Evaluation of a Low Pressure, Linear Move Irrigation System for Cotton

A modified, lowpressure, linear move sprinkler irrigation system was used to irrigate upland cotton at the Marana Agricultural Center, University of Arizona in 1984. Furrow drop lines and lowpressure spray booms were used for water delivery for comparison purposes. Irrigations were scheduled according to a Crop Water Stress Index (CWSI) in conjunction with a neutron probe for soil moisture deficit determinations. The yield with furrow drop lines was 2.45 bales /acre while the spray drop booms yielded 2.55 bales /acre. The furrow drop lines received 21.47 inches of applied irrigations. Spray booms received 21.74 inches. Seasonal rainfall was 8.60 inches.