1 Regional Res. Station, NARP, NAZ, Chakdah (W.B.).
2 AICRP on Cropping System Research, BCKV, Kalyani-741235 (W.B.).
Two years field study was conducted at the university Research Farm, to visualise the performance of irrigation levels (I1 to I4, respectively at stolon initiation, tuber initiation, early bulklng and late bulking stage) and agro-chemicals (Paras, a photosynth contains Mixtalol and Planofix, a growth regulator) on the tuber yield of potato. It was revealed from the experiment that the yield characteristics and tuber yield of potato were influenced significantly by the irrigation levels and sprayed materials. Number of tuber/hill, wetght/tuber and tuber yield was increased significantly with the irrigation level and was maximum at 4-irrigation levels (19.3 t/ha) which was 61.8% more than that of single irrigation given at stolon initiation stage. The effect of agro-chemicals on both the yield and yield characteristics were more predominant over without spray during the period of experimentation. Maximum tuber yield of potato (17.9 t/ha) was obtained when standing crop was sprayed two times with paras and two times with planofix 05.0 and 0.25 ml/lit of water at 30,50 and 40,60 DAS and the increment was 18.5% more than that of control (15.1 t/ha).
