[en] A new procedure of analyzing ⁹⁰Sr in soils was developed. The main procedures consist of three basic steps: oxalate precipitation to remove bulk potassium, chromatographic separation of Sr from most inactive and radioactive interferences and determination of radioactivity by liquid scintillation spectrometry. When ⁹⁰Sr was determinate, ⁹⁰Y newly growing must be deducted at the same time either by decaying time correction or by dual labeling. Procedures and manipulations were simplified, and the separation and determination can be carried out in 12 h. The chemical yield is about 80%, and the minimum detectable activity by this technique is about 20 Bq/g. (authors)