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- W2186457606 abstract "In arid or semiarid regions such as Castilla-La Mancha (Spain), a sustainable use of water for agriculture should be carried out. Under these conditions it is necessary to use potentially efficient irrigation systems, such as drip and sprinkler irrigation systems. Centre pivots are a very interesting alternative among other sprinkler irrigation systems. In order to obtain the combination that best fits the field conditions (soil, wind, crops, etc.), it is important to determine the behaviour of the different sprinklers and their height above the ground level. The main goal of this work is to characterize the water application process in a centre pivot, above the crop and at soil level, by using two types of sprinklers and two heights above ground level, and studying its effect on onion (Allium cepa L.) yield. The case study has been analyzed during one irrigation season (2008) in a plot irrigated with a central pivot irrigation system, located in Albacete (Spain). In the irrigation system, two repetitions of the most common commercial types of sprinklers in the Region were installed in the centre pivot, Rotating Spray Plate (RotatorTM) and Fixed Spray Plate (LENTM), and each one for two heights above the ground level (1 m and 2.5 m). During the irrigation season several evaluations of irrigation system were performed, obtaining parameters related to the distribution of water above the crop (Christiansen uniformity coefficient, distribution uniformity, etc.). In addition, for each combination of sprinkler and height, crop yield, biomass and harvest index were calculated. In order to monitor the soil moisture, WatermarkTM sensors, which measure soil water potential, together with EnviroScanTM sensors, which measure volumetric soil water content, were installed. Results show that, with the Rotating Spray Plate Sprinklers (RotatorTM), slightly higher irrigation uniformity is obtained for individual irrigation events, mainly for a height of 2.5 m. In relation to soil moisture distribution within the soil, it could be concluded that soil moisture redistribution improves the obtained uniformity coefficient above the crop even when the low application uniformity is maintained in time. Regarding to crop yield, the differences between the several combinations of sprinklers and heights were not statistically significant." @default.
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- W2186457606 date "2010-07-06" @default.
- W2186457606 modified "2023-09-26" @default.
- W2186457606 title "EFFECT OF THE TYPE OF SPRINKLER AND HEIGHT ABOVE THE SOIL ON ONION (ALLIUM CEPA L.) CROP" @default.
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