Nutrients and Fertilisers
A basal application of Compound S at a rate of 1300 - 2100 kg/ha or Compound C at a rate of 1300 - 1500 kg/ha is recommended. Top dressing of Ammonium Nitrate (AN) at a rate of 290 kg/ha should be applied once, 3 weeks after emergence. In addition, top dressing of 400 - 500 kg/ha of Sulphate of Potash, splitting it into two equal applications, one at flowering and the other two weeks after flowering. The top dressing of Ammonium Nitrate (AN)
should be applied between rows or per plant before the final earthing up. A table below shows nutrient
requirement as recommended by (AGRITEX).
NB: All P and K must be applied at planting. P increases yield by increasing the number of medium sized tubers.
K increases the number of large sized tubers. 30 t/ha of organic manure supplies adequate P and K needed by the crop.
Half to two thirds N is applied at planting and the remainder, 2-3 weeks after emergence. Fertilizer must be banded slightly below and at the side of the seed to avoid contact with the seed.