Deep down and dirty : the science of soil / produced and directed by Graham Russell ; BBC Scotland.
It takes a thousand years to form a single inch of soil. It is a fragile layer on the surface of the land - yet essential to all life on Earth. But where did soil come from and how was it made? Gardening expert Chris Beardshaw reveals the secrets locked within soil. Travelling around in his speciall...
Full description
Saved in: