Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Crop Production Comparison with Spray, LEPA, and Subsurface Drip Irrigation in the Texas High PlainsPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: 5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA IRR10-9704.(doi:10.13031/2013.35818)Authors: Paul D Colaizzi, Steven R Evett, Terry A Howell, R Louis Baumhardt Keywords: Grain sorghum, soybean, cotton, water use efficiency, Ogallala Aquifer, semiarid Irrigation application method may affect crop yield and water productivity. Crop production was compared for spray, LEPA drag sock, and subsurface drip irrigation (SDI) application methods in the Texas High Plains. Crops included three seasons of grain sorghum, one season of soybean, and four seasons of cotton. Irrigation treatments were 0, 25, 50, 75, and 100% of replacing full crop evapotranspiration, which was measured by neutron probe. For grain sorghum, SDI resulted in the largest grain yield and water use efficiency at the 25 and 50% irrigation treatments, followed by LEPA, but spray outperformed LEPA and SDI at the 75 and 100% treatments. For soybean, the same trend was observed at the 25 and 50% treatments, but SDI performed best at 75%, and spray performed best at 100%. Cotton productivity and gross returns were consistently best for SDI, followed by LEPA, and spray at all irrigation treatments. (Download PDF) (Export to EndNotes)
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