Our studies(ศึกษา) with wheat and corn show that tighter sowing in grid patterns supresses weed growth(การเจริญเติบโต). This provides increased crop yields(ผลผลิต) in fields prone(แนวโน้ม) to heavy amounts(ปริมาณ) of weeds(วัชพืช)," states an author and plant ecologist(นักนิเวศวิทยา).