Introduction to Major Field Crops

Nutrient Management

Application of FYM at 8-10 t/ha prior to sowing not only provide essential nutrients but also improve germination by reducing crust and also increases water retention capacity of soils. Sorghum is a heavy feeder of plant nutrients. General recommendation is 60 kg N,30 kg P2O5and 30 kg K2Ofor rainfed areas and 80 kg N and40kg P2O5 and 40 kg K2O for irrigated areas. For hybrids 100 kg N/ha is beneficial under irrigated conditions. In intercropping system with pulses, sorghum is to be supplied with 50 per cent of recommended levels of nitrogen, phosphorus and potassium.

Full quantity of phosphorus and potassium and half quantity of nitrogen should be drilled at 10 cm below at the time of sowing. Remaining half quantity of nitrogen should be given 30-35 days after sowing at knee high stage of crop. If moisture is scarce, avoid top dressing.

In zinc deficient area, apply 20-25kg ZnSO4 or 0.2 per cent ZnSO4 with half quantity of lime to prevent burning of laves.