Treesearch

Data collected during the 1983 Wisconsin Statewide forest inventory were used to examine operability of the timber resource based on seven operability components. Operability is the ease or difficulty of managing or harvesting timber because of physical conditions in the stand or on the site.

A Delphi exercise is used to identify emerging issues in National Forest management and use, the relative importance of the issues, and barriers to resolving issues. USDA Forest Service managers agree on the importance of the 11 issues identified; however, researchers and National Forest managers do not always agree on the importance of issues or barriers.

The Wisconsin 1987 inventory update, derived by using tree growth models, reports 14.7 million acres of timberland, a decline of less than 1% since 1983. This bulletin presents findings from the inventory update in tables detailing timberland area, volume, and biomass.

Presents fifteen papers and four abstracts in five topic areas: the research process, forestry constructs and innovations, interdisciplinarity, emerging research areas, and assessing research productivity, quality, and motivating scientists.

The report describes 1985 and 1995 levels of forest-related economic activity in the three-state area of Michigan, Minnesota, and Wisconsin, and their impacts on other economic sectors based on a regional input-output model.

Describes integrated control measures involving chemical, cultural, genetic, biological, and legal control methods that can be used to reduce the impact of tree diseases in nurseries.

A coppice and a first-rotation stand of hybrid poplar barely differed in biomass yields beyond age 4. Repeated harvesting of coppice stands under short rotation reduced yields.

Rooting depth and habit of red maple were observed on 60 sites in northern Wisconsin and Michigan as part of a regional soil-site studay. Vertical woody root extension on dry, outwash sites averaged 174 cm, which was significantly greater than the extension on sites with fragipans (139 cm) and on wet sites (112 cm). Site index was higher on wet sites and non-woody root tans proliferated in the subirrigated zone there. Non-woody root fans were observed at depths approaching 3 m on dry, sandy sites.