Integrating soil conservation practices and glyphosate-resistant crops: impacts on soil.

The article reviews the impact on soil of conservation practices and glyphosate-resistant crops. It presents data from a Mississippi field trial comparing glyphosate-resistant and non-glyphosate resistant maize (Zea mays L.) and cotton (Gossypium hirsutum L.) under the limited tillage management. The review concludes that there are minor effects of glyphosate use on soil biological/chemical properties. On the other hand, enhanced organic carbon and plant residues in surface soils under conservation practices can influence potential effects of glyphosate. It is recommended that a long-term research under various cropping systems and ecological reasons be made for the critical assessment of glyphosate-resistant crop and conservation practice interactions.