Coronet Films
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.
Prehistoric Worlds
Closeness to the Land
Springtails: The hidden soldiers of Earth
Permaculture Soils
Au royaume des vers de terre: La vie du sol dévoilée
Botanist Francis Hallé Explains...
The Catastrophe Garden