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Old 09-25-2013, 01:03 PM
Skipster Skipster is offline
LawnSite Bronze Member
Join Date: Dec 2010
Location: Billings, MT
Posts: 1,010
WIN from organic sources would probably last just as long as coated synthetics. Remember, N release for coated synthetics is mediated by temperature, so release is slow when its cold and faster when its hot. WIN N from organic sources is mediated by microbial activity -- essentially temperature and moisture. When moisture is not limiting, WIN releases slower when its cold and faster when its hot.

I don't think there's much difference between the two when it comes to overwintering.
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