Forage crops are crops grown specially to be grazed by livestock or conserved as hay or silage. Forage crops assist in achieving production targets for attributes such as growth or weight gain and to make up seasonal short falls between feed demand and supply. They can also play an important role in maintaining ground cover, preventing erosion, accumulating nitrogen in the soil and improving land condition. Fodder is a traditional crop in Pakistan. In the irrigated tracts it is usually grown under basin irrigation which makes mechanical harvesting very difficult, so forages are usually cut by sickle; on barani lands the fields are usually levelled terraces