Orientation, Position of Bihar State in India, Administrative Divisions, Physical Conditions, Physiography, Geology, Minerals, Normal Monthly and Annual Rainfall, Demographic Structure and Trends, Distribution of population, Variation in Density of population, Immigrants (proportion of Immigrants to total population), Sex ratio (Number of females, per 1,000 males, ), Economic Aspects, Land Utilisation, Intensity of Cropping, Acreage under major cereals, Pulses and Oilseeds, Commercial crops, Area Irrigated by various sources.