Dependence of Apparent Self-Diffusion Coefficients and Capacity Factor of Zinc on the Physical and Chemical Environment of Soils

Apparent self-diffusion coefficient and capacity factor of zinc were determined in thirteen representative soil samples. Variations in moisture tension significantly influenced the apparent self-diffusion coefficient of Zn. Soils exhibited lot of variations in the apparent self-diffusion coefficient of Zn. Multiple linear regression analysis revealed the significant influence of EDTA- (NH₄)₂CO₃ extractable zinc at 0.1 bar, capacity factor and pH at 0.33 bar and total iron content at 1.00 bar moisture tension on the apparent self-diffusion coefficients of zinc. Capacity factor of zinc was significantly influenced by organic carbon, clay content, cation exchange capacity, CaCO₃ content and DTPA extractable zinc.