| 摘要 |
A weed control system has an opaque portion and a growth promoting portion. The opaque portion blocks passage of light therethrough and blocks passage of seedlings growing from weed seeds in a ground region. The growth promoting portion is adapted to be disposed between the opaque portion of the system and the ground region. The growth promoting portion promotes germination of the weed seeds and the resulting weed seedlings die as the opaque portion prevents any light from reaching the seedlings.
|
