
Soil: What It Is and What It Does
Soil: What It Is and What It Does
Soil: What It Is and What It Does 다시 보기 온라인 무료 보기. 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.
- 장르: 다큐멘터리
- 국가: United States
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