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er, can retaln, soft,, epth and, It is called the topsoil, This provides shelter for, ers are referred to as, lav, 1 di, ус, du, ter, A-horizon, ti, B-horizon, C-horizon, Bedrock, Fig. 9.3 Soil profile, ly see the top surface of, the layers below it. If we, des of a recently dug ditch, organisms such as worl, The r, he inno