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| john h,
Not sure what geography or soil type is of interest to you, but some long-term farmer experiences are reported in Leading Edge magazine (see link below), as well as studies of changes in soil properties:
http://www.notill.org/leading_edge.htm
Of the Featured Farmers, those with ~ 15+ yrs of NT experience farm-wide would include Lanier in Alberta, Watsons (NE), Forgey (SD), Holzwarth (SD), Arnoldy (SD), Gillen (SD), Thompsons (KS), Palen (KS), and Stehlys (SD).
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any long term no-tillers?
