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Effect of Nitrogen Management on Severely Deficit Subsurface Drip-Irrigated Corn
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: Paper number 131593324, 2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: 10.13031/aim.20131593324) @2013
Authors: Freddie R Lamm, Alan J. Schlegel
Keywords: Microirrigation, corn, nutrient management, irrigation, fertigation, nitrogen management, deficit irrigation
Abstract. Deficit or limited irrigation is becoming a reality in many areas of the Great Plains. A study was conducted at the KSU Northwest Research-Extension Center at Colby, Kansas from 2004 to 2006 to examine the effect of nitrogen application method for severely deficit subsurface drip-irrigated corn. There were no significant differences in corn yields or water productivity between preplant-applied nitrogen and in-season fertigation for severely deficit-irrigated corn. Fertigation tended to establish more kernels per unit area in the drier years (2004 and 2006) when irrigation was limited to 75 mm and also in the wetter year (2005) when increased irrigation (150 mm) allowed for an appreciable increase in overall kernel numbers. Greater kernels/area tended to also increase corn grain yield.
Keywords. Microirrigation, corn, nutrient management, irrigation, fertigation, nitrogen management, deficit irrigation
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