Row widths continue to decrease as time moves forward. Current row widths employed by producers typically vary from 15" to 38", with most producers at 30" today. Yet more and more acres are planted to narrower row widths. In general, this means 15" or 20" row widths. Numerous advantages exist with narrower row widths; these include using the same planting equipment for corn and soybean, reduced weed competition, increased shading of the soil, increased light interception per plant, and less in-row crowding. Plant populations continue to increase every year (400 plants per acre per year).