The two categories of land not available for cultivation are: 1. Culturable Waste: The ‘culturable waste’ is the land available for cultivation but not used for cultivation for one or the other reasons such as lack of water, salinity or alkalinity of soil, soil erosion, waterlogging, an unfavorable physiographic position or human neglect. 2. Fallow Land: This category includes all that land which was used for cultivation but is temporarily out of cultivation. Fallow land is left uncultivated from 1 to 5 years to regain its fertility in the natural way depending upon the nature of soil and the nature of farming. There is a need to reduce the extent and frequency of the fallow land in order to increase agricultural production. Fallow land can be improved by proper dose of fertilizers, providing irrigation facilities, crop rotation, etc.