Production of a complex organomineral fertilizer based on local raw materials

This study evaluates the chemical composition of Central Kyzylkum phosphorite, phosphogypsum, and sapropel as potential raw materials for complex organomineral fertilizer production. Sapropel contained 21.52% organic matter and 1.50% nitrogen, together with P, K, Ca, S, and Mg. Phosphorite contained 17.54% P2O5 and 47.75% CaO, while phosphogypsum contained 47.60% SO3 and 32.61% CaO. The results demonstrate the complementary composition of these raw materials and provide a chemical basis for further development of an N-P-K-Ca-S containing organomineral fertilizer.

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