IMPROVEMENTS IN WATER USE EFFICIENCY IN IRRIGATED COTTON: CHOICES IN SYSTEMS AND MANAGEMENT
Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1
Abstract                                                                         Back to Table of contents

Major factors (crop, soil, topography, labor and management availability and skill, environmental concerns, regulatory controls, economic) influencing irrigation efficiency, water use efficiency and the choice of appropriate irrigation systems and management for cotton are reviewed and discussed.  One field experiment in the San Joaquin Valley of California which identifies the high yield potential, relatively low water use, and high water use efficiency possible under subsurface drip irrigation is described in detail.  Three different field experiments and grower experiences in evaluating different irrigation systems (furrow versus subsurface drip in all three, center pivots included in one grower evaluation)in terms of water requirements, water use efficiency and potential for minimizing deep percolation are reviewed in the context of options for improving water use efficiency in fully-irrigated cotton under conditions in the western United States.  Drip irrigation is discussed in detail but remains only one of the choices for changes in irrigation systems and management that are available to improve irrigation efficiency and water use efficiency while maintaining a favorable net economic return.

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