Treesearch

Provides current information on lumber and plywood production and prices; employment in the forest industries: international trade in logs, lumber, and plywood: volume and average prices of stumpage sold by public agencies: and other related items.

A bark-scoring trial was carried out on 379 of 1,234 grafts in five western Oregon seed orchards. Ages of grafted trees in 1983 ranged from 5 to 16 years. Scoring was done in April, June, or August of the first and third years of the 4-year test. Cuts across the defective interface of the union were made every 3.1 to 4.3 cm with a small, gas-powered chain saw. Many trees showed improved vegetative vigor after treatment. Annual mortality in the five orchards averaged just 1.6 percent when all defective grafts were treated. Diameter growth of rootstocks was least in incompatible grafts and...

Mountain goats in southeastern Alaska occupy habitats providing abundant areas of highquality forage during summer but only limited feeding areas during winter because of deep snow. Winter is a period of severe utritional deprivation, and goats converge into areas with available forage, often within old-growth forest where relatively low snow depths and litterfall enhance food availability. Goats are further restricted in their habitat use to sites within and near steep and rugged terrain, which provides escape areas from predation by wolves. Because goat winter habitat is limited, even...

TREEVAL is a microcomputer model that calculates tree or stand values and volumes based on product prices, manufacturing costs, and predicted product recovery. It was designed as an aid in evaluating management regimes. TREEVAL calculates values in either of two ways, one based on optimized tree bucking using dynamic programming and one simulating the results of user-specified bucking.

The USDA Forest Service national range program is currently evaluating its information needs at the national level A Range Measurement Task Group of Agency personnel was assembled in January 1988 to evaluate the information needs and recommend appropriate measures and reports. This document is the final recommendation of the task group. The recommendation includes measuring and reporting five broad areas of range management: range vegetation management, riparian vegetation management, grazing management, noxious weed management, and wild horse and burro management. Each area is directly...

The proceedings contains 13 papers presented at the workshop. The papers reflect work done in Finland, Sweden, Norway, Canada, and the People's Republic of China.

Volumes and average values of log exports by port have been compiled by quarter for 1987. The tables show the four Northwest customs districts by ports, species, and destinations. These data were received from the U.S. Department of Commerce too late to be published in the 1987 quarterly reports, "Production, Prices, Employment, and Trade in Northwest Forest Industries

A technique is described for sampling spruce budworm larvae after bud flush by nondestructively beating branches in the lower crown. Sample data were collected from 32 plots representing a wide range of budworm densities. Statistical analyses indicated that larvae were less aggregated in the lower crown than at the same density in the middle crown. In an independent sample of 12 plots, estimates of larval density in the middle crown were 2.5 times higher than but strongly correlated with estimates of density in the lower crown. Sampling in the lower crown is quick and efficient and...

Basal area and volume production in loblolly pine spacing trials in Hawaii were nearly double the average production in research plantings in the Southeastern United States. The higher productivity in Hawaii was associated, to some extent, with site index and more rapid growth of individual trees. Competition-related mortality, however, was considerably lower in Hawaii, despite the fact that trees were larger. Consequently, limiting density and mortality threshold boundary lines were much higher. Such differences in stockability (or maximum mean tree size-stand density relationships)...

The outlook for shipments and prices of export logs from Alaska differs significantly by grade (quality class). For the majority lying in the middle of the value range, the trend of prices is projected to increase $200 per thousand board feet, or about 55 percent, by 2000. Shipments are expected to rise about 30 percent by 1995 and then subside about 10 percent. These conclusions are based on a country-by-country assessment of consuming and competing supply regions around the Pacific Rim, and assume currency exchange rates remain at 1987 levels and no inflation occurs.