Research Synopsis

Irrigation and Nitrogen Best Management Practices Under Drip Irrigated Vegetable Production.

University of Florida

Michael D. Dukes, Lincoln Zotarelli, Johannes M. S. Scholberg, Rafael Muñoz-Carpena
This study evaluated several water irrigation treatments allowing up to five watering events per day depending on the soil water threshold controller (SMS) for tomato and green bell pepper, as a comparison time based treatments (TIME) of one daily irrigations were established to mimic typical producer practices. SMS control of irrigation resulted in 29%-44% less irrigation water used on tomato and 37%-66% less water used on pepper when compared to TIME treatments. Tomato yield was significantly higher on SMS treatments compared to TIME treatments, but yield was similar across all pepper treatments. SMS treatments increased irrigation water use efficiency 2-3 times compared to TIME treatments on both tomato and pepper. In addition, yields on tomato were significantly higher on the two SMS treatments compared to the TIME treatment. Acclima controllers were 2-3 times more efficient that typical producer practices while producing equal or better crop yields. ASCE EWRI World Water and Environmental Resource Congress May 21-25, 2006, Omaha, NE

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