Roughage : It is coarse and fibrous substance hacing low nutrient content. The animal get roughage from green fodder, islage, hay, berseem, cowpea, bajra, maize etc. The roughage constitues the bulk of animal food. It provides carbohydrate to animals and its fibres keep the digestive system in.order,
Concentrate : It is low in fibres butcontains relatively high proteins and other nutrients. It includes cotton seeds, oil seeds, maize,oat, grain, cakes and molasses etc. Concentrate prove animals protein, fat and required minerals.