COMPLEX FERTILIZER OF PROLONGED ACTION Russian patent published in 2002 - IPC

FIELD: agriculture. SUBSTANCE: the innovation deals with complex organomineral fertilizers containing phosphorus, potassium, calcium, magnesium, humic acids and microelements: Mn, Zn, Cu, Co, Ni, Mo. Complex fertilizers of prolonged action includes natural phosphorite and oxidized brown coal reduced to 0.25-0.5 mm at the ratio of 1:5 - 1:10 which were subjected to composting at mixture moisture content being at the level of 60% against its total moisture capacity for 60-70 d and containing elements-biophils, weight%: P₂O₅ 1.72-3.81, K₂O 1.38-3.62, CaO 14.02-28.04, MgO 8.06- 16.17, Mn 0.16-0.27, Zn 0.024-0.038, Cu 0.016-0.018, Co 0.009-0.035, Ni 0.03- 0.05, Mo 0.006-0.023, humic acids 31-67. Complex fertilizer increases crop yield and quality of agricultural varieties. EFFECT: higher efficiency. 3 ex