Soil
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Episode of Series “Understanding Our Earth”. An explanation of soil profile (topsoil, subsoil, mantle rock and bed rock); plus a visual breakdown of the elements of soil (sand, decaying plant and animal matter and clay). Explains how soil is produced, discusses methods of soil conservation and describes types of soils found throughout the United States.
Sources
- 16mm Filmography (legacy record) — title, description, catalog record
Original permalink · Record added 2026-01-23 04:03:26