Covering the garden soil with black plastic prevents soil erosion due to irrigation or natural rainfall.
Plastic helps control and slow down surface water runoff, meaning less soil is washed away by erosion, thus minimizing damage.
8. Sterilizes the soil to kill unwanted pests and diseases.
Repeated use of the same garden soil or potting mix can lead to an accumulation of weed seeds, fungal spores, harmful pathogens, and other pests that are detrimental to the garden.
Solarization, which involves placing black plastic on the ground to heat it to temperatures that sterilize it, is a process used to rid the soil of these problems.
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