Determination of the effect of different irrigation programs for tomato plant irrigated with drip irrigation system through using class-A pan under organic agriculture

This research was carried out to determine irrigation schedule of H-2274 tomato cultivar irrigated by the drip system with the pan-evaporation method under organic farming conditions in Gokceada in 2006-2007.The experiment had been settled in randomized split strip plot design with three replications. Irrigation treatments had consisted of five different plant-pan coefficients (Kpc= 1,00; 0,75; 0,50; 0,25 and 0,00) and applied water level increase for each coefficients at different crop growth stage.Irrigation quantities applied to the treatment varied from 370,57 to 79,30 mm in 2006 and 532,47 ? 248,01 mm in 2007; seasonal plant water consumption of irrigation treatments varied from 476,27 to 191,81 mm in 2006 and 479,93 to 162,63 mm in 2007.According to the data obtained, irrigation water amounts effected the fruit yield both in two years and highest yields were obtained from Kpc3= 0,75 irrigated plots 5858 kg/da in 2006, and the same plots 5302 kg/da in 2007.