Influence of density on johnsongrass (Sorghum halepense) interference in field corn (Zea mays)
1996
Ghosheh, H.Z. | Holshouser, D.L. | Chandler, J.M.
Experiments were conducted from 1990 to 1994 to investigate the density-dependent effects of rhizome and seedling johnsongrass on the magnitude of full-season interference in field corn. Corn grain yield was decreased as rhizome johnsongrass density increased. A maximum density of 3 rhizome johnsongrass plants 9.8 m-1 of row was considered critical to avoid yield losses above 5% of full-season weed-free corn. Interference of johnsongrass plants originating from seed and growing at densities up to 128 plants 9.8 m-1 of row did not affect grain yield. Seedling johnsongrass plants growing at a constant density of 9.8 plants m-1 of row did not affect yield from corn planted at five densities.
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