![Soil: What It Is and What It Does](https://image.tmdb.org/t/p/w300/rfjIwilNlsc3ELNdcDGHHBeumyI.jpg)
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.
- 类型: 纪录
- 工作室: Coronet Instructional Films
- 关键词: soil science, soil
- 投: