EFFECT OF NITROGEN AND POTASSIUM ON GROWTH, ECONOMICAL YIELD AND YIELD COMPONENTS OF TOMATO

Investigations were undertaken to study the effect of N and K doses (60, 90 and 120kg ha^-1 N and 90kg, 110kg, 130kg of K) on growth, economical yield and yield components of tomato under the agro-climatic conditions of Swat. The parameters selected under study i.e plant height at flowering stage, days to flowering, days to maturity, number of primary branches per plant, fruit length, fruit width, number of fruits per plant and total yield were significantly affected by the applications of N and K. The maximum days to flowering (52) in 00kg N and 110kg of K, maximum days to maturity (85.67) were taken when was obtained with the application of 120kg N and 130kg ha^- 1 of K was applied. Maximum fruit length (5.96cm) was noted in 00kg of N and 130kg/N of K, while maximum fruit diameter (5.08cm) was noted when plants received 120kg N and 90kg K. in treatment 14 (120kg N and 90kg ha^-1 of K), Economical yield (19 ton ha^-1) was obtained with 60kgN and 130kg ha^-1 of K.