EFFECT OF VARIOUS SEED RATES AND NITROGEN LEVELS ON THE PRODUCTIVITY OF LATE SOWN BRASSICA

A field experiment was conducted at New Developmental Farm (NDF) of The University of Agriculture, Peshawar during winter 2011 to study the effect of various seed rates and nitrogen levels on the productivity of late sown brassica. The experiment was conducted in Randomized Complete Block Design having three replications. Five seed rates (2, 4, 6, 8 and 10 kg ha^-1) and six nitrogen levels (0, 50, 75, 100, 125 and 150 kg ha^-1) were used. Rapeseed variety DURR-E-NIFA was sown on 25th Nov. Statistical analysis of different parameters revealed that days to maturity, siliques m^-2, grains silique^-1, thousand grains weight, grain yield and oil percentage were significantly affected by both nitrogen as well as seed rates. Late maturity (163 days) and higher number of siliques m^-2 (27048) were observed with seed rate of 10 kg ha^-1. Number of grains silique^-1 (24), thousand grains weight (3.5 g) and grain yield (2246 kg ha^-1) was higher with seed rate of 8 kg ha^-1 while oil percentage was maximum (44.9 %) with seeding rate of 6 kg ha^-1. Among nitrogen levels, nitrogen applied at the rate of 150 kg ha^-1 delayed the maturity (163 days). Siliques m^-2 (26863), grains silique^-1 (24), thousand grain weight (3.6 g), and grain yield (2255 kg ha^-1) was maximum with the use of 100 kg N ha^-1. Grain oil content was higher (44.7 %) with 75 kg N ha^-1. It was concluded that higher grain yield were observed with application of 100 kg N ha^-1 and 8 kg seed ha^-1 while higher oil content was recorded at 50 kg ha^-1 N and 6 kg ha^-1 seed rate which are recommended for higher yield and oil content for late sown brassica.