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Section 779.21 (a) Continued. <br />• reported a range of 0.7 percent to 10.8 percent, with an average <br />of 4.8 percent. Along Fish Creek, at Afine No. 2, organic matter <br />percentages ranged from 0.64 to 5.61 percent with an avF.rage of <br />2.96 percent. Energy Fuels found a range of 0.34 to 19.44 percent, <br />with an average of 5.61 percent organic matter in tl~e Eckman Park <br />area. <br />Heil (1976) reports that values of about 3 percent are considered <br />"high" in organic matter. Ludwick, et. al. (1975) state that soils <br />with organic matter percentages above 2 percent, no fertilization <br />is necessary for normal plant growth. <br />Phosphorus. A total of 112 samples taken from the permit area were <br />analyzed for phosphorous. Heil (1976) found bicarbonate phosphorous <br />levels on Energy Mine t7o. 1 ranging from 1 ppm to 34 ppm, with an <br />average of 9.5 ppm. U.S. Department of Agriculture researchers, <br />• found phosphorous to range from 6.8 ppm to 39 ppm, with an average <br />of 19.0 ppm. Heil (1978) found phcsphorous to range from 1 ppm to <br />133 ppm, with an average of 20.9 ppm. In the C-20900 Lease area ~f <br />Energy Mine No. 2, phosphorous ranged from 3.0 ppm to 38.7 ppm, <br />with an average of 17.9 ppm. In Eckman Park, phosphorous values <br />ranged from 0.6 ppm to 35.0 ppm, with an average of 10.2 ppm. <br />According to the standards published by Ludwick, et. al. (1975) <br />soils having greater than 7 ppm extractable phcsph~rus levels <br />require ro fertilization for crop production. The samples taken <br />would be labeled as being of "medium" phosphorous bearing potential. <br />Potassium. A total of 112 samples taken from the permit area were <br />analyzed for potassium. Heil (1976) reported a range in water <br />soluble potassium of 0.07 to 2.0 me/1, with an average of 0.56 <br />me/1. Researchers at Colorado State University found potassium to <br />range from 217 ppm to 570 ppm, with an average of 315 ppm. On the <br />. C-20900 Lease area in Energy :tine No. 2, potassium ranged from 124 <br />779-296 <br />