6. Acts as a barrier against weeds
Black plastic acts as a barrier against weeds in several ways.
Some seeds need light to germinate, especially small seeds that come from many weeds.
By preventing sunlight from reaching the soil, the germination of many weeds is prevented.
If they germinate and grow, the lack of sunlight causes the seedlings to die because they cannot perform photosynthesis.
In research trials, growing tomatoes in soil covered with black plastic produced only six weeds per square meter, while the control averaged 99.
7. Reduces soil erosion
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