Originally from: mona parr
                        
Landward programme yesterday quite interesting--talking about soil deficiences and use of volcanic dust left from stone quarrying as fertiliser. Would be interested in analysis of this by-product.

Programme introduction--
Rock Dust
Lindsay Cannon reports from Perthshire where volcanoes are helping grow bigger, better crops.
She meets a Scottish couple who have battled for twenty years to prove their theory that volcanic rock dust can be used as a cheap and effective organic fertilizer.

The success of small scale experiments with a simple, environmentally-friendly alternative to chemical fertilizers have produced such spectacular results on a bleak Perthshire hillside, that the Scottish Executive has decided to provide financial support for the first ever UK field trials of rock dust