The nutrient recommendation for Black gram is 30:30:30 kg NPK/ha. The quantity of straight fertilizers to get the above dose is worked out for a cent.

The fertilizers dose needed is 80 gram urea, 666 gram rock phosphate and 200 gram Muriate of Potash respectively for a cent. The fertilizers have to be applied in split doses.

The first dose has to be applied at the time of planting. The urea, rock phosphate, Muriate of Potash needed at this time is 40 gram, 666 gram, 200 gram respectively for a cent.

The second dose has to apply in 15 days after sowing as foliar spray. The dosage is 20 gram urea in one liter of water.

The third dose has to be applied at 30 days after sowing as foliar spray. The dosage is 20 gram urea in one liter of water.

Lime or dolomite @ 1-3 kg per cent has to be applied in acid soils two weeks ahead of fertilizer application. Organic manure @ 80 kg/cent is recommended at planting time.

To get the details for an acre you need to multiply the values with 100.