单词 | Mollisol |
释义 | Mollisol [`mal·ǝ´säl] GEOLOGY An order of soils having dark or very dark, friable, thick A horizons high in humus and bases such as calcium and magnesium; most have lighter-colored or browner B horizons that are less friable and about as thick as the A horizons; all but a few have paler C horizons, many of which are calcareous. |
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