Effect of tillage andZea maysonChenopodium albumseedling emergence and density
We studied the effect of tillage systems (no-till, chisel, and moldboard plow) and the presence or absence ofZea maysL. (corn) on soil temperature, moisture, and, subsequently, the emergence phenology and density ofChenopodium albumL. (common lambsquarters) at two sites (Elora and Woodstock) from 1993 to 1995. The tillage system affected the phenology ofC. albumseedling emergence only in 1995. In that year, more days were required to reach 80% cumulative seedling emergence in no-till than in the chisel or moldboard plow treatments. The delay in obtaining 80% cumulative emergence was attributed to a dry period from days 159 to 177 at Elora and from days 155 and 176 at Woodstock. The presence or absence of Z.maysdid not affect soil temperatures, soil moisture, orC. albumseedling emergence phenologies.Chenopodium albumseedling density was influenced by tillage and environmental conditions. Large variations in seedling density were attributed to environmental conditions. The presence or absence ofZ. maysdid not affectC. albumseedling density.