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2. Introduction

1. Total Annual Precipitation: 1978 and 1977

2. Percentage of Normal Annual Precipitation: 1978 and 1977

1. Regions and Divisions of the United States

2. 17 Western States and Louisiana and All Other States

1. General Explanation

Maps

1. Irrigated Land in Farms: 1978

2. Irrigated Pastureland and Rangeland: 1978

Charts

1. Acres Irrigated: 1935 to 1978

2. Percent Change in Acres Irrigated: 1974 to 1978

3. Irrigated Cropland as a Percent of Total Cropland Harvested: 1978

4. Specified Crops by Percent of Acres Irrigated: 1978

5. Specified Crops Harvested by Acres Irrigated: 1978

Tables

1. Irrigated Farms and Land: 1954 to 1978

2. Trends in Irrigated and Nonirrigated Farms by States: 1978, 1974, and 1969

3. Farms, Land in Farms, and Land Use, by Size of Farm: 1978 and 1974

4. Irrigated Land Use: 1978

5. Farms and Acres Irrigated and Selected Characteristics of Irrigated and Nonirrigated Farms: 1978, 1974, and 1969

6. Value of Agricultural Products Sold From Irrigated Farms by States: 1978

7. Standard Industrial Classification of Irrigated Farms by States: 1978

8. Specified Crops Irrigated: 1978 and 1974

9. Berries: 1978

10. Grains - Corn, Sorghums, Wheat, and Other Small Grains: 1978

11. Cotton, Tobacco, Soybeans, Dry Beans and Peas, Potatoes, Sugar Crops, and Peanuts: 1978

12. Field Seeds, Grass Seeds, Hay, Forage, and Silage: 1978

13. Vegetables, Sweet Corn, and Melons, Harvested for Sale: 1978

14. Other Crops: 1978

15. Specified Crops Harvested - Yield Per Acre Irrigated and Nonirrigated: 1978

1. General Explanation

Maps

1. Water Resources Regions and Subregions

Charts

1. Percent Change in Acres Irrigated by States: 1969 to 1978

2. Source of Water as a Percent of Total Water Supply by States: 1978

3. Irrigation Organizations, Acres Irrigated, and Water Delivered to Farms and Ranches as a Percent of Each Total, by States: 1978

4. Irrigation Organizations, Acres Irrigated, and Water Delivered to Farms and Ranches as a Percent of Each Total, by Type of Organization: 1978

Tables

1. Farms, Irrigated Land, and Irrigation Organizations: 1940 to 1978

2. Types of Irrigation Organization and Acres Irrigated by States: 1940 to 1978

3. Sources and Disposition of Water by States: 1978, 1969, and 1959

4. Water Acquisition and Disposition by Type of Irrigation Organization: 1978

5. Acres Irrigated in 1978 Compared With the Average Acres Irrigated 1975 Through 1977 and Quantity of Water Delivered Compared With Normal Amount Delivered: 1978

6. Natural Sources, Imports, Exports, and Net Water Supply: 1978

7. Net Water Supply, Disposition and Exchange Between Irrigation Organizations: 1978

8. Origin of Water Imports by Area: 1978

9. Origin of Water Exports by Area: 1978

10. Method of Water Distribution on Acres Irrigated Served by Irrigation Organizations: 1978

11. Water From Other Sources: 1978

12. Agricultural Land Taken Out of Production in Areas Served: January 1970 to December 1978

13. Proportion of Water Measured: 1978

14. Irrigation Organizations Reporting Measuring Devices Used and Frequency of Water Measured: 1978

15. Water Control Facilities by Type of Irrigation Organization: 1978

16. Water Pumps by Use: 1978

17. Water Conveyance Facilities by Type and Size: 1978

18. On-Stream Reservoirs With Capacities of 1,000 Acre-Feet of More: 1978

19. Off-Stream Reservoirs With Capacities of 1,000 Acre-Feet of More: 1978

20. Operation and Maintenance Costs, Including Fuel and Energy Expenses, by Type of Irrigation Organization: 1978

21. Operation and Maintenance Costs, Including Fuel and Energy Expenses: 1978

22. New Capital Investment by Type of Irrigation Organization: 1970 to 1978

23. New Capital Investment: 1970 to 1978

24. New Capital Investment and Estimated Investment: 1939 to 1978

25. Debts Outstanding by Type of Irrigation Organization: December 31, 1978

26. Debts Outstanding: December 31, 1978

27. Revenue From Water Users and Other Irrigation Organizations by Type of Irrigation Organization: 1978

28. Revenue From Water Users and Other Irrigation Organizations: 1978

29. Selected Characteristics of Irrigation Organizations by Farms and Ranches Served: 1978

30. Selected Characteristics of Irrigation Organizations by Acres Irrigated: 1978

31. Selected Characteristics of Irrigation Organizations by Water Conveyed: 1978

32. Selected Characteristics of Irrigation Organizations by Miles of Conveyance Facilities Operated: 1978

33. Selected Characteristics of Irrigation Organizations by Amount of Operation and Maintenance Costs: 1978

34. Selected Characteristics of Irrigation Organizations by Amount of Revenue Received: 1978

35. Selected Characteristics of Irrigation Organizations Serviing Nonfarm Users: 1978

36. Exchange of Water With Other Irrigation Organizations: 1978

1. Appendixes