Pima and Acala Responses to Deficit Drip Irrigation and Nitrogen Management

Subsurface drip irrigation trials were conducted in two locations to evaluate responses of Acala and Pima cotton to irrigation levels ranging from 40% to 100% of estimated evapotranspiration during specific growth stages, with studies done at sandy loam and clay loam soil sites.  At one location, variable nitrogen applications were also made to determine responses to N ranging from limiting to likely excess under drip irrigation.