(n.) The upper layer of soil; surface soil.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). topsoil. Retrieved September 21, 2026, from http://smartdefine.org/topsoil/definitions/2073329 |
| Chicago | Webster's. 2011. "topsoil" http://smartdefine.org/topsoil/definitions/2073329 (accessed September 21, 2026). |
| Harvard | Webster's 2011, topsoil, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/topsoil/definitions/2073329>. |
| MLA | Webster's. "topsoil" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/topsoil/definitions/2073329> |