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Question: I am trying to do a better job of providing my corn crop with nitrogen when it needs it. Can you tell me anything about the nitrogen requirements corn needs early in the season?
Answer: From emergence through knee-high, you want to ensure that your corn crop nitrogen levels don’t fall below 10 parts per million in the top 12 inches of soil. From knee-high on, after the corn roots have some depth, you want to maintain 20 parts per million of nitrogen in the top 2 feet.
You really can’t overestimate the importance of nitrogen to your corn crop throughout the season. I’d encourage you to read Darrell Smith’s article, The Challenge of Nitrogen, in the December issue of Farm Journal to learn more. Plus, I’m providing some links to additional information below for your reference.
A Strong Start with Nitrogen Management
Ken Ferrie explains why fertility is the foundation for the Systems Approach pyramid and key to increasing corn yields. Ken Ferrie explains why fertility is the foundation for the Systems Approach pyramid and key to increasing corn yields.
Start Planning for 2012 Corn Nitrogen Management
Now, as soil temperatures cool down, is the time to plan your nitrogen management for next year.
Know How Your Corn Hybrid Utilizes Nitrogen
Know how your corn hybrid uses nitrogen for good performance. Know How Your Corn Hybrid Utilizes Nitrogen Question: I know you say understanding how your corn hybrids use nitrogen is important, but I’m not sure why. I’m picking hybrids for next year and would like to know about that.