigation, dripping and micro sprinkler irrigated at 90, 120, 150 and 180 days after transplanting (DAT). The experiment was conducted at the experimental irrigation area in the State University of Mato Grosso do Sul, in the municipality of Aquidauna - State of MS, Brazil. The experimental design was randomized blocks, split plot with four blocks and two replications within each block, and the plots were composed by irrigation treatments (dripping, micro sprinkler irrigate and dry) and the subplots the hybrids (Grancam and Urograndis).The total area of the experiment had 3 hectares, where each plot consisted of 1 ha. It was evaluated plant height, stem diameter and canopy, stem basal area, the relationship between height and stem diameter, the relationship between height and canopy diameter and stem volume. Data were subjected to analysis of variance and compared by Tukey test at 5% probability. Irrigation systems and dripping sprinkle provide greater plant height, stem diameter, canopy diameter, stem basal area and stem volume.

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Ogbuchiekwe, Edmund J., e Milton E. McGiffen. "Efficacy and Economic Value of Weed Control for Drip and Sprinkler Irrigated Celery". HortScience 36, n. 7 (dicembre 2001): 1278–82. http://dx.doi.org/10.21273/hortsci.36.7.1278.

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Economic analyses compared the returns of weed control methods for drip and sprinkler irrigated celery (Apium graveolens L. `Sonora'). The nine treatments included an untreated control, cultivation as needed for weed control, a pre-emergent herbicide (trifluralin), and six post-emergent herbicides. The effect of each treatment on weed control, yield, crop value, cost of control, costs for additional hand-weeding, net return, and dollar investment (marginal rate of return) was determined. The treatments that reduced weed populations under drip and sprinkler irrigation also increased yield, net returns, and rate of returns. Effective weed control reduced the additional costs of hand-hoeing the weeds not killed by herbicides, resulting in greater net return. The net returns of weed control were even greater when celery was drip irrigated than when sprinklers were used. In 1998, the sprinkler irrigated field returned $1148 to $3921/ha, compared with -$5984 for the untreated control. Net returns for drip irrigation were much higher, ranging from $3904 to $9187/ha compared with -$8320 for the untreated control. Net returns were also higher in 1999, ranging from $2466 to $5389 when weeds were controlled compared with a net loss of $5710 for the untreated control in the sprinkler irrigated field. The returns on the drip-irrigated field were much higher, from $6481 to $8920 when weeds were controlled, compared with -$8046 for the untreated control. The associated returns for every dollar invested (marginal rate of return) in the non-dominated treatment (more return and lower cost) ranged from 52% to 156% for sprinkler irrigation, and 59% to 144% for drip irrigation in 1998. In 1999, the rate of return for each dollar invested ranged from 104% to 324% for sprinkler and 2.4% to 321% for drip irrigated fields.

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8

Prado, Giuliani, Alberto Colombo e Antônio C. Barreto. "Water distribution model for center pivot end gun sprinklers". Revista Brasileira de Engenharia Agrícola e Ambiental 23, n. 7 (luglio 2019): 477–83. http://dx.doi.org/10.1590/1807-1929/agriambi.v23n7p477-483.

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ABSTRACT End gun sprinklers can increase the irrigated area by center pivot irrigation systems without a substantial investment. This study was carried out at the Universidade Federal de Lavras, MG state, Brazil, and aimed to describe and validate a water distribution model for center pivot end gun sprinklers. The gun sprinkler PLONA-RL250®, attached at the end point of a center pivot, was used to evaluate the model in field tests. The sprinkler working conditions considered were nozzle diameters of 14 x 6 mm, working pressure of 292 kPa, and four asymmetric wetted angle adjustments (95 + 20º; 90 + 90º; 60 + 60º; 45 + 45º). These tests were carried out for wind speed lower than 0.9 m s-1. The measured and simulated irrigation depths showed an average absolute difference of 0.65 mm and determination coefficients from 71.55 to 89.37%. Based on the confidence coefficient (c = 0.82) the model can be classified as very good (0.76 ≤ c ≤ 0.85). Sprinkler wetted angle adjustment of 110º (95 + 20º) resulted in uniform water distribution and, for effective radius of throw between 70 to 90% of the gun sprinkler´s radius of throw, this working condition resulted in Christiansen’s uniformity greater than 80%.

