HUMIN-ENRICHED MINERAL FERTILIZER AND METHOD FOR ITS PRODUCTION Russian patent published in 1998 - IPC

FIELD: agriculture; organic chemistry; production of mineral fertilizers encapsulated in shells made of humin preparations. SUBSTANCE: humin-enriched fertilizer comprises granulated mineral fertilizer, alkali metal humate and carbamidoformaldehyde resin taken in the following ratio, mas.%: 95.7-96.6; 3.0-4.0, and 0.3-0.4, respectively. Granules of mineral base are subjected to cladding with alkali metal humate. After cladding fertilizer granules are additionally treated with solution of alkali metal humate and carbamidoformaldehyde resin. EFFECT: reduced fertilizer consumption due to improved assimilation of it by plants. 4 cl, 1 tbl