He says a dense, competitive crop that quickly shades the soil from the sun will help reduce weed growth.

VOA: special.2011.07.26

He says a dense, competitive crop that quickly shades the soil will help suppress many weeds.

VOA: special.2009.05.26

He says a dense,competitive crop that quickly shades the soil will help suppress many weeds.

VOA: special.2010.08.10

Dense planting of a crop can also act as a natural control.

VOA: special.2009.05.26