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Long-term response of corn to limited irrigation and crop rotations

Klocke, N.L. and Payero, J.O. and Schneekloth, J.P. (2007) Long-term response of corn to limited irrigation and crop rotations. Transactions of the ASABE, 50 (6). pp. 2117-2124.

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Publisher URL: http://www.asabe.org/

Abstract

Dwindling water supplies for irrigation are prompting alternative management choices by irrigators. Limited irrigation, where less water is applied than full crop demand, may be a viable approach. Application of limited irrigation to corn was examined in this research. Corn was grown in crop rotations with dryland, limited irrigation, or full irrigation management from 1985 to 1999. Crop rotations included corn following corn (continuous corn), corn following wheat, followed by soybean (wheat-corn-soybean), and corn following soybean (corn-soybean). Full irrigation was managed to meet crop evapotranspiration requirements (ETc). Limited irrigation was managed with a seasonal target of no more than 150 mm applied. Precipitation patterns influenced the outcomes of measured parameters. Dryland yields had the most variation, while fully irrigated yields varied the least. Limited irrigation yields were 80% to 90%> of fully irrigated yields, but the limited irrigation plots received about half the applied water. Grain yields were significantly different among irrigation treatments. Yields were not significantly different among rotation treatments for all years and water treatments. For soil water parameters, more statistical differences were detected among the water management treatments than among the crop rotation treatments. Economic projections of these management practices showed that full irrigation produced the most income if water was available. Limited irrigation increased income significantly from dryland management.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science, Plant Science
Business groups:Agri-Science, Crop and Food Science
Additional Information:© American Society of Agricultural and Biological Engineers.
Keywords:Corn; corn yield; crop rotation; deficit irrigation; evapotranspiration; irrigation; limited irrigation; soil water.
Subjects:Plant culture > Field crops > Grain. Cereals
Plant culture > Irrigation farming
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Deposited On:05 Feb 2009 05:45
Last Modified:25 Oct 2011 04:51

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