Fig. 5. Grain yield of corn in weed-free and weed-infested conditions, as affected by cultural practice combinations at Akron, CO. Conventional system was 37000 plants ha^-1 at a row spacing of 76 cm, with N fertilizer broadcast at planting. Cultural practices were banding N by the seed (Cult. 1), increasing crop density to 47000 plants ha^-1 (Cult. 2), and reducing row spacing to 38 cm (Cult. 3). Data are averaged across 2 yr. Bars with the same letter are not significantly different based on Fisher's LSD (0.05).