Influence of graded dose of nitrogen, phosphorus and potassium on yield and nutrient uptake of rajmash (Phaseolus vulgaris) during rabi

The field experiment was conducted at the Main Agricultural Research Station, University of Agricultural Sciences, Dharwad on black clay soil to study the response of rajmash (Phaseolus vulgaris L.) to the levels of nitrogen, phosphorus and potassium during rabi in the Northern Transition Zone with three levels of nitrogen (40, 80 and 120 kg N/ha), three levels of phosphorus (25, 50 and 75 kg P₂O_s/ha) and two levels of potassium (30 and 60 kg K₂0/ha) with an absolute control (0: 0: 0 kg N: P: K/ha). The results of the investigations revealed that significantly higher grain yield was recorded with 120: 75: 60 kg N: P₂O_g: K₂O/ha fertilization (1375 kg/ha) which was on par with 80: 75: 60 kg N: P₂O_s: K₂O/ha (1352 kg/ha) and 80: 75: 30 kg N: P₂O_s: K₂O/ha (1337 kg/ha). Nutrient uptake also significantly increased with the increasing rates of fertilization.