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Soil building for nutrient density
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May 21, 2013
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Cole_Robbie
Tomatovillian™
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,407
I like greensand for potassium and micronutrients. Gypsum is a widely used soil amendment for the clay by farmers in my area. Rock phosphate has been used for a long time by organic gardeners as a phosphorous source.
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