Martinsville, Ohio | Indeed, many farms in a corn soybean rotation are seeing soil organic matter levels go down. Our methods tend to burn up more than we deposit.
University of Illinois has seen the same thing happen at the Morrow plots since they were started in the early 1900's.
https://www.google.com/search?q=univ+of+illinois+morrow+plots+show+organic+matter+decreasing&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7ADRA_enUS421
Ed
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Organic Matter Going Down In No-Till
