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Figuring fertilizer ratios - measuring lawn

Ratios for Smarter Fertilizing

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Fertilizer ratios and grades tell consumers how many pounds of nutrients are contained in 100 pounds of fertilizer and indicate the relative amounts of nitrogen (N), phosphorus (P), and potassium (K). To figure out home much fertilizer (or any other soil amendments) to buy, divide your lawn into simple geometric shapes, and then calculate the areas of the shapes using simple formulas. Formulas for Calculating Areas Rectangle or Square: Side…