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Souza, Elves Almeida, Eugênio Ferreira Coelho, Marcelo Rocha Santos e Diego Magalhães Melo. "Agronomic performance of ‘BRS Princesa’ banana under fertigation and mulching". Semina: Ciências Agrárias 42, n. 3 (19 marzo 2021): 979–98. http://dx.doi.org/10.5433/1679-0359.2021v42n3p979.

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Banana is one of the most produced fruit crops in Brazil and has great economic, social and nutritional importance. Factors such as water availability and well-managed fertilization are fundamental to achieving profitable yields. The aim of this study was to examine the agronomic performance and water use efficiency of ‘BRS Princesa’ banana under combinations of irrigation systems, fertilization methods and mulching, during three production cycles. The experiment was laid out in a randomized-block design with four replicates. Treatments consisted of a combination of the localized irrigation system, fertilization strategy and mulching, as follows: Drip irrigation with manual fertilization; Micro-sprinkler irrigation with manual fertilization; Drip fertigation with mulch; Drip fertigation without mulch; Micro-sprinkler fertigation with mulch; and Micro-sprinkler fertigation without mulch. The plants were irrigated every three days, using three 4-L h-1 drippers per plant or a 64-L h-1 micro-sprinkler for every four plants. The following variables were analyzed: number of leaves, plant height, pseudostem circumference, number of hands, hand yield, water and nutrient (nitrogen and potassium) use efficiency and earliness. The micro-sprinkler system provided a greater pseudostem circumference without the presence of mulch. Plants under micro-sprinkler fertigation with mulching grew taller. The banana yield was higher when fertigation was used than with manual fertilization, regardless of the irrigation system. Plants grown in mulched soil were more productive than those grown in bare soil. The use of mulch increased water, nitrogen and potassium use efficiency when compared with cultivation in bare soil. Drip-irrigated plants showed earlier production than those irrigated with micro-sprinklers.

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Evett, Steven R., Gary W. Marek, Paul D. Colaizzi, David Brauer e Terry A. Howell. "Are Crop Coefficients for SDI Different from Those for Sprinkler Irrigation Application?" Transactions of the ASABE 63, n. 5 (2020): 1233–42. http://dx.doi.org/10.13031/trans.13920.

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HighlightsCrop coefficients for SDI scheduling for grain corn should be reduced by ~10% from those used for sprinkler irrigation.FAO 56 methods to calculate crop coefficients for surface drip irrigation under full-cover plastic mulch were applicable to SDI.A recent drought-resistant corn hybrid appeared to begin rapid leaf area development about 10 days earlier than older hybrids.A recent drought-resistant corn hybrid appeared to finish earlier than older hybrids by about 15 days.Abstract. Subsurface drip irrigation (SDI) has become an important irrigation application method in the U.S. Southern High Plains where pan evaporation exceeds 2,400 mm per year. Early research comparing SDI with spray sprinklers showed that SDI was over-applied when scheduling irrigations using crop coefficients developed using sprinkler irrigation. Thus, crop coefficients developed using SDI may be smaller than those developed using sprinkler irrigation. Grain corn was grown for two years on large, precision weighing lysimeters at Bushland, Texas, with two lysimeters irrigated by SDI and two by mid-elevation spray (MESA) irrigation. Data used in this study were for fields irrigated to replenish soil water in the top 1.5 m of the soil to field capacity, as indicated by weekly neutron probe readings (100% replenishment). Crop coefficients developed for SDI (Kc_SDI) were compared with those developed for MESA (Kc_MESA) using ASCE standardized reference ET equations. The value of Kc_SDI ranged from 0.83 to 0.89 of Kc_MESA for the two years. Values of Kc_SDI remained consistently less than Kc_MESA even after maximum leaf area index was reached, indicating that considerable evaporative loss from the soil surface occurred with MESA irrigation even after full canopy cover. When we shortened the initial period after planting from 30 to 20 d and followed FAO 56 recommendations for surface drip irrigation under full-cover plastic mulch, we calculated basal Kc (Kcb) values (ETo basis) that were reasonably close to our Kc values for SDI for the crop development and early mid-season periods but were greater than our data for the later mid-season and late season periods. Keywords: Crop coefficient, FAO56, MESA, SDI, Sprinkler irrigation, Subsurface drip irrigation.

