Table 4 Effect of different periods of weed competition on seed cotton yield yield
From: Cultivation system influenced the critical period for weed control in cotton field
Ultra-narrow row | Conventional | |||
|---|---|---|---|---|
Seed cotton yield /(kg.ha−1) | Ralative yield compared with weed-free treatment /% | Seed cotton yield /(kg.ha−1) | Ralative yield compared with weed-free treatment /% | |
WDa30 | 3313 | 92.5 | 2547 | 84.1 |
WD45 | 3157 | 88.1 | 2294 | 75.7 |
WD60 | 3133 | 87.5 | 1739 | 57.4 |
WD75 | 2539 | 70.9 | 1606 | 53.0 |
WDhar | 2267 | 63.3 | 1570 | 51.8 |
WF30 | 2855 | 79.7 | 1794 | 59.2 |
WF40 | 3122 | 87.2 | 2513 | 82.9 |
WF60 | 3202 | 89.4 | 2581 | 85.2 |
WF75 | 3234 | 90.3 | 2719 | 89.7 |
WFhar | 3582 | 100.0 | 3030 | 100.0 |
LSD 0.05 | 439 | 475 | ||