Seed yield and nutrient uptake in late sown toria (Brassica campestries var. toria) as influenced by different irrigation and fertilizer levels

A field experiment was conducted during 2014–15 in the Rabi season at Instructional Cum Research Farm of Assam Agricultural University, Jorhat, Assam, India to find the effect of different irrigation schedule and fertilizer levels on seed yield, oil content and nutrient uptake in late sown toria (Brassica campestries var. toria) grown after sali rice. Result revealed that application of different irrigation and fertilizers has significantly increased the yield of late sown toria over control. Out of different irrigation schedule, application of 6 cm irrigation at 25 and 50DAS recorded the higher seed yield (9.55 q ha⁻¹) which is 16.60, 23.11 and 37.10 percentage higher over the other irrigation schedules i.e. 6 cm irrigation at siliqua formation stage (50 DAS), 6 cm irrigation at pre flowering stage (25DAS), rainfed respectively. In case of different fertilizers levels, application of 75-50-50 N-P₂O₅-K₂O kg ha⁻¹ produced the highest seed yield (8.72q ha⁻¹) which is statistically at par with60-40-40 N-P₂O₅-K₂Okgha⁻¹ (8.48 q ha⁻¹), butsignificantlysuperior than45-30-30 N-P₂O₅-K₂Okgha⁻¹(7.10 q ha⁻¹). The oil content was slightly increased with the increase in fertilizer levels, 5.85% and 3.37% oil content was increased with the fertilizes dose 75-50-50 N-P₂O₅-K₂O kg ha⁻¹ and 60-40-40 N-P₂O₅-K₂O kgha⁻¹, respectively over 45–3030 (Control). However irrigation has no any significant role in oil content of late sown toria.