Why are bale net wrap in white colors?

White plastic-wrapped hay bales are a very common sight on farms. Unlike black, which absorbs heat, white reflects it.

If a bale of hay wrapped in white plastic was sitting in the same conditions as a bale of hay wrapped in black plastic, the black plastic would absorb heat while the white plastic doesn’t.

The white plastic-wrapped hay bale would maintain its temperature for a lot longer. As a result, the film doesn’t become more permeable, which means oxygen can’t enter at nearly as high of a rate as it does for hay that’s wrapped in black plastic.