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Best Practice Do’s and Don’ts for Anhydrous Ammonia Applications

With harvest wrapping up in many parts of the Midwest, it’s only natural that farmers are thinking about fall field practices they want to complete now. However, one of those is underway too early in parts of Iowa, according to Angie Rieck-Hinz.

“There’s a lot of anhydrous going on fields too early, it’s just too warm and dry yet,” says Rieck-Hinz, a field agronomist in north-central Iowa for Iowa State University Extension.

Instead, she advises growers to wait until soil temperatures are no more than 50 degrees Fahrenheit – and trending downward – before making anhydrous ammonia (NH3) applications for the next year’s corn crop. Plus, soil moisture conditions need to improve in the state which saw a lot of dry conditions over the summer.


October 25, 2023



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