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• <br />COMMON TERMS <br />- Acid Production Potential (APP) <br />• Also, Acid Generation Potential (AGP) <br />- Acid Neutralization Potential (ANP) <br />- Net Neutralization Potential (NNP) <br />• NNP = ANP -APP <br />- Ratio = ANP :APP <br />- CaC03 Equivalents <br />• APP and ANP results reported as tons CaC03 <br />equivalent per 1000 tons material <br />• 1000 tons from; an acre plow-layer contains <br />2 million pounds of soil <br />• 31.25 x S% =APP as CaC03 equivalent <br />n <br />m <br />u <br />u <br />~o <br />u <br />m <br />a <br />m <br />u <br />u <br />w <br />m <br />a <br />P <br /> <br /> <br />