FERTILIZERS

Compound Fertilizers (Mixture)

a)  Ratio shows proportion (balance) between N, P and K e.g. 2:1:2 equal amounts of N and K, 1/2 quantity P₂O_5.

b)  Figures show analysis of the compound in %age of N, P₂O₅, K₂O etc. 100 kg of 10:5:10 mixture supplies 10 kg N, 5 kg P₂O₅, 10 kg K₂O.

C)  Fertilizer programmes allocate kg of N, P2O5 and K2O to each hectare.

d) Fertilizer orders : For straight fertilizers, name and analysis figure and for compound fertilizers, components to be used and ratio (supplier should give analysis).

e) Overage : With urea, the handling and application losses are substantial and 10% over and above the calculated quantity may be taken into account including foliar application.

f) Mixing : For YTD 10:5:10 SOA 500 kg + SSP 312.5 kg + MOP 167 kg + 20.5 kg Filler makes 1 tonne of YTD. (This is an illustration only, many other mixtures can be made).

g) Analysis: To check on supplies before application, 500 g samples of mixtures made up by taking small samples from every 10th bag of a consignment can be sent for nutrient % analysis to : R.V. Briggs & Co., Calcutta Hindustan Fertilizer Corpn., Namrup.

h)  Fertilizer Conversion Table :

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