Friday, 6 January 2006 - 9:45 AM

A Comparative Agronomic Analysis of Subsurface Drip Irrigation and Overhead Irrigation of Cotton Grown in Georgia

Jared Ross Whitaker, Craig Bednarz, Glen Ritchie, Cory I. Mills, and Robert L. Millings. University of Georgia, 2356 Rainwater Rd., Tifton, GA 31793

New irrigation methods are being explored to find ways to save water without losing the benefits of irrigation. Subsurface drip can decrease evaporative water loss in cotton, but it remains to be seen how these savings compare to conventional overhead irrigation. Direct comparison of subsurface drip and overhead irrigation will provide information as to the plausibility of another form of irrigation. This experiment compared subsurface drip and low-pressure sprinkler irrigation in Georgia cotton. Treatments of overhead irrigation, two methods of subsurface drip, and dryland plots were studied. ADCON equipment was installed in at least one replicate in each treatment to monitor soil water potential. The overhead irrigation was watered when the soil water potential reached 40 centibars. One treatment of the subsurface drip was watered with the same amount of water as the overhead when it was watered. Another treatment of the SDI was fed with just enough water to keep the soil water potential below 40 centibars. The dryland received no irrigation. The cotton was machine picked and box picked to compare the quality and yield of each of the irrigation treatments.

[ Recorded presentation ] Recorded presentation

See more of Cotton Physiology Conference - Session A
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See more of The Beltwide Cotton Conferences, January 3-6 2006