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| It is generally good risk management to apply a modest rate of supplemental fertilizer N when using hog manure as the primary source of N for corn.
The problem isn't that the N in hog manure becomes available more slowly than predicted by the manure analysis (most of the N in hog manure is ammonium and does not need to decompose to become available) but rather that hog manure is normally NOT uniform in analysis or application rate.
With 245 lbs of "available" N applied into cool soil, 10 gallons of UAN-28% applied as a carrier for your herbicide program should be more than enough to compensate for the non-uniformity of N availability from hog manure most of the time.
Joel
WIU Agriculture | |
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Hog manure N question
