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subsoil |
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subsoilLayer (stratum) of earth immediately below the surface soil, consisting predominantly of minerals and leached materials such as iron and aluminum compounds. Humus remains and clay accumulate in subsoil, but the teeming macroscopic and microscopic organisms that make the topsoil rich with organic matter spend little time in the subsoil layer. Below the subsoil is a layer of partially disintegrated rock, and underlying bedrock. Stripping topsoil while clearing land for crop growth or commercial development exposes the subsoil and increases the rate of erosion of soil minerals. subsoil a. the layer of soil beneath the surface soil and overlying the bedrock b. (as modifier): a subsoil plough subsoil [′səb‚sȯil] (geology) Soil underlying surface soil. subsoil The bed or stratum of earth which lies immediately below the surface soil. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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