Leaves of pumpkin showing no symptoms of powdery mildew development when grown in soil amended with wollastonite, a natural mineral source of calcium silicate. Vegetables, grains, and fermented grain products are sources of silicon in human nutrition.įigure 1. In animals, silicon strengthens bones and connective tissue. Silicon protects against lodging, drought, temperature extremes, freezing, UV irradiation, and chemical stresses including salt, heavy metals, and nutrient imbalances
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