1940 – Irrigation of Agricultural Lands – Statistics – Irrigated farms and tenure of farm operators, 1940 and 1930; irrigated area, 1939, 1929, and 1919; irrigable area and capital invested, 1940, 1930, and 1920; maintenance and operation, charges, and indebtedness, 1939 and 1929; and in irrigated farms, 1940; water delivered to irrigators and drainage of irrigated land, 1939
