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How could removing earthworms in a yard affect the ecosystem?

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Lack of nutrition for your yard could be a negative result of the removal of the earthworms. Earthworms dig deep into the ground to give plant roots a bigger space to grow in, which promotes grass growth.
User Christophano
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Answer:

Lack of nutrition for your yard could be a negative result of the removal of the earthworms. Earthworms dig deep into the ground to give plant roots a bigger space to grow in, which promotes grass growth.

Hope this helps!

User Eimear
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