In order to save food, they dug the root of weeds as well.

为了节省吃食，他们又在四周挖些草根当粮食。

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For example, it can promote root development in cuttings, stimulate fruit development in the absence of fertilization or, in excess, kill weeds.

比如，在切削部位可以促进根的生长，不受粉的情况下刺激水果发育，过量可以除草。

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Two to three inches of mulch spread around plants, trees and shrubs will slow water evaporation from the soil, help cool root systems and inhibit weeds.

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Not only do their root systems help stabilize soil and inhibit weeds, but they also offer movement, texture and year-round interest even when the blooms have long disappeared.

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