- C-1: Even-Aged Spruce-Balsam Fir Stands
- C-2: Elm-Ash-Cottonwood
- C-3: Nearly Pure Even-Aged Eastern White Pine
- C-4: Jack Pine
- C-5: Even-Aged Management of Northern Hardwoods
- C-6: Red Pine
- C-7: Upland Central Hardwoods
C-7: Upland Central Hardwoods
Note: For average tree diameters of 7 to 15 inches, use Chart A.
For average tree diameters of 3 to 7 inches, use Chart B.
Source: Sandler, I. L. 1977. Manager’s Handbook for Oaks in the North Central States (General Technical Report NC-37). USDA Forest Service, North Central Forest Experiment Station, 1992 Folwell Avenue, St. Paul, MN 55108. p. 29.