Researchers conducted a study to find effective ways to control weeds in maize fields. They tested different herbicide combinations and found that using a mix of pendimethalin and imazethapyr before the maize plants emerged was the most successful in reducing weed growth. This method also led to higher maize yields compared to other weed control methods. Another effective treatment involved using atrazine and mustard residue mulch. Overall, the tank-mix herbicide application before maize plants sprouted was the best way to manage weeds and improve crop yields in the study.