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Deficit Irrigation of Cotton in Tennessee

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

Citation:  5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA  IRR10-8525.(doi:10.13031/2013.35859)
Authors:   Brian G Leib, C Owen Gwathmey, Chris L Main
Keywords:   Cotton, Deficit irrigation, Irrigation initiation, irrigation rate

The goal of this research was to determine the level of deficit irrigation that provided the highest economic return for cotton. Drip tape was used to create nine deficit irrigation treatments compared to a rainfed control in a RCB design. Irrigation was initiated at square, bloom, and post-bloom by opening manual valves on the drip lines while irrigation levels were created by different drip tapes that supplied 3.8, 2.5, and 1.3 cm per week. Irrigation amounts were reduced if rainfall supplied the required water. Delta Pine 143 & Phytogen 375 were used on a Memphis silt loam soil at the West Tennessee Research and Education Center, Jackson, TN.

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