In the invention, a fertilizer Was discovered Which is far more effective than conventional silica fertilizers (forexample, SICA fertilizer), When silica gels, Which Were hitherto used mainly as adsorbents, Were studied as potential
silica fertilizers. Specically, the supplying ef?ciency of silicic acid to plants or the absorption/availability ef?ciency of silicic acid by plants (the ratio of fertilizer actually absorbed by gramineous plants to that spread to the soil)proved to be extremely high. As a result, plant stalks become strong by being silici?cated and in the case of rice,