
Fig. 4. Nonmetropolitan population change by economic subregion, 1970-1976.
[From 1979 Handbook of Agricultural Charts (USDA/ESCS Agriculture Handbook
561), 1979.]
| 1. northern New England-St. Lawrence | 2. northeastern metropolitan belt |
| 3. Mohawk Valley and New York-pennsylvania border | 4. northern Appalachian coal fields |
| 5. lower Great Lakes industrial | 6. upper Great Lakes |
| 7. dairy belt | 8. central corn belt |
| 9. southern corn belt | 10. southern interior uplands |
| 11. southern Appalachian coal fields | 12. Blue Ridge, Great Smokies, and Great Valley |
| 13. southern piedmont | 14. coastal plain tobacco and peanut belt |
| 15. old coastal plain cotton belt | 16. Mississippi delta |
| 17. Gulf of Mexico and South Atlantic coast | 18. Florida peninsula |
| 19. east Texas and adjoining coastal plain | 20. Ozark-Ouachita uplands |
| 21. Rio Grande | 22. southern great plains |
| 23. northern great plains | 24. Rocky mountains, Idaho-Utah valleys, and Columbia Basin |
| 25. north Pacific coast (including Alaska) | 26. the southwest (including Hawaii) |