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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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Género: Documental

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País: United States of America

Tiempo de ejecución: 10 minutos

Calidad: HD

Lanzamiento: 1966

imdb rating 7

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