Experiments were conducted during 1997 and 1998 to study the effect of different levels of copper on soil copper content and its nutritional effect on the uptake of nitrogen, phosphorus and potassium by different varieties of Soybean (Glycine max L. Merrill). Results revealed that application of copper consistently increased the different forms of copper in soil viz., 0.005 M DTPA-extractabie copper, fixed copper and total copper and were positively and significantly correlated with each other. Soybean varieties differed significantly in their copper requirement for grain yield, grain nitrogen, phosphors and potassium uptake. Variety PK 416 at 5kg Cu/ha showed a trend of increased grain yield nutrient uptake, whereas Bragg yielded lowest could be grown on copper deficient soils while PK 1042 or PK 262 gave intermediate response at 2.5 kg Cu/ha.
