Nitrogen Levels, Tillage Practices and Irrigation Timing Influenced Yeild, Yeild Components and Oil Contents of Canola

Field experiment was conducted at Agriculture Research Institute (N) Mingora Swat, Pakistan during 2012-2013. The experiment was laid out in RCBD with split plot arrangement having three replications. Irrigation timing (12 days, 22 days and 32 days) and tillage Practices (conventional tillage with cultivator, deep tillage with chisel plough and shallow tillage with MBP) were allotted to main plots, while Nitrogen levels (0, 30, 60 and 80 kg ha -1 ) were allotted to sub plots. Irrigation timing had significantly affected all the parameters except oil content. Water supply to crop with 12 days irrigation timing had maximum seed capsule -1 (27), 1000 seed weight (3.61 g), oil yield (515 kg ha -1 ), seed yield (875 kg ha -1 ) and biological yield (6642 kg ha -1 ) as compared with irrigation timings. Tillage Practices had significantly effected on all the parameters except oil content. Conventional tillage produced maximum seed capsule -1 (23), 1000 seed weight (3.38 g), oil yield (505 kg ha -1 ), seed yield (848 kg ha -1 ) and biological yield (6054 kg ha -1 ) as compared with deep and shallow tillage implements. Nitrogen application had also significantly affected all parameters. Plots treated with 80 kg P ha -1 produced maximum seed capsule -1 (27), 1000 seed weight (4 g), oil content (58.21 %) oil yield (676 kg ha -1 ), seed yield (1160 kg ha -1 ) and biological yield (6684 kg ha -1 ) as compared with control plots. The interaction between tillage Practices, irrigation timings and Nitrogen levels revealed that application of water to crop with 12 days irrigation timing used conventional tillage method and treated with 80 kg P ha -1 had maximum seeds capsules -1 , 1000 seed weight, oil yield, seed yield and biological yield. Conventional tillage with 12 days irrigation timing and treated with 80 kg P ha -1 seems to the best choice for Canola producer in the agro-ecological condition of Peshawar valley. Key w ords : Canola (Brassica napus L.), tillage, irrigation timing, Nitrogen levels, oil content, oil yield