Farms classified by major source of income - Value of all farm products sold, traded, or used by farm households and value of major source; with farms reporting and income from dairy products sold or traded; for the United States: 1939
Livestock and livestock products - Farms reporting, number, and value of all cattle and cows kept for milk and for beef, and farms reporting, quantity, and value of dairy products, 1840 to 1940; with similar data for other specified classes of livestock and livestock products, 1940 and 1930; for the United States
Classification by number of cows milked - Farms reporting, number of cows milked, and milk production, 1939 and 1929; butter churned and dairy products sold, 1939; and number of cows kept mainly for milk production, 1940; with specified averages and percentages; for the United States
Classification by number of chickens on hand - Farms reporting and number of chickens on hand, 1940, 1935, and 1930; eggs produced and chickens raised, 1939, 1934, and 1929; and chickens sold, 1939 and 1929; for the United States
The Census of Agriculture, taken every five years, is a complete count of U.S. farms and ranches and the people who operate them. The Census looks at land use and ownership, operator characteristics, production practices, income and expenditures, and many other areas.