| The New Dictionary of Cultural Literacy, Third Edition. 2002. |
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| topsoil |
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| The thin, rich layer of soil where most nutrients for plants are found. | 1 |
| ‡ Most of the land-based biological activity of the Earth takes place here. | 2 |
| ‡ The loss of topsoil through erosion is a major agricultural problem. | 3 |
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| | | The New Dictionary of Cultural Literacy, Third Edition. Edited by E.D. Hirsch, Jr., Joseph F. Kett, and James Trefil. Copyright © 2002 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
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