remineralizers1 Nov 2018 13:43
Just to clarify
The volcanic rocks often contain very good levels of essential macro and micro elements and micro-nutrients. Rock-dust on it's own is not a fertiliser, for it lacks the qualifying levels of nitrogen, potassium and phosphorus.
The benefit of the addition of a quality volcanic rock dust to the soil is in the remineralisation that takes place. This is the return of minerals to the soil which had been lost by erosion, leaching, and / or over-farming.
Volcanic Rock dust can be added to soil to improve fertility and has been tested since 1993 at the Sustainable Ecological Earth Regeneration Centre (SEER Centre) in Straloch, near Pitlochry, in Perth and Kinross, Scotland. Further testing has been undertaken by James Cook University, Townsville, Far North Queensland.
SEER’s research claims that the benefits of adding rock dust to soil include increased moisture holding properties in the soil, improved cation exchange capacity and better soil structure and drainage. Rock dust also provides calcium, iron, magnesium, silica, phosphorus and potassium, plus trace elements and micronutrients. By replacing these leached minerals it is claimed that soil health is increased and that this produces healthier plants.