In this paper, ammonium acetate-1,2-diaminocyclo-hexanetetracetic acid is proposed as an extractant for the determination of cation exchange properties of acidic soils. The conditions for the spectrophotometric determination of exchange acidity with ethyl red in soil extracts were studied. Results are in reasonable agreement with those obtained by routine HCl titration after extraction with BaCl2-triethanolamine. Exchangeable bases in the soil extract can be determined with atomic absorption spectroscopy or photometrically using chlorophosphonazo III xylidyl blue I, and flamephotometry. After removal of the extractant, cation exchange capacity can be determined.