| Columbia Encyclopedia. 2001-2008. | | | | marl, type of soil |
| | | or bog lime, soil, essentially clay mixed with carbonate of lime, highly valued as a dressing or fertilizer. It crumbles rapidly and easily. Marl in which the lime is in the form of invertebrate shells is called shell marl. The term is loosely used for a variety of soils, some of which are low in lime content, e.g., the greensand marl of New Jersey. Marling of soil tends to lighten it, correct acidity, and promote nitrification. | | |
| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2008 Columbia University Press. |
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