How to convert agricultural wastes for useful purposes?

Many farmers that gain agricultural wastes such as manure can then use it as fertilizer on their fields. The general rule of thumb is that each cow needs an acre of land to spread her manure on. The key practice that needs to be involved to convert the waste is: collection and redistribution. Done incorrectly this could cause contamination of water sources. You should always contact your local USDA offices for information before spreading near waterways.