Soil: What It Is and What It Does
Explains that different kinds of soil are mixtures of sand, clay, and humus; tells how the weathering of rocks helps make soil; includes simple experiments to show the kind of soil in which different plants grow well.
- Year: 1966
- Country: United States of America
- Genre: Documentary
- Studio: Coronet Instructional Films
- Keyword: soil science, soil
- Director:
- Cast: