The 1991 CA is the fourth decennial census of agriculture under-taken by the NSO. The previous census was undertaken in 1981 with 1980 as the reference period. Prior to the 1980 census were the 1971 and 1960 CAs. On a limited scale, the CA’s was conducted in 1903, 1918, 1939, and 1948 together with the census of population. However, only the postwar census results are available.