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Più fonti

Tesi sul tema "Sprinkler irrigaton"

1

Roth, R. L., e B. R. Gardner. "Vegetable Research Under Sprinkler Irrigation". College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214110.

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Gardner, B. R., e R. L. Roth. "Asparagus Production Under Sprinkler Irrigation". College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214133.

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Anwar, Arif Aziz. "Correction factors for sprinkler laterals". Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324845.

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4

Zittlosen, Russell Howard. "ESTABLISHMENT OF DIRECTLY SEEDED GUAYULE USING SPRINKLER IRRIGATION". Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275366.

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5

Grose, Daniel J. "Mathematical modelling and simulation of irrigation sprinklers". Thesis, Cranfield University, 1999. http://dspace.lib.cranfield.ac.uk/handle/1826/9603.

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A set of equations suitable for describing the dynamics of a liquid droplet - gas mixture (spray) have been developed. The equations are arrived at by considering the spray as a multiphase continuum within which the gas and droplets of different sizes constitute individual phases. By ignoring droplet-droplet interactions and considering the gas phase as an inviscid fluid a simplified form of the equations of motion has been arrived at. The equations are considered in one dimension and used to describe the dynamics of the interior of spray produced by a large or medium scale irrigation sprinkler. When combined with data representing the distribution of droplet diameters within the spray this model can be used to predict the water application produced by a sprinkler operating in windy conditions. Such simulations have been undertaken to predict the water application from static sprinklers and the results validated by comparison with data obtained experimentally. A simulation methodology is used to determine the uniformity of water application produced by a travelling sprinkler. By considering the results of large number of simulations produced using meteorological data spanning several years the manner in which the simulation can be used for determining optimum irrigation practice is demonstrated. A simple model has been developed for predicting the water application from a travelling sprinkler operating in still air. The model can be used for obtaining first approximations to optimum operating conditions and provides a means for easily quantifying the performance of a given sprinkler. Further use of the model may be made for aiding in the design and control of irrigation sprinklers.

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Tickes, Barry. "Evaluation of Kerb Applied by Sprinkler Irrigation to Lettuce". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/214975.

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Three tests were conducted to compare delayed applications of Kerb applied by air with those applied through the sprinklers. Early (6-5-02) season and mid (10-20-02) applications made through the sprinklers were significantly more effective than those applied by air. The late season (11-17-02) application was made too early and the weed control was poor demonstrating the need for proper timing regardless of the application technique. It was concluded that chemigation can be an effective technique for making delayed applications of Kerb to lettuce in the low deserts.

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Malik, Manzoor Ahmad. "Evaluation of infiltration into freshly tilled soils under sprinkler irrigation". Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283905.

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Kilaka, Eric Kisambuli. "The effects of windbreaks on the effectiveness of sprinkler irrigation systems". Thesis, University of Canterbury. Waterways Centre for Freshwater Management, 2015. http://hdl.handle.net/10092/10420.

