For many years, University and fi eld trials on many crops have shown two applications of Perc N Phos at 16 ounces/acre to improve seedling vigor, reduce stress and increase yields. When applied with glyphosate, Perc N Phos has also been shown to aid crop tolerance to herbicide injury while reducing the resulting nutritional deficiencies associated with herbicides. Applying Glyphosate? Add Perc N Phos!