Production of a complex organomineral fertilizer based on local raw materials
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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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