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In the Canterbury region, New Zealand, water is a contentious issue when irrigation and dairy farming are involved. The Canterbury region accounts for 70% of the total irrigated land area in New Zealand and is one of the most productive agricultural regions. Traditionally, water has been seen as an abundant resource, but growing water demands are now outstripping the supply of water, hence threatening the sustainability of agricultural productivity. In the long term, this problem may worsen as a result of climate change, which is predicted to increase water demands and reduce supply in many parts of Canterbury. In the recent and on-going expansion of irrigation systems, modern sprinkler irrigation methods, namely centre pivot and lateral spray irrigation technology, have replaced the old border-dyke systems. This has been due to the need to increase irrigation flexibility and efficiency to guarantee pasture growth for dairy production in dry periods. This conversion has resulted in a reduction of windbreaks to 2 m heights or sometimes led to 100% removal of windbreaks so as to accommodate centre pivot or linear move irrigation systems. Removal of windbreaks or reduction of windbreak height may increase wind speed across a field. Both spray evaporation loss and evapotranspiration are a function of wind speed. Hence, any increase in wind speed may lead to an increase in irrigation requirements. There is little information currently available on outlining how reduction of windbreak height or the complete removal of windbreaks affects efficiency in water application. Thus, this research was done to quantify the effects of windbreaks on water savings under sprinkler irrigation systems in the Canterbury region under various climatic conditions. The research was done in three major steps: (1) spray evaporation loss (SEL)was measured under various climatic conditions for two typical spray nozzles(Nelson Irrigation Corporation Rotator R3000 and Spinner S3000 nozzles) to develop SEL prediction models; (2) wind speed reduction behind windbreaks was quantified for fields under various wind conditions; and (3) the effects of wind speed reduction by windbreaks was modelled for evapotranspiration, spray evaporation loss and irrigation. The results showed that an increase of wind speed, due to the removal of windbreaks or a reduction of height of windbreaks, leads to an increase in evapotranspiration and spray evaporation losses in irrigated agriculture. For the size of the fields considered in this study which are 80 m by 80 m (Site 1 with medium porosity windbreaks) and 120 m by 120 m (Site 2 with low porosity windbreaks), extra irrigation water of up to 14% is needed in one growing season when windbreaks are reduced to 2 m in height. When windbreaks are completely removed from the field, extra irrigation water of up to 38% and 64% is needed when irrigating using the Rotator R3000 nozzle and the Spinner S3000 nozzle, respectively. Thus, reduction of water resource use can be achieved in irrigated agriculture if irrigation systems can be designed to operate under existing windbreaks. Other savings can follow, from reduced requirements for pumping, fuel and labour costs. Lastly, with future climate change projections showing that the Canterbury region will get windier and hotter, windbreaks can help mitigate water losses associated with sprinkler irrigation

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Wilson, Paul, Roger Coupal e William Hart. "An Economic Evaluation of Linear-Move Irrigation Technology". College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/602128.

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Moura, Renata da Silva. "Lâminas de água, inoculação de sementes com Azospirillum brasilense e doses de nitrogênio em arroz terras altas /". Ilha Solteira : [s.n.], 2011. http://hdl.handle.net/11449/98802.

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Orientador: Ricardo Antonio Ferreira Rodrigues
Banca: Orivaldo Arf
Banca: Rita de Cássia Félix Alvarez
Resumo: Os manejos de água e de nitrogênio são importantes para atender adequadamente as necessidades da planta de arroz. Em região com verão chuvoso, o manejo de água é função do regime das precipitações e das irrigações, as quais são realizadas para suprir os períodos de deficiência hídrica. Em relação à necessidade por nitrogênio, o mesmo pode ser suprido com aplicação no solo na forma mineral e, também pela utilização de bactérias capazes de fixar o nitrogênio atmosférico ou a combinação dos dois métodos. Por isso, o objetivo deste trabalho foi avaliar o efeito de lâminas de água, inoculação de sementes com Azospirillum brasilense e doses de nitrogênio em cobertura, utilizando como fonte nitrogenada o sulfato de amônio, no desenvolvimento, componentes de produção, produtividade e qualidade industrial de grãos de arroz de terras altas. O delineamento experimental utilizado foi o de blocos casualizados, em esquema fatorial 2 x 2 x 5, com quatro repetições. Os tratamentos consistiram na combinação de lâminas de água (irrigado + precipitação pluvial e não irrigado + precipitação pluvial), da inoculação das sementes (não inoculado e inoculado) e da adubação nitrogenada em cobertura (0, 25, 50, 75 e 100 kg ha-1 de N). A altura de plantas foi influenciada pelo manejo de água e pelas doses de nitrogênio testadas, mas não ocorreu acamamento de plantas. O manejo de água também influenciou o número de panículas m-2, a fertilidade dos colmos e das espiguetas, teor de nitrogênio na planta, nos grãos e na folha, massa de 100 grãos, massa hectolítrica e produtividade de grãos, além de reduzir o número de dias para o florescimento e a duração do ciclo da cultura. A inoculação das sementes com A. brasilense aumentou o número de colmos e número de panículas por metro quadrado. As doses de N testadas não interferiram na produtividade do arroz de terras altas
Abstract: The water and nitrogen management are important to adequately meet the needs of the rice plant. In the region with a rainy summer, the water management is a function of rainfall and irrigation which are made to meet periods of water stress. The nitrogen can be supplied with application to soil in mineral form and the use of bacteria capable of fixing atmospheric nitrogen or combination of two methods. Therefore, the objective of this study was to evaluate the water levels, seed inoculation with Azospirillum brasilense and nitrogen doses, in cover, in the development, production components, productivity and quality of grain of upland rice. A randomized block design was used in a 2 x 2 x 5 factorial scheme, with four repetitions. The treatments consisted in water levels (irrigation + rainfall and no irrigation + rainfall), seeds inoculation (uninoculated and inoculated) and nitrogen fertilization in cover (0, 25, 50, 75 and 100 kg ha-1 N). The high plants was influenced by water management and nitrogen doses tested, but there was no bedding plants. The water management also influenced number of panicles per square meter, the fertility of stems and spikelets, nitrogen content in plant, grains and leaf, mass of 100 grains, hectoliter weight and grain yield, and reduce the number of the days to flowering and duration of the crop cycle. The seeds inoculation with A. brasilense increased the number of stems and number of panicles per square meter. The nitrogen doses were tested did not interfere in yield of upland rice
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Più fonti

