Abstract
AbstractA procedure is described which allows the ionic composition of the soil solution and exchange phases to be measured on the same small soil sample. This procedure is based on existing methods which use a dense, water‐immiscible liquid to displace soil solution during high speed centrifugation. Exchangeable ions are then extracted by shaking the soil with 1.0 mol L−1 ammonium acetate (pH 7), after which the soil is oven‐dried and the water content determined. The solution extracted from the soil sample accurately represents the ionic composition of the equilibrium soil solution and the procedure does not affect the ionic composition of the exchange phase.
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