|Aiken, R - KANSAS STATE UNIVERSITY|
Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 27, 1999
Publication Date: September 1, 1999
Technical Abstract: This study was conducted to quantify winter wheat and proso millet yield reductions following sunflower. Eight crop rotations were established at Akron, CO in 1990 and evaluated for yield, available soil water at planting, and crop water use in 1995, 1996, and 1997. In dry years, rotations with sunflower as the previous crop had lower wheat and millet water use than other rotations, but averaged over three years, there was n effect of sunflower on wheat or millet water use. Average wheat yield in a W-Sun-F rotation was about 30% lower than wheat yield from W-C-Sun-F, W-M- Sun-F, W-C-F, and W-F. Average millet yield in a M-Sun rotation was 43% lower than millet yield from M-W-C. Wheat yield declined by 178.5 lb/a (3 bu/a) for each inch decline in available soil water at planting. Millet yield declined by 295.6 lb/a for each inch decline in available soil water at planting. NOTE: IF INFORMATION IS PATENTABLE, DO NOT ENTER INTERPRETATIVE SUMMARY EVER, AN EXPLANATION IS REQUIRED.