Libri sul tema "Sprinkler irrigaton"

1

Sivanappan, R. K. Sprinkler irrigation. New Delhi: Oxford & IBH, 1987.

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2

Lang, Susan. Garden watering systems. A cura di Sunset Books. Menlo Park, CA: Sunset Books, 1999.

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3

Austin, Richard L. Lawn sprinklers: A do-it-yourself guide. Blue Ridge Summit, Pa: Tab Books, 1990.

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4

Erger, Ken. The homeowner's sprinkler system installation manual. San Diego, CA: Tube Toys, 1986.

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5

Tenn, Michael. How to design and build a sprinkler system: A complete guide for the do-it-yourselfer. Milwaukie, Or: Irrigation Pub., 1997.

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6

Marilyn, Rogers, a cura di. Scotts sprinklers & watering systems: Your handy guide to planning and installing landscape irrigation. Des Moines, IA: Meredith Books, 2007.

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7

Ravikumar, V. Sprinkler and Drip Irrigation. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-2775-1.

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8

Van der Gulik, Ted W., British Columbia. Soils and Engineering Branch. e Irrigation Industry Association of British Columbia., a cura di. B.C. sprinkler irrigation manual. Vernon: Irrigation Industry Association of British Columbia, 1988.

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9

National Seminar on Sprinkler Irrigation in India (1995 New Delhi, India). Sprinkler irrigation in India. New Delhi: Indian National Committee on Irrigation and Drainage, 1998.

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10

Van der Gulik, T. W., British Columbia. Ministry of Agriculture and Fisheries. Soils and Engineering Branch., British Columbia Irrigation Committee. e Irrigation Industry Association of British Columbia., a cura di. B.C. Sprinkler irrigation manual. Vernon, B.C: Irrigation Industry Association of British Columbia, 1989.

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Più fonti

Capitoli di libri sul tema "Sprinkler irrigaton"

1

Albaji, Mohammad. "Sprinkler irrigation". In Introduction to Water Engineering, Hydrology, and Irrigation, 187–98. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003293507-13.

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2

Gilley, James R. "Sprinkler Irrigation Systems". In Sustainability of Irrigated Agriculture, 291–307. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8700-6_17.

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3

Waller, Peter, e Muluneh Yitayew. "Agricultural Sprinkler Irrigation". In Irrigation and Drainage Engineering, 243–58. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-05699-9_14.

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4

Christiansen, Jerald E., e John R. Davis. "Sprinkler Irrigation Systems". In Irrigation of Agricultural Lands, 885–904. Madison, WI, USA: American Society of Agronomy, 2015. http://dx.doi.org/10.2134/agronmonogr11.c49.

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5

Coles, Neil A., Mark R. Rivers e Saeid Eslamian. "Sprinkler Irrigation Systems". In Handbook of Irrigation Hydrology and Management, 113–39. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9780429290152-9.

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6

Waller, Peter, e Muluneh Yitayew. "Turf Sprinkler Irrigation Systems". In Irrigation and Drainage Engineering, 229–41. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-05699-9_13.

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7

Keller, Jack, e Ron D. Bliesner. "Traveling Sprinkler System Design". In Sprinkle and Trickle Irrigation, 274–306. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-1425-8_13.

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8

Keller, Jack, e Ron D. Bliesner. "Set Sprinkler Lateral Design". In Sprinkle and Trickle Irrigation, 174–200. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-1425-8_9.

