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Phosphatic Fertilizers

Phosphatic Fertilizers

Phosphorus plays a key role in the transfer of energy inside the plant. It is essential for photosynthesis (process in which green leaves manufacture carbohydrates in the presence of sunlight) and other physiological processes in the plant. It is indispensable for development of plant body. Next to nitrogen, phosphorus is the most deficient primary nutrient element in Indian soils. Plants need it in good amounts, which the soils can not supply without the soils being supplemented from outside. A serious drawback existing with the phosphatic fertilizers is that their phosphorus easily gets fixed with soil  clays soon after the fertilizer is applied to the soil. Plants are hardly able to absorb more than a. 15-20 per cent of the total added fertilizer-phosphorus. The remaining phosphorus is fixed in the soil and becomes unavailable to the plant grant roots. For the phosphorus to be available to the sold plants, it must be soluble in soil solution (soil or p water containing some salts dissolved in it). Solubility of phosphorus in the soil solution depends on the reaction or pH of the soil. It also depends on the type of phosphatic fertilizer. Depending on the olubility of are phosphatic fertilizers, they are grouped into the three categories, viz., (1) water soluble  phosphatic fertilizers, (2) citric acid soluble - phosphatic fertilizers, and (3) insoluble phosphatic fertilizers.

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Please note that this is the opinion of the author and is Not Certified by ICAR or any of its authorised agents.