Sulphur and Phosphorus Nutrition of Winter Maize in Calcareous Soil

Application of S or P increased chlorophyll content in maize foliage, which was maximum when P was applied along with S. Application of S significantly increased the concentration of S, P, Zn and Fe, whereas P decreased the concentration of S, Zn and Fe but increased P content in maize shoot at knee-high stage. Grain and stover yields also increased with Sand P application and the highest grain yield was obtained when 40 kg S was applied in conjunction with 60 kg P₂O₅ ha⁻¹. The uptake of S, P, Zn and Fe in grain and stover significantly increased with increasing levels of S but P application increased them up to 60 kg P₂O₅ ha⁻¹, beyond which their uptake decreased. Chlorophyll content in leaf exhibited significant positive correlation with grain and stover yield and S uptake. Similarly, Sand P concentration in shoot at knee-high stage showed significant positive correlation with Sand P uptake, respectively by grain.