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Phosphate Fertilizer -Double Super Phosphate |
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| Importance of the Fertilizer | Double Super Phosphate (DSP) also called Enriched Super phosphate. It is water soluble phosphatic fertilizer. It is a mixture of Triple Super Phosphate and Single Super Phosphate. |
| Amount of Available Nutrients | Double Super Phosphate contains 35 % Phosphorous. |
| Compatibility in fertilizer mixtures |
Double Super Phosphate can be mixed with Murate of Potash, Potassium Sulphate, Ammonium Sulphate, Ammonium Phosphate. It should be mixed only prior to application with Calcium Ammonium Nitrate, Sodium Nitrate and Urea. It can’t be mixed with Calcium Carbonate. |
| Reaction of the Fertilizer in Soil | DSP contains phosphorous as monocalcium phosphate which is water soluble and available to plant. In low pH soils phosphorous will form difficulty soluble compounds with iron and aluminium ions and at pH values near neutrality it will form soluble compounds with calcium and magnesium ions and at higher pH values it will form difficulty soluble compounds with calcium ions. |
| Situations where Recommended | It is advisable to apply as basal dose since the phosphorus requirement is high during the early growth period of the crop. Early application promotes early growth which in turn leads better utilization of soil nutrients. It is recommended in soils which is neutral to alkaline in reaction. For short duration crops where quick response is required, DSP is suitable. |
| References | 1. Yawalkar, K. S., Agarwal, J. P., and Bokde, S., (1996) Manures and Fertilizers, Agri-Horticultural Publishing House, Nagpur |