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SummaryThe extractive powers of different extraction procedures (Electro-Ultrafiltration, 0.01 M CaClz and standard Dutch methods) were compared mutually for a limited number of nutrients in soil samples from 21 locations. The results showed that for almost all parameters under study (Na, K, Mg, Mn, P, N) the methods are interchangeable. Drawbacks of the EUF technique are lower reproducibility of the results, laboriousness and high cost. Moreover, the extraction of exchangeable forms of Mn and Mg with this technique was incomplete. Extraction with 0.01 M CaCl2 seems recommendable due to the simplicity of the analytical procedure giving sufficient information for practical soil-analytical purposes.

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