The fourth inventory of Minnesota's Prairie Unit shows that although commercial forest area decreased 31.7% between 1962 and 1977, growing-stock volume increased 22%. This report gives statistical highlights and contains detailed tables of forest area as well as timber volume, growth, mortality, ownership, and use.
Hahn, Jerold T.; Smith, W. Brad. 1980. Timber resource of Minnesota''s Prairie unit, 1977. Resource Bulletin NC-45. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station