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Table 2 <br /> CHEMICAL CHARACTERISTICS <br /> Sample Nitrate <br /> Number Nitrogen Phosphorus Potassium Iron Manganese Zinc Copper <br /> 1 2.4 1.8 202 37.1 5.4 12.7 2.0 <br /> la 3.0 1.6 184 44.0 5.2 12.5 2.1 <br /> 2 8.6 1.6 124 44.8 5.0 12.6 2.0 <br /> 3 7.4 1.6 160 40.2 5.1 12.0 2.4 <br /> 4 10.0 1.8 136 38.4 5.1 11.8 2.1 <br /> 5 12.8 2.0 220 49.2 5.4 6.1 1.9 <br /> 6 4.6 1.6 144 39.4 6.0 9.2 1.7 <br /> 7 5.4 1.6 120 37.6 4.8 6.1 1.9 <br /> 7a 6.0 1.8 120 63.2 4.6 7.4 2.0 <br /> 8 5.6 1.6 126 40.8 4.7 10.2 2.2 <br /> 9 4.0 1.4 114 38.2 5.0 12.4 2.0 <br /> 9a 4.2 1.4 80 36.4 4.8 11.8 1.8 <br /> Determinations made from ammonium bicarbonate -- DTPA extraction. <br /> 115 <br />