Pot experiments conducted in calcareous soil have shown that application of S, along with K and P in the soil, increased the nodulation, podding and pod and haulm yields of groundnut and also the concentration and uptake of these nutrients by groundnut. Sulphur had synergistic effect both with K and P on the yield and nutrients concentration and uptake. The P and K doses caused significant increase in all the parameters upto 150 kg/ha of P (as P2O5), and 100 kg/ha of K (as K2O). However, S was beneficial to groundnut upto 50 kg/ha. The increase in the concentrations and uptake of K and P by groundnut due to the application of K and P, were more pronounced with S than without S. On the other hand the effect of S on the concentrations and uptakes of K, P and S was more pronounced at higher levels of K and P than at their lower levels.
