Agricultural Productivity as a component in the levels of regional development in Bihar,it is a study of the regional patterns of agricultural productivity,levels of regional development and their interrelationships.The book examines regional patterns of agricultural productivity in detail and analyses their socio-economic and environmental correlates which are the likely causes of spatial variation in the agricultural productivity and regional development. Agricultural productivity is viewed as a measure of efficiency with which the agricultural system in the region works. As such,variations in the agricultural productivity reflect disparities in the use of agricultural resources in the area at the level of districts. Since agriculture is the mainstay of the economy of the region,where about 85 percent of the population is engaged in agricultural activities,differences in the agricultural productivity may be taken as the differences in the economic progress of the region. In other words,if it is presumed that economic and social development goes hand in hand, the agricultural productivity in the region can be taken as the major component of the regional development.