Mineral for fertilizers BENTONITE-F origin BENTONITE-F is a volcanic tuff mineral that belongs to a rare variety of bentonites. It has a high content of active silicon and wide range of elements. BENTONITE-F is complex natural mineral of volcanic origin with over 35 trace elements vital for all living organisms. As an agromineral BENTONIT-F is a highly effective, environmentally friendly multicomponent natural fertilizer and growth stimulator, a powerful sorbent. BENTONITE-F, as a source of active watersoluble silicon, is the most important element in organic mineral fertilizers and is more efficient than traditional complex mineral fertilizers. Quality parameters: Appearance: homogeneous brown powder without odour Fraction : 0-3 mm Packing : big-bags 600 kg Agro-mineral content: Macro elements, w% : SiO2 41,0-42,0, K2O 3,12-3,14 Microelements, mg/kg : Fe2O3 120000-140000, MgO 33000-37000, CaO 23000-25000, MnO 900-1600, V 200-400, Cu 150-280, Zn 80-100, Co 40-80, B 20-40. Ultra-microelements, mg/kg : Se 30, La â?? 25, Sm 20, Ne 14. Movable (water-soluble silicon), not less than 3500 mg/kg Acid-soluble silicon, not less than 70 000 mg/kg Available silicon, not less than 150 000 mg/kg Humidity: 2-4%