This chapter examines how efficiently farmers are using various farm inputs in crop cultivation, which has been an important issue of research in the context of agrarian crisis and reduced farm income. Many studies from India seem to suggest that the farm inputs are mostly used suboptimally. Is this true now across different crops and states? Utilizing spatial and temporal data, chapter 12 attempts to find out the efficiency of different inputs used for cultivating different crops namely paddy, wheat, gram, groundnut, cotton and sugarcane. Estimating results from well constructed regression models, it provides solid answers whether the value of crop output per unit of input generated in terms of INR has increased consistently over the years in both foodgrain and non-foodgrain crops. Further, it also addresses the reasons for reduced input use efficiency in certain crops.