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UpLogin  October 2011 Archive for Ask an Agronomist  RSS By:
Farm Journal Agronomists, Farm Journal   What N Source Is Best
For Sidedress Applications?  Oct 31, 2011  Question: What N
Source Is Best For Sidedress Applications?  Answer: For
sidedress application, farmers have a choice in what nitrogen
product to apply. Many ask if there is an agronomic difference
between 28% and anhydrous ammonia. At sidedress, as far as the
plant’s uptake of the nitrogen, these products will both convert
to nitrate for its uptake. The difference between these two is
their timing for availability. If you had yellow corn, and you
were to sidedress the corn to make it green, 28% has nitrate,
and that turns corn back green. So you’ll see a quicker response
to 28%. Anhydrous ammonia is different. With anhydrous, you
create a core, and it could be 14 days for nitrogen to be
released from that core. If you are sidedressing green corn,
it’ll mineralize back slower and be more