ORGANOMINERAL FERTILIZER Russian patent published in 1997 - IPC

FIELD: chemical industry, agriculture, fertilizers. SUBSTANCE: invention relates to ecologically pure organomineral fertilizer of the prolonged action based on brown coal and mineral substances. Mineral substances are natural phosphorite ores of the following composition, wt.-%: $$$, 25-35; $$$, 7-11; $$$, 4-6; CaO, 20-40; MgO, 0.5-2.5; $$$, 6-18; $$$, 0.6-1.8; trace elements 1.2-1.4; and quartz-glauconitic ores of the following composition, wt.-%: $$$, 50-60; $$$, 1-3; $$$, 3-9; CaO, 10-30; MgO, 0.2-0.8; $$$, 0.4-1.6; $$$, 3-7; trace elements 1.0-1.1 at the following ratio of components, wt. -%: brown coal, 30-70; phosphorite ores, 20-40; and quartz-glauconitic ores, 10-30. EFFECT: improved quality of fertilizer, pure ecology. 2 tbl