Treesearch

Presents the resource manager with a key to the recommended practices for managing balsam fir stands, especially for timber. Discusses control of growth , establishment, composition, and damaging agents; also discusses managing for boughs and Christmas trees, wildlife habitat, esthetics, water. Includes information on estimating yield and growth.

The Michigan 1987 inventory update, derived by using tree growth models, reports 17.3 million acres of timberland, a decline of less than 1% since 1980. Growing-stock removals have risen sharply since 1979, climbing from 275 million cubic feet annually to the current level of 398 cubic feet.

The symposium presents and discusses new information on the hardwood resource, silviculture, harvesting, economics, and product potential from hardwood thinnings in the Lake States. Included are forest management perspectives from the logger, private industry, and state and federal forest managers.

Effects of fire on the oak timber type are reviewed. Many oak stands of today originated under severe fire regimes. Fire can ill or injure oak trees. Factors determining direct injury or mortality from fire include: season of year; bark characteristics; size, vigor and form of tree; fire characteristics and stocking level.

The jack pine ecosystem has evolved through fire. Jack pine, although easily killed by fire, has developed serotinous cones that depend upon high heat to open and release the seeds. Without a fire to enable the cones to open, jack pine would be replaced by another species. Prescribed fire can be an economical management tool for site preparation in either a natural or artificial regeneration system.

Reviews research evaluation techniques in a variety of fields an assesses the usefulness of various approaches or combinations of approaches for forestry research evaluation. Presents an evaluation framework that will help users develop an approach suitable for their specific problem.

Lake States pulpwood production fell from 7.19 million cords in 1984 to 6.84 million cords in 1985. Pulpwood production is shown by county and species group in Michigan, Minnesota, and Wisconsin

Illinois'' 4,029,900 acres of timberland supported 4.8 billion cubic feet of growing stock in 1985. An increase of 40 percent since 1962. White oak is the most abundant tree species. Pope County in southern Illinois contains the most timber volume.

The fourth inventory of Wisconsin''s forest resources shows a 39-percent increase in growing-stock volume between 1968 and 1983, from 11.2 to 15.5 billion cubic feet.

In 1985 the forests of Illinois covered 4.3 million acres, an increase of 5.7 percent from the 4.0 million acres found in 1962.