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Various Irrigation Effect of Corn Grain Yield and CERES-Maize Simulation for South Central Kansas

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  032138,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.14013) @2003
Authors:   E. Dogan, Gary A. Clark, Danny H. Rogers, Richard L. Vanderlip
Keywords:   Deficit irrigation, crop model, scheduling

A field study was conducted to evaluate an irrigation scheduling model (KanSched) under deficit sprinkler irrigation applications on seven irrigated corn sites in South Central Kansas from 1999 to 2001. The study sites included a K-State experimental field with a linear move irrigation system and six commercial production fields with center pivot sprinkler systems. The sprinkler packages were modified to apply various irrigation amounts on three portions of the systems. Soil types from the various fields ranged from coarse textured sand to fine textured silt loam. Net irrigation amounts applied to each test zone were measured with three IrriGages (IG10). One IG10 collector was also located at the edge of each commercial site to measure rainfall during the corn growing season. Field yield and water use information was collected. Field results were compared to modeled yields using the CERES-Maize crop model. Field information generally indicated substantial yield loss due to deficit irrigation. CERES-Maize simulations did not mimic measured yields.

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