Final answer:
Wheat silage should have no more than 40% moisture to prevent spoilage and the growth of harmful microorganisms.
Step-by-step explanation:
Wheat silage should be harvested and stored with no more than 40% moisture. Silage is a type of feed made from fermented crop material and is commonly used to feed livestock. If the moisture content of the wheat silage exceeds 40%, there is a risk of spoilage and the growth of harmful microorganisms. To ensure the proper moisture level, farmers use various techniques such as drying the silage before storage or using additives to reduce moisture.