Exchangeable Bases - Ammonium Chloride (15A1)

Method for measuring exchangeable bases (Ca²⁺, Mg²⁺, Na⁺, K⁺) - 1M ammonium chloride at pH 7.0

Suited for use on all soils, irrespective of whether acidic or alkaline, but preferred on acidic to weakly alkaline soils not dominated by solid-phase carbonates. Method 15A1 has no pre-treatment to remove soluble salts, with alternatives to remove them chemically (15A2) or to adjust for the presence of soluble sodium (15A3).