Treesearch

Timber management activities have clearly accelerated the number and frequency of soil mass movements on the Mapleton District , Siuslaw National Forest as a result of the November 29-December 1, 1975 storm. Exclusive of roads, clearcutting is the most damaging activity.

This report summarizes the findings of a 1972 inventory of the forest land area and timber resources of a 10-county area on California's central coast. Included are detailed tables of area, timber volume, timber growth and harvest, and mortality. The report includes a discussion of the current timber resources and some potential limitations on their availability.

This publication is directed to the analysis of the selection, management, and utilization of Biosphere Reserves as viewed by scientists from the United States and the Union of Soviet Socialist Republics. Soviet papers focus on types of research and monitoring programs that should be developed on Biosphere Reserves, with emphasis on their use in pollutant monitoring. The nature of the U.S. Biosphere Reserves and their current and potential value for research, education,and biological preservation is considered in the U.S. papers. An additional paper provides an international perspective on...

Available information on inventory, growth, price, and consumption trends for western redcedar in Western United States is compiled. The future of western redcedar as a product resource and component of the forest is discussed.

A 51-yr record of observations in stands planted at six spacings, ranging from 4 to 12 ft, illustrates clearly the beneficial effects of wide initial spacing and the detrimental effects of carrying too many trees relative to the size to which they will be grown. Not only are trees larger, but yields per acre are greater at wide spacings.

This paper is a checklist of 277 vascular plant taxa that have been collected or encountered in Abbott Creek Research Natural Area, Oregon; a brief description of five forested and two nonforested vegetation types is included.

This case study tested the common belief that grass seeding is needed to prevent erosion after areas are clearcut in the Blue Mountains. Changes in the soil surface height at about 500 points each in a seedbed and an unseeded area were measured on four dates covering a 20-month period. Average vertical displacement was not consistently related to seeding nor to degree of disturbance. Variability of vertical displacement within areas treated alike was almost as great as variability between treatments. Size-graded fluorescent material (Willemite) was placed on 10 sites to characterize...

Five series of photographs display different forest residue loading levels, by size classes, for areas of like timber type (Sierra mixed conifer and Sierra true fir) and cutting objective. Information with each photo includes measured weights, volumes and other residue data, information about the timber stand and harvest actions, and assessment of fire behavior and suppression difficulty. These photo series provide a fast and easy-to-use means for quantifying and describing existing and expected residues.

Edge can be a measure of overall diversity of any area. Diversity is considered as inherent (community/community) edge, induced cessional stage/successional stage) edge and total edge. Size of stands are related to expected wildlife diversity.

Southeastern Oregon has a variety of fish habitats which include major rivers, tributary streams, large and small reservoirs, lakes, and springs. These habitats are directly related to and highly dependent on the conditions of the surrounding rangeland watersheds. Satterlund (1975, p. 22) put it this way: "Rangelands may yield little water, but they are second only to cultivated lands as a source of water quality problems." It may be fairly stated, therefore, that man's agricultural activities in rangelands of southeastern Oregon have altered aquatic habitats more than any other land use.