EFFECTS OF POTASSTON AND IRRIGATION ON THE YLELD AND SIZE OF SEED TUBER OF POTATO

Abstract

A field experiment was carried out during the period from November 2009 to February 2010, in the Agro Service Center, BADC farm, Chehelgazi, Dinajpur to study the effects of different levels of potassium and irrigation on the yield and tuber size of potato (cv. Diamant). The treatments of the experiment comprised of twelve combinations of four levels of potassium viz. 0, 150, 250 and 350 kg K,O per hectare and three levels of irrigation (I, = 15 cm, I, = 30 cm and I; = 45 cm). The largest tuber grade D (>45 mm diameter) obtained with application of potassium (350 kg KO per hectare). It was revealed that the variety was superior when potassium applied (350 kg K,O per hectare) than control treatment (0 kg KO per hectare). Regarding main effect of potassium and irrigation, significant influence was observed on all the growth and yield contributing characteristics except days required for 80% emergence of plant. The highest yield of potato per plot (13.83 kg) was obtained from the application of 250 kg K,O per hectare with irrigation level I;. The control treatments for the different levels of potassium and irrigation gave poor result in all respects.