Weed Emergence from Two Soils at Various Moistures, Temperatures, and Depths
- 1 April 1967
- Vol. 15 (2) , 118-+
- https://doi.org/10.2307/4041178
Abstract
Under controlled conditions in a growth chamber, emergence of tumblegrass (Schedonnardus paniculatus (Nutt) Trel.), redroot pigweed (Amaranthus retroflexus L.), and barnyardgrass (Echinochloa crusgalli (L.) Beauv.) was best with an 8-hr. night temperature of 65 F and a 16-hr. day temperature of 80 F. Other temperature ranges, in order of decreasing effectiveness in stimulating emergence, were 80-95, 50-65, and 35-50 F. Best emergence occurred at the 1/2-in depth of planting followed by 1/4, 1,2, and 4 in. Barnyardgrass was the only weed that emerged appre- ciably from the 4-in depth. Average emergence was better on a coarse-textured soil than on a fine-textured soil. Under dry soil conditions, emergence was reduced by soil crusting.This publication has 0 references indexed in Scilit: