Effect of Glufosinate-Resistant Corn (Zea mays) Population and Row Spacing on Light Interception, Corn Yield, and Common Lambsquarters (Chenopodium album) Growth1

By Brent E. Tharp, J. J. Kells. Weed technology, 2001

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Conventional and glyphosate-resistant maize yields across plant densities in single- and twin-row configurations (2011, background): “As crop row widths ecrease, less light transmission to the soil surface diminishes weed mergence and creates an advantage for the crop (Forcella et al., 992; Shrestha et al., 2001; Teasdale, 1995; Tharp and Kells, 2001).”
Weed management using crop competition in the United States: A review (2017, background): “Increasing the corn population from 59,300 to 72,900 plants ha 1 reducedweed seed production by 50% and improved corn yields (Tharp and Kells, 2001).”
Improving weed management and crop productivity in maize systems in Zimbabwe (2004, background): “The reduction in weed biomass was associated with reduced PAR transmittance to the weeds under the maize canopy when the maize density was increased and/or maize rows narrowed (Teasdale, 1995; Tollenaar et al., 1994; Begna et al., 2001; Tharp and Kells, 2001).”
Comparison of the critical period for weed control in wide- and narrow-row corn (2004, background): “In addition, reductions in early-season light transmittance as a result of narrowing row widths are minimal with similar levels of transmittance after complete canopy formation (Teasdale 1995; Tharp and Kells 2001).”