THE EFFECT OF DIFFERENT NITROGEN DOSES AND IRRIGATION INTERVALS ON YIELD, IRRIGATION WATER AMOUNT OF COTTON PLANT GROWN IN EAST OF MEDITERRANEAN REGION AND ECONOMICAL ANALYSIS

The experiment was conducted to determine the effect of nirogen levels and irrigation intervals applied with drip system on cotton yield, evapotranspiration water use efficiency in East Mediterranean Transitional Zone Agricultural Research Institute Located Kahramanmaras, Turkey during 2012 2013. In experiment, 3 different nitrogen (N0:0, N15:150, N30: 300 kg ha-1) 2 (I5: 5 I10:10 days) were investigated Erşan-92 variety. amount estimated by replenishment soil deficit 60 cm root-zone depth field capacity 10 days. experimental design split-plots three replications. treatments research years varied between 511.9-633.8 498-611 mm respectively. Cotton yield values for applications ranged 2520-3360 2360-3540 ha-1 Higher yields obtained 5-day frequency compared every effects application interaction Water (WP) Irrigation (IWP) found be statistically significant at 1% level. I5 N15 generated highest net income lowest I10 N0. As a result 150 dose days interval recommended production region.