Multivariate analysis and multiple linear regression as a tool to estimate the behavior of hexazinone in Brazilian soils.

Weed control efficiency and the environmental contamination potential of herbicides depend on soil sorption and desorption. Among the indexes that evaluate the soil adsorption processes, the coefficients sorption (Kf) and desorption (Kf) obtained by Freundlich isotherms can provide accurate information about the behavior of an herbicide in the soil. The values of Kf and Kf of an herbicide vary according to the physicochemical characteristics of the soil, so it is possible to estimate these coefficients with high precision if good predictive mathematical models are constructed.