Grasses can own a considerable, economic effect on crops. The grasses performance and production are the outcomes of genotypic expression as modulated by continuous interaction with the environment to succeed to maximize productivity. Annual and perennial grasses utilizes as cover crops and the grass species farthest valued for using as cover crops. Perennial grass are generality often used in forage crop production to minimize soil erosion and facilitate machinery passage during high soil moisture conditions. we are preferred fast germinating species, even though for cropping systems with multiple season production of the primary crop, even slower fixing crops are appropriate. The book presents a recent literature on the influence of grasses to various environment at the level of physiological processes and the possibility of productive.