Building an 8-by-4-foot raised bed and filling it with compost and soil will run about $80, Mr. Wolford figures.
根据沃芙德的计算，垫高一块8x4平方英尺的地，并用混合肥料和土壤填好，这要花大约80美元。
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Let's say you live in Chicago.The city has a heavy clay soil, so many residents opt for raised vegetable beds, says Ron Wolford, who works at the University of Illinois Extension.