I baled my hay a little too wet, now it's beginning to heat. Should I be worried? There are a lot of reasons given for hay being baled before it has dried thoroughly in the field. But, whatever the reason, questions and concerns about hay heating reach my office throughout the summer harvest season. It is a good practice to check baled hay 4 or 5 days after baling for its initial temperature rise level. Some guidelines for handling hay that is heating in storage are provided below according to temperature range.
Iowa State University
Barnhart, Stephen K., "Hot hay! How hot is too hot?" (1998). Integrated Crop Management News. 2282.
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