Single or multiple bales can be sealed by manually stretching plastic across the exposed ends. More expensive wrappers completely cover each bale by elevating the bale onto a rotating and revolving platform. Some have hydraulic lifts to elevate the bales onto the platform. Others require a second tractor with lifting capabilities to put the bale on the wrapper. Any holes made during bale transport and placement into storage should be repaired immediately by taping.
Holes allow oxygen to enter and lead to problems with silage quality due to aerobic deterioration.
To minimize storage losses due to spoilage, bagged silage bales should be fed during the winter following their production. Don't feed silage that has significantly deteriorated or that has a bad odor. Silage that improperly ferments from being too wet can lead to botulism poisoning. Exposure to oxygen can also lead to deteriorated silage and animal toxicity. Un-repaired holes or having too few layers of stretch wrap plastic can lead to oxygen infiltration of the bale.