化学除草剂或类似玉米麸等自然手段可以抑制杂草的生长。作物密集种植也能作为一种自然控制手段。
Chemical weed killers or natural treatments like corn gluten can suppress weed growth. Dense planting of a crop can also act as a natural control.
他说，经过密植的具有竞争力的作物会很快遮蔽土地，这将有助于抑制杂草生长。
He says a dense, competitive crop that quickly shades the soil will help suppress many weeds.
护根物可以抑制杂草生长，保持土壤水分。
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