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Dr. Elaine Ingham delves into the science of the soil in terms of F:B ratios, pH, the Nitrogen Cycle, Biological Farming, No Till, & more!!! Want even more?? You can download The Permaculture Student 2 FREE which was peer-reviewed and edited by Dr. Elaine Ingham along with dozens of other experts - see what fully cited, reviewed, and edited permaculture looks like: www.thepermacul...