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Age and Structure of a Northern Hardwood Selection Forest, 1929-1976

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Since 1938, several selection cuttings have changed a northern hardwood stand from one composed principally of sawtimber to one with a reasonably well-balanced distribution of size classes. Continual ingrowth into the small size classes promises a periodic yield. Sugar maple (Acer saccharum Marsh.) tree diameters now reflect age quite accurately; in the original tract 300-year-old trees ranged from 12 to 32 inches in d.b.h.

The average age of 20- to 24-inch trees has been reduced nearly 100 years and that of 4-inch trees from 100 years to 48. Average age-height relations are surprisingly close to the probable site index, an indication that trees are suppressed for a much shorter time than formerly. Cull percents have dropped since 1938 and the average tree quality has improved. Species composition has changed little.

Document Type: Journal Article

Affiliations: Principal Plant Physiologist at the Northern Hardwoods Laboratory, North Central Forest Experiment Station, USDA Forest Service, Marquette, Michigan

Publication date: January 1, 1977

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  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

    2015 Impact Factor: 1.476
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