At the Agvise Soil Fertility Seminar in Grand Forks, Soil Scientist John Breker said these levels have not been seen in more than 30 years. “The most obvious thing that anybody that poked a hole in the ground found was lots of residual nitrate left after any nitrogen requiring crop, whether it was wheat, canola or corn.” That provides an economic opportunity to use the residual nitrate, especially with the current fertilizer prices. That information can be used to establish a realistic yield goal. “The one thing you should be cognizant of is if you have any volunteer cereals that have taken up some nitrogen, especially considering volunteer wheat may have gotten ahead of you and started heading again. Some of that nitrate isn’t going to be around to mineralize for that next crop.”
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