At 03:45 09-11-2005, Linda Foulis wrote: >How can micronutrients be derived from granite grit? Especially in a >growing season, or even 10 growing seasons for that matter. I can maybe see >it if using a sandstone grit, if there is such a thing. >All the granite I've ever come across has been an extremely hard rock and >not inclined to erosion or break down in which micronutrients would be >released, at least not in my life time. > >Linda >Okotoks, AB >Canada Linda, I know only organic soils. In these, both the humus (acidic) and the bacteria will wear on the granite and dissolve it. And I am certain that other denizens of the underground would help. Carol