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9

Ravikumar, V. "Layout of Sprinkler Systems". In Sprinkler and Drip Irrigation, 47–57. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2775-1_3.

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10

Ravikumar, V. "Drip Irrigation Components". In Sprinkler and Drip Irrigation, 151–213. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2775-1_7.

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Atti di convegni sul tema "Sprinkler irrigaton"

1

Zhu, Xingye, Shouqi Yuan, Jianrui Liu, Xinkun Wang e Bin Cai. "Theoretical and Experimental Study on Device Characteristics of Sprinkler Irrigation System". In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30299.

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Abstract (sommario):

The resistance loss of sprinkler irrigation system is an important parameter, it has significance and practical value for studying its device characteristics. In this study, according to the selected materials and setting modes, both the pressure drop along the pipe and the local resistance loss were calculated out. The theoretical device characteristics of one sprinkler irrigation system was analyzed. A calculating schema has been carried out in order to apply the method to any sprinkling system. Experimental study was carried out for this system. Water distribution maps for the sprinklers were drawn using Matrix Laboratory (MATLAB). The hydraulic characteristics were as follow, 7.2, 3.0, 10.0 mm/h was the average, minimum, and maximum irrigated intensity, respectively. It supplied theoretical foundation for the reasonable application of sprinkler irrigation system for the future.

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2

PTACH, Wiesław, Ariel ŁANGOWSKI, Roman ROLBIECKI, Stanisław ROLBIECKI, Barbara JAGOSZ, Vilda GRYBAUSKIENE e Mateusz KOKOSZEWSKI. "THE INFLUENCE OF IRRIGATION ON THE GROWTH OF PAULOWNIA TREES AT THE FIRST YEAR OF CULTIVATION IN A LIGHT SOIL". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.121.

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The field experiment was carried out in 2016 on sandy soil in the forest nursery Białe-Błota (Bydgoszcz Forest Division, Poland). The effect of sprinkler irrigation on the growth Paulownia Shan Tong trees was investigated. The experiment was established as one factorial. The variability factor was the irrigation: S-sprinkler irrigation and C- without irrigation (control). The process included the controls of growth parameters: tree height, trunk diameter, number and surface of leaves. It was found that the sprinkled seedlings of Paulownia Shan Tong were significantly higher than those growing in the non-irrigated plots. The sprinkler irrigation applied in the experiment resulted in an increase in the number of leaves of the Paulownia and their surface area, which resulted in an increase in biomass yield. By analysing the results of the study on trunk diameter, leaf number and surface, it may be stated that irrigation watering significantly influenced the tested parameters. Irrigation significantly increased the height of Paulownia trees. The positive effect of the usage of sprinkler irrigation may indicate the possibility of effective application of this method in the field cultivation of Paulownia Shan Tong.

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3

Motewar, Aditya, Rushikesh Patil, Rohit Khandagale, Dnyaneshwar Bansode e Sandeep S. Wangikar. "Study of Different Positions of Sprinklers for Irrigation System". In National Conference on Relevance of Engineering and Science for Environment and Society. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.118.8.

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The use of sprinkler is becoming prevalent day by day. A sprinkler system should be designed to apply water homogeneously without erosion or runoff. The sprinkler application rate of the system should be harmonized to the infiltration rate of the most restrictive soil in the field. If the application rate exceeds the soil intake rate, the water will run off the field or relocate within the field resulting in over and under watered areas. Three different sprinkler systems for irrigation purpose are proposed in this paper. The three different systems are stating the configuration of the sprinklers as at between 2 rows but on height with 2 sprinklers, on plants at topmost position and on plants at topmost position but 2 sprinklers at position. The comparison based on the eleven points amongst the three configurations along with the traditional sprinkling system is made and further the most suitable configuration of sprinkler system is predicted.

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4

Xu, Yuncheng, Guan Lin e Haijun Yan. "Experimental and Numerical Investigation on the Erosion Wear of an Impact Sprinkler". In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21339.

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In the middle and western China, agricultural irrigation water often contains a high sediment concentration. In order to save the cost, no filtration devices are required for sprinkler irrigation, which results in the wear of sprinkling irrigation equipment, especially on the nozzle. In this study, experiments on the erosion wear of an impact sprinkler (PY1-20sh with aluminum alloy nozzles) were conducted under different conditions of sediment concentration and erosion time. Using the experimental data as boundary conditions, numerical simulations based on the discrete phase model (DPM) were conducted to analyze the wear of the internal surface of the sprinkler’s full flow passage. Based on both experimental and numerical results, the erosion wear mechanism of the internal flow surface was revealed, and prediction model of the nozzle’s wear rate was established, providing the technical guidance for design and operation of the impact sprinkler.

