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Question: soil testing laboratories usually estimate cationexchange capacity cec as the...

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Soil testing laboratories usually estimate cation-exchange capacity (CEC) as the sum of Ca2, Mg, and K displaced during extractions with neutral, 1 N ammonium acetate (NH 0Ac), which are performed primarily to test for available K. The following data were thereby obtained for three contrasting soils, but have been reported as pounds per acre for each of the three elements, assuming the conventional weight of 2 million pounds for an acre of soil 6 inches deep. Soil A 4004 381 1108 Soil B 1043 108 202 Soil C Ca2 Mg K* 11210 1734 2013 1. Convert each of the values reported to milliequivalents per 100 grams 2. Calculate the CEC of each soil, assuming the complete absence of other 3. If the three soils are a sand, a sandy 1oam, and a clay loam, identify (meq/100 g). cations. Express your answers in meq/100 g. how these textures correspond to soils A, B, and C in the above table.
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