Herbicides derived from weak acids can be affected in their sorptive capacity when they interact with soil pH. As a result, when their pH rises, they can reduce their sorption in the soil and increase their leaching. This increases the herbicide's bioavailability in the soil, resulting in a greater control effect on weeds and crop injuries. However, if there is rain, the herbicide may be transported by leaching in the soil profile to the deeper layers of the active seed bank, reducing weed control. Given the foregoing, it is critical to investigate the interactions with soil pH in risk assessment and agronomic procedures. The analysis of the herbicide's behavior in the soil, as well as the correct positioning of the product in chemical management. This chapter explains how the pH of the soil can affect the behavior of weak acidic herbicides in a chemically understandable way for agrarian scientists. The difference in electric charges of ionized herbicides and colloids was critical in understanding how these interactions occur, which are influenced by soil type and pH. Finally, it is expected that professionals who work with herbicides will be able to better understand some of the interactions of herbicide chemical molecules with soil and make appropriate recommendations.
Author (S) Details
Levi Andres Bonilla Rave
Department of Agronomy, Federal University of Viçosa, Viçosa – MG, Brazil.
Kassio Ferreira Mendes
Department of Agronomy, Federal University of Viçosa, Viçosa – MG, Brazil.
Daniela Margarita Echeverri Delgadillo
Department of Agronomy, Federal University of Viçosa, Viçosa – MG, Brazil.
Dilma Francisca de Paula
Department of Agronomy, Federal University of Viçosa, Viçosa – MG, Brazil.
Adalin Cezar Moraes de Aguiar
Department of Agronomy, Federal University of Viçosa, Viçosa – MG, Brazil.
Antonio Alberto da Silva
Department of Agronomy, Federal University of Viçosa, Viçosa – MG, Brazil.
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