Phosphorus-copper relationship in wheat

Summary A green-house experiment was conducted to study P–Cu relationship in wheat variety S-308 grown up to maturity. Treatments included five levels, each of P (0, 25, 50, 100 and 250 ppm) and Cu (0, 2.5, 5, 10 and 50 ppm) in all possible combinations. The yield, P and Cu concentration were more with the application of Cu upto 5 ppm with P, and P upto 50 ppm with Cu, over P alone and Cu alone, respectively. Application of 50 ppm Cu adversely affected yield and P concentration and 250 ppm P adversely affected yield and Cu concentration. Application of affected nutrient counteracted to a great extent the adverse effect of the other nutrient. The low levels of P and Cu were essential for better plant growth and efficient utilization of both the nutrients and antagonism was noted only when one of the nutrients was applied in high quantities.Contribution from the Department of Soils, Haryana Agric. Univ., Hissar-India.