This document classifies livestock feed and forages into several categories: cultivated fodder including green/succulent, dry, and supplements/additives; natural vegetation including grasslands, pasture, and trees; concentrates that are rich in carbohydrates, protein, or both moderate; and roughages versus concentrates based on their crude fiber and nutrient content. It further categorizes roughages into maintenance type for cereal fodder and hay, production type for leguminous fodder and hay, and sustenance type for straw and stovers based on their digestible crude protein percentage.