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Fertilizer use in Groundnut

Fertilizer use in Groundnut

Lime application is essential to grow groundnut in acid soils. Apply lime @ 0.25 LK or 5 quintals per hectare along with FYM in furrows at the time of sowing for correction of soil acidity in light to medium textured acid soil. Lime application increases phosphate availability and supplies calcium, which is essential for pod filling and higher yield. Supplement organic manures with chemical fertilizers @ 20 kg N, 40 kg P2O5 and 40 kg K2O/ha. Apply full dose of fertilizer in the furrow. Seed should not come in contact with fertilizer. Phosphorus should be applied in form of single super phosphate which also meets the sulphur requirement. Apply well powdered gypsum @ 250 kg/ha close to the base of plants at 20-25 days after sowing on either side and incorporate in the soil, so that it remains in top 3 cm of soil. This is required because calcium has to be supplied to the developing pods independently as movement of calcium from vegetative parts to the pods through gynophore is limited due to narrow xylem vessel in the gynophore. This will improve number of pods and pod filling. Besides 22.3% calcium, gypsum also supplies 18.6% sulphur to the soil. Sulphur deficiency is likely to develop where groundnut is taken up continuously with high analysis fertilizer like Urea and DAP. However, gypsum is not required when Single Super Phospahte (SSP) or Ammonium Sulphate(AS) is used as it also supplies sulphur.

 

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