Effect of nutrient levels on yield, nutrient uptake and economics of Indian mustard (Brassica juncea) in tarai region of Uttarakhand

A field experiment was conducted during winter (rabi) season 2014–15 at the N.E. Borlaug Crop Research Centre of the Govind Ballabh Pant University of Agriculture and Technology, Pantnagar to study the effect of nutrient levels on yield, nutrient uptake and economics of Indian mustard [Brassica juncea (L.) Czernj and Cosson] cultivar ‘RGN 73’ in tarai region of Uttarakhand. Treatment consisted of 3 levels of nitrogen (60, 80 and 100 kg/ha), 2 levels of phosphorus (20 and 40 kg/ha) and 2 levels of potassium (0 and 30 kg/ha), which were evaluated thrice in a randomized block design. The highest seed yield (1.93 t/ha), nutrient (N: P₂O₅: K) uptake (99 kg N, 42 P₂O₅ and 172 kg K₂O/ha), net returns (37.13 × 10³/ha), gross returns (60.45 × 10³/ha) and benefit: cost ratio (1.54) were recorded with application of 100 kg N + 40 kg P₂O₅ + 30 kg K₂O/ha followed by 100 kg N + 40 kg P₂O₅+ 0 kg K₂O/ha and 100 kg N + 20 kg P₂O₅+ 30 kg K₂O/ha treatments.