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A good study, Manure, crop residue & Building soil O.M.
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mafrif
Posted 12/1/2011 17:20 (#2079054 - in reply to #2077855)
Subject: Re: A good study, Manure, crop residue & Building soil O.M.



NC Iowa
Interesting that they only needed to add 4 tons of manure (20% dry matter *20 tons), to keep the soil in similar condition while removing 7-10 tons of dry matter in grain and stover.

20 tons sounds like a lot but in comparison to removal it's only 50%.

Look at it like that you can "rape" the land, full till it and it still maintains OM with some litter.
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