Abstract
This work investigates the kinetics of propoxur washing out and its residues in five arable soils with a clay content from 4–28% and an organic matter content from 1.3–1.8%. It has been noted that the fastest washing out occured with the emulsion form, the slowest washing out with the pure active substance, whereas an intermediate velocity was observed for the suspension form. The amount of propoxur in the reflux was also highest for the emulsion form, intermediate for the suspension form and lowest for the pure active substance. The highest residue level in the investigated soils was observed for the pure active substance. The kinetics of propoxur washing out in all the investigated forms was inversely proportional to the content of clay particles in the soils. Adsorption increased with the increase of clay particle content.
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