Аннотация:The residual mass of the degraded pesticide decreases exponentially with time. Spatial heterogeneity of atrazine residue concentrations was studied under field conditions. Factors of atrazine degradation are range of soil properties: soil temperature, water content, humus content and pH. It was construction the regression and information logical models of herbicide persistence to assess long-term impact of contamination on soil, the half-life period and other degradation rates.