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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.
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Genre: Documentaire

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Pays: United States

Durée: 10 minutes

Qualité: HD

Libération: 1966

Soil: What It Is and What It Does (1966) - IMDb  6