By Roy Ulrich, technical agronomist for Dekalb and Asgrow, Southern Ohio
Adequate rates of nitrogen available to a corn plant during the entire growing season is a foundation to a successful harvest. This fact is foundational that Fred Below from the University of Illinois in his “Seven Wonders of the Corn Yield World” ranked nitrogen as the second most important factor in corn yield, only to be outdone by weather.
If nitrogen is that critical to a successful crop, then what is the correct rate of nitrogen for an acre of corn? The old school approach would be to take a yield goal and multiply it by 1.25 pounds per bushel so a 250-bushel per acre yield goal would require an application rate of 312 pounds per acre of nitrogen. As most know, nitrogen isn’t quite this simple and isn’t this cut and dry when it comes to final yield.
When it comes to actual nitrogen rates, like most good agronomy answers, when it comes to nitrogen needed “it depends” is the correct answer.… Continue readingRead More »