ADSORPTION OF GLYPHOSATE AND AMPAIN AGRICULTURAL SOILS

Immediately after application glyphosate is mostly adsorbed in the upper 2 cm of soils, and is then transported and adsorbed after few days in deeper soil horizons with concomitant increasing content of its metabolite aminomethylphosphonic acid (AMPA) . This work confirmed previous studies, where Fe- oxides seem to play a major role in the adsorption of glyphosate and AMPA in soils:  the Chernozem featured lower contents of Fe d and Fe o , with consequently lower adsorption of glyphosate and AMPA as compared with the higher weathered Cambisol and Stagnosol.