Treesearch

Established populations of an exotic bark beetle, the larger pine shoot beetle [Tomicus piniperda (L.)], were first reported in Ohio in July 1992. Subsequent surveys through July 1994 have found T. piniperda in six states in the United States and in one Canadian Province in the Great Lakes region. One-meter-long trunk sections were cut from Scotch pine (Pinus sylvestris L.) trees felled from February through July 1993 in a forested site in southern Michigan, laid horizontally, allowed to undergo natural attack by bark beetles and associates, and later dissected. In southern Michigan in...

Fire scars from natural remnants of red pine (Pinus resinosa Ait.) in an oak-pine forest near Basin Lake, Algonquin Park, Ontario, were dated using dendrochronological methods. A fire scar chronology was constructed from 28 dated fire scars on 26 pine remnants found in a 1 km2 area of this forest. From pith and outside ring date distributions, 2 stand replacement fires are inferred. The composite fire scar chronology spanned 191 years from 1665 to 1856. The fire return interval between 2 stand replacement fires was about 200 years, while the return interval between fires of moderate or...

Reports findings of a survey of all primary wood-using mills in North Dakota in 1993 and compares those findings with earlier surveys. Production and receipts of industrial roundwood are reported by product, species, and county. Also reports the quantity, type, and disposition of wood and bark residues generated by North Dakota's primary wood-using industry.

Discusses recent Wisconsin forest industry trends; production and receipts of pulpwood, saw logs, and veneer logs; and production of other timber products in 1992. Reports on logging residue, on wood and bark residue generated at primary wood-using mills, and on disposition of this mill residue.

Presents a listing of 719 citations related to eastern redcedar through September 1994. Major eastern redcedar subject headings include: physiology, nursery propagation, regeneration / planting, pests, weather-related factors, control, products, wildlife relationship, and ecological relationships.

Reports findings of a survey of all primary wood-using mills in Michigan in 1992 and compares them with findings from earlier surveys. Production and receipts of industrial roundwood are reported by product, species, and county. Also reports the quantity, type, and disposition of wood and bark residues generated by Michigan's primary wood-using industry.

The inventory of the forest resources of Hiawatha National Forest reports 892.1 thousand acres of land, of which 756.7 thousand acres are forested. This bulletin presents statistical highlights and contains detailed tables of forest area, as well as of timber volume, growth, removals, and mortality.

Describes the performance of an 11-axle logging truck with a central tire inflation system. Results included reduced damages to roads, improved ride of the truck, improved drawbar pull, and reduced rolling resistance. Road construction costs were reduced 62%, primarily due to using 33% less gravel.

Empirically analyzes the evolution of national forest values in recent years. A computerized content analysis procedure was developed and used to analyze the forest value systems of forestry professionals, mainstream environmentalists, and the public. National forest values were found to have shifted significantly over the study period.

Presents equations for estimating biomass of six components on five species of shrubs common to northeastern Minnesota. Regression analysis is used to compare the performance of three estimators of biomass.