Silage is defined as a material produced by controlled fermentation of crops under anaerobic condition. The process of preserving feed in the form of silage is called as ensiling. The green fodder harvested at proper stage is stored, packed and compressed in silo and it is then tightly covered to prevent the contact with fresh air. The receptacle or structure in which silage is being prepared is called as silo, it is generally air tight/semi-airtight structure. In India at most of the farms pit silos are more popular than other types