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5. The iso-line map on the following page is used to <br /> determine the value for rainfall (R) . Rainfall = 100 <br /> (iso-line map) <br /> R = 100 <br /> COMPUTATION: (S x K x C x P x R) x 0 . 44 = 0 . 95 tons/acre/year* <br /> Note: A conversion factor of 0 .44 is used to convert metric <br /> tons per hectare per year to short tons per acre per year. <br /> * 0 . 95 tons/acre/year is less than 2 tons/acre/year, and <br /> therefore is considered an allowable soil loss. <br /> Control measures have been designed to keep sediment on <br /> site. <br />