The U.S. Census of Agriculture is provided by the USDA (not the Census Bureau). Historical years are in the process of being scanned and made searchable by Cornell University via their AgCensus website.
Query the Census of Agriculture database to retrieve customized tables with Census data at the national, state and county levels as far back as 1997.
Other Specialized Censuses
The best starting point for searching the Census is American FactFinder; however, when looking for pre-1990 data,it may be quicker/better to go directly to a specific subject census. See also the A-Z list of topics available from the Census website.
The Census of Governments identifies the scope and nature of the nation's state and local governments; provides figures on public finance and public employment; local government organizations, powers, and activities. Especially useful for locating city and state expenditures for specific services and agencies. Data goes back to 1957.
The Consumer Expenditure Survey provides data about the buying habits of American consumers. It is the only Federal survey that provides information on the complete range of consumers' expenditures and incomes, and the characteristics of those consumers.