Residual herbicides in different systems of soil tillage

Abstract

The weed control efficacy of the pre-emergence herbicides oryzalin + metribuzin and cyanazine + metolachlor applied on soybeans (Glycine max, Merrill) was studied in no-tillage, minimum tillage, and conventional tillage. The soybean grain yield was higher in conventional tillage than in minimum tillage and no-tillage.