chemical weed control practices

例句：

1. 1. The use of chemical weed control practices has significantly reduced the need for manual labor in agriculture.
   使用化学杂草控制实践显著减少了农业中对手工劳动的需求。
2. 2. The adoption of chemical weed control practices has led to a significant increase in crop yields.
   采用化学杂草控制实践导致农作物产量显著增加。
3. 3. The chemical weed control practices used in this study are effective in controlling weeds in agricultural fields.
   本研究中使用的化学杂草控制实践在农田中有效控制杂草。