Fig. 3. Inhibitory effect of three cover crop species and three grass weeds (barnyardgrass, bristly foxtail, and large crabgrass) on total number of cotton bolls (TNCB), percentage of open cotton bolls (POCB), and cotton lint yield (CLY) in inter-row cultivated and no-cultivated plots. Columns within each graph with different letter indicate significant difference at P < 0.05. B, barley; R, rye; T, triticale; C, mulch-free (control).