Fire.
There are little bacteria that *love* to eat hay. They thrive on the sugars and reproduce like crazy for a little while. The problem is that they produce a lot of heat in the process.
No biggie when you’re dealing with haybale-sized bales, there is plenty of room for the heat to dissipate.
When you stack the bales, though, the heat has a harder time getting out. It’s very easy for the temperature inside the stack to exceed the hay’s ignition point. It just gets to hot and the hay catches fire.
Hay has a lot of little stem that make it up, so *lots* or surface area. Lots of things that are easy to burn. A hay fire, once started, is nearly impossible to put out.
So it’s easier to just let the hay dry in the field, where it’s unlikely to burn up.
Latest Answers