Why do farmers wrap hay stacks in plastic?

Farmers wrap hay stacks in plastic to protect the hay from moisture, mold, and spoilage. This method helps preserve the quality of the forage by creating an airtight seal that minimizes exposure to air and contaminants. Additionally, wrapping hay can extend its storage life, allowing farmers to feed it to livestock during the winter months when fresh pasture is unavailable. This practice ultimately helps improve feed efficiency and reduces waste.