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5

Zhu, Xingye, Xinkun Wang e Junping Liu. "Numerical Simulation of a New Typed Sprinkler Irrigation System". In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-24006.

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It has important significance and practical value for studying Sprinkler Irrigation System. In this study, numerical simulation was carried out. According to the selected materials and setting modes, both the pressure and the velocity distribution along the lateral were calculated out. Experimental study was carried out for this system to verify the correctness of numerical simulation. The following parameters were measured in the experiments: the flow-rate, rotational speed of the pump, and working pressure for the sprinklers. The numerical simulation results agreed to the experimental results within 5 percent. It supplied a foundation for the reasonable application of sprinkler irrigation system for the future. It can be concluded that structural optimization approach can be effectively implement by CFD simulation.

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6

"Sprinklers". In Irrigation Systems Management. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2021. http://dx.doi.org/10.13031/ism.2021.11.

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7

"Moved-Lateral, Gun, and Traveler Sprinkler Systems". In Irrigation Systems Management. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2021. http://dx.doi.org/10.13031/ism.2021.12.

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8

Deshmukh, Manoj J., Akshay A. Kadam e Rohit D. Patil. "Automatic Solar Water Sprinkler". In National Conference on Relevance of Engineering and Science for Environment and Society. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.118.31.

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India is a vast country where water is insufficient availability in some regions. Conservation of water is very much important in agriculture due to the various climatic phenomenon’s. The various alternative modes of irrigation should be adopted to tackle this problem. The developed countries are using several methods to conserve and reuse the water. If we check the fact of water availability on earth, two- third of earth is filled by water but only less than one percent of water can be used for the normal use. This is the point where the preserving of water’s importance is arriving. This type of irrigation reduces water wastage to a large extent. In our project we are accepting the sprinkler mechanism for irrigation. The sprinkler is working by using the double acting pneumatric cylinder, in which on the forward and backward stroke of the cylinder pushes air to the water tank. This air from the cylinder passes the water out of the tank, through the sprinkler. This way make sure proper watering of the crop.

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9

Vitor Miguel Abreu e Luís Santos Pereira. "Sprinkler irrigation systems design using ISADim". In 2002 Chicago, IL July 28-31, 2002. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2002. http://dx.doi.org/10.13031/2013.10438.

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10

Liu Junping, Yuan Shouqi, Li Hong e Zhu Xingye. "Comparative research on hydraulic performance of sprinkler heads in sprinkler irrigation". In 2012 Dallas, Texas, July 29 - August 1, 2012. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2012. http://dx.doi.org/10.13031/2013.42004.

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Rapporti di organizzazioni sul tema "Sprinkler irrigaton"

1

Ben-Hur, Menahem, John Letey e Zvi Plaut. Controlling Runoff on Soils Irrigated by Moving Sprinkler Irrigation Systems. United States Department of Agriculture, febbraio 1992. http://dx.doi.org/10.32747/1992.7603509.bard.

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2

Duranceau, David. Improved Selection Procedures for Irrigation Sprinklers. Office of Scientific and Technical Information (OSTI), febbraio 1990. http://dx.doi.org/10.2172/7250963.

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3

Chou, Frederick. Optimal Real-Time Pump and Irrigation Scheduling for Center-Pivot Sprinkler Systems. Office of Scientific and Technical Information (OSTI), settembre 1988. http://dx.doi.org/10.2172/5425039.

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4

den Braber, Harmen, Saskia Houben, M. Blom-Zandstra e N. P. R. Anten. Irrigation system performance in potato production in Northern Algeria : a case study of the portable sprinkler system. Wageningen: Stichting Wageningen Research, Wageningen Plant Research, Business Unit Plant, 2017. http://dx.doi.org/10.18174/459593.

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5

Water budget and simulation of one-dimensional unsaturated flow for a flood- and a sprinkler-irrigated field near Milford, Utah. US Geological Survey, 1995. http://dx.doi.org/10.3133/wri954072.

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