Compound fertilizers

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Available:

NPK 19 19 19

NPK 17 17 17

NPK 6 6 43

NPK 12 5 43

Potassium Nitrate 6 0 13

MAP 12 61 0

MKP 0 52 34

DKP 0 41 54

DAP 18 44 0

Urea Phosphate 18 44 0

Compound fertilizers

Compound fertilizers, which contain N, P, and K, can often be produced by mixing straight fertilizers. In some cases, chemical reactions occur between the two or more components. For example, monoammonium and diammonium phosphates, which provide plants with both N and P, are produced by neutralizing phosphoric acid (from phosphate rock) and ammonia :

NH3 + H3PO4 → (NH4)H2PO4
2 NH3 + H3PO4 → (NH4)2HPO4

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