It's called baleage when you wrap wet hay. moisture content is absolutely critical. A little to dry and you have heating at the core witch makes it worthless as feed. Although a spray on product called Hay-Saver will keep it from heating up so much. I don't have any idea how it works.
That conditioner is also called a crimper. It breaks or crushes the stem allowing for faster drying time and also makes the hay softer and more palatable if feeding as dry hay.
