Steel slag is not only a liming agent The action of silica ... is a factor of production that values the potential of your crops … Best climb stems and tillers* ears *tillers = new rods MAIN EFFECTS: Progressive action linked to contact with water in soil:  Agregate fines particles  Help mobility and assimilation of oligo-elements  Maintain pH of soil  Help bacteria acting for N fixation  Si will act on rigidity of the plant  Resistance to fungal disease  Increase yields through P absorption These effects are linked to soluble silicate diffused in soil and not total silica content. More nutriments absorbed M ,P, Mg ,N ,Ca, Zn, Cu, K , Co, S