A topsoil calculator determines how many cubic yards of topsoil you need to cover a garden bed, lawn, or landscaping area. Topsoil is the upper 2–8 inches of soil — the biologically active layer where plants grow.
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Pro Tip
Mix topsoil 50:50 with compost for garden beds — pure topsoil often compacts and drains poorly. Order from local suppliers; topsoil is heavy and expensive to ship. Test pH before planting (most vegetables prefer 6.0–7.0).
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Did You Know?
It takes 500–1,000 years for 1 inch of topsoil to form naturally through weathering and biological activity. The US loses about 1.7 billion tons of topsoil to erosion annually — one of the most serious but least-discussed environmental issues.
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