FIELD: fertilizer production. SUBSTANCE: method involves by-layer applying a mixture consisting of polyisocyanate with polyhedral alcohol. This mixture is applied by parts at layer thickness 10-30 mcm, preferably 15-20 mcm. Layers were hardened using liquid amine after each layer hardening amine concentration is decreased to noncatalytically active level. The produced fertilizer exhibits the prolonged action. EFFECT: improved method of producing, enhanced quality and property of fertilizer. 2 cl, 8 dwg, 1 tbl
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