Fig. 6. Effect of plant density and removal on kernel number per row for three corn hybrids. R₀, R₁, R₂, and R₃ are no removal and removal of alternate plants at vegetative, tasseling, and early grain-filling stages of growth, respectively. Data points represent plant densities after thinning. Results and significant trends are average of 2 yr except for 2000. L, Q, and NS represent linear, quadratic, and nonsignificant response, respectively. Significant at P = 0.05; **Significant at P = 0.01.