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The field experiment was conducted at Uttar Banga Krishi Viswavidyalaya, West Bengal, India during rabi 2007-08 to 2008-09 to study the growth and productivity of yellow sarson under different nutrient managementi practices and pre-sowing seed soaking. The highest value of LAI (4.00), apart from the maximum plant height (129.97cm), dry matter accumulation (481.93g m-2) at 90 days, crop growth rate (12.29 g m-2 day-1) in between 45 to 60 days, root dry weight (1.645 g plant-1) with the highest average root diameter (0.932 mm) were observed in treatments receiving 75% recommended dose of chemical fertilizer with farm yard manure, Azotobacter and phosphate solubilizing bacteria as non-chemical source. Similarly at 45 days of crop age, significantly higher stomatal conductance (701.68 m mol m-2 s-1) and transpiration rate (4.55 m mol m-2 s-1) were reflected by the same treatment combination. These were attributed to the production of maximum seed yield (1374 kg ha-1), which was 39.91% higher than the recommended dose of chemical fertilizer application. On an average, seeds soaked with water before sowing reflected 9% lesser yield (1103 kg ha-1) against chemical soaking. Yellow sarson crop grown with integrated nutrient management practice consisting 75% of the recommended dose of chemical fertilizer along with farm yard manure (5t ha-1), Azotobacter (5kg ha-1) and phosphate solubilizing bacteria (5kg ha-1) coupled with seed soaking in 100ppm KH2PO4 confirms to be the best treatment combination from the treatment schedule considered during the study for the sub-Himalayan plains of West Bengal, India in terms of crop growth and productivity.

Growth physiology of Brassica rapa var. yellow sarson under integrated nutrient management and seed soaking approaches in eastern sub-Himalayan plains