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SarahAlsalihi	Tue, 05/26/2015 - 16:37	60	view

Topic title: Earthworms have a beneficial effect on the physical and chemical properties of soil. Earthworms change the structure of the soil and improve water drainage. As earthworms dig through compacted soil, they ingest the soil and grind it up. They move organic

Topic category: Integrated TOEFL Writing