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 :