The researchers studied different ways to control weeds in maize fields to see how it affects plant growth, yield, and profits. They tested five methods, including using herbicides and mechanical weeding. The best method was using atrazine herbicide before planting and then using a wheel finger weeder later on. This method resulted in taller plants, longer cobs, more grains per cob, and heavier grains. It also led to higher profits and reduced weeds significantly. The worst method was not using any weed control, which resulted in more weeds and lower profits.