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Irrigation Systems

Irrigation Systems and Technologies

Project Plan

ist1303 managing sprinkler irrigation under constraints     

In the News
Final Reports

Completion of Identification of Water-Use Efficient Peanut Genotypes, and Estimated of Effects of Reduced Water Usage and Potential of Improved Water Use Efficiency in Peanut   Analysis of the U.S. peanut minicore collection identified accessions with significantly greater tolerance to drought and heat stress than possessed by check varieties. Runner accessions with yields >25% higher than checks were identified, as well as accessions with improved harvest indices. Economic analysis demonstrated that it is possible to grow peanut profitably under reduced irrigation using current varieties; however, varieties developed for improved profitability under reduced irrigation are needed.   

Field Scale Subsurface Drip Irrigation Interval Effects on Cotton Production   A three-year study showed subsurface drip irrigation (SDI) at 7-day intervals did not reduce cotton lint yields compared to 0.25- and 2-day applications. Longer SDI intervals could simplify irrigation systems thereby lowering initial cost without causing production problems.  

Cross Cutting Soil Water Sensing System   A waveguide-on-access-tube (WOAT) system for measuring soil water content and bulk electrical conductivity to user-chosen depths in 0.2-m increments using time domain reflectometry (TDR) was invented, tested in the laboratory and field with positive results, and a patent application submitted.  

Performance evaluation of pressure regulated in-canopy center pivot nozzle packages   Pressure regulators selected from older center pivot nozzle packages at third and last spans performed well under test conditions. The pressure regulators for an entire system were also tested; a number of regulators located near the pivot point were not functioning properly.   

Sensors to improve irrigation system technology and water use efficiency   A reliable and economical wireless infrared thermometer can be developed from off-the-shelf components. Normalized vegetative indices calculated from wireless multi-band prototypes were useful in distinguishing between soil and vegetation which will aid in irrigation automation.  

Last Modified: 04/22/2012