What the sulfuric acid monohydrate magnesium uses is from the sea water high temperature salt the direct refinement method, is the natural sulfur magnesium fertilizer, increases as the leaf surface fertilization in compound fat uses, very suitable uses and so on industrial crop like rubber tree, palm, tobacco, flowers and plants, vegetables. Has easily to absorb, not to destroy the soil PH value the characteristic, is lacks the magnesium crops and the soil makes up the magnesium fertilizer best.