FIELD: agriculture. SUBSTANCE: proposed compound having formula CO3(PO4)2·xNH3·yH2O where x=5-12, y=8-11 is prepared by saturation of solid with gaseous ammonia. Said compound contains active form of Co (II) as microelement. Mentioned above saturation takes place within 12-40 days at 15-25 C. EFFECT: improves activity of desired product. 3 cl, 8 tbl
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