Treesearch

From data for 114 thinning and fertilizing trials in forests of southwestern Oregon and northern California with 5 or more years of observation, we produced equations to estimate gross cubic volume growth of 10- to 70-year-old Douglas-fir stands. These equations use stand escriptors (breast-height age, site index, and relative density) and treatment descriptors to estimate annual gross volume growth during a 10-year period for untreated and treated (fertilized or thinned, or both) stands. These predictions (SWOR) were compared with other growth predictions including DFSIM, a simulation...

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.

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.

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.

The forest products industry is one of Tennessee's basic industries; in 1980, for example, it accounted for about 1 of every 12 basic jobs. Furthermore, Tennessee was one of the majority of Southern States in which the forest products industry improved its competitive position during the 1970's. In 1977, productivity growth of the paper and allied products segment far exceeded the average for the forest products industry as well as the average for all industries.

A list of publications resulting from research at th H.J. Andrews Experimental Forest, Willamette National Forest, Oregon, from 1948 to 1986 is presented. Nearly 600 publications are listed, including papers, theses, and abstracts. An index is provided that cross-references the listings under appropriate keywords.

PRUNE-SIM is a spreadsheet template (program) that allows users to simulate a financial analysis of pruning coast Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii). The program estimates the increase in product value resulting from pruning the butt 17-foot log. Product recovery information is based on actual mill experience with pruned and unpruned logs for both sawn and peeled products. Users must supply tree descriptions from sources of growth and yield information and product prices. The program calculates the difference in value for trees and stands with and without...

A timber resource inventory of the Porcupine inventory unit, Alaska, was conducted in 1977 and 1978. Statistics on forest area, timber volumes, and annual growth and mortality from this inventory are presented. Timberland area is estimated at 1,453 thousand acres, and net growing stock volume, mostly softwood, is 530,505 thousand cubic feet. Net annual growth of growing stock is estimated at -3,415 thousand cubic feet and annual mortality at 5,841 thousand cubic feet.

The invertebrate communities ofeight Oregon streams were sampled seasonally from 1974 to 1976. Benthic, drift, and two types of aerial-trap samples were collected. Occurrence and percentage composition are summarized by sample type, season, and geographic area (coastal, Cascade, central, and eastern Oregon). Within 276 families, 426 taxa were identified; the 20 families most prevalent within each sample type accounted for the majority of organisms collected (77.8-91.8 percent). In most areas and seasons, Diptera and Ephemeroptera together comprised over half of the invertebrates collected.

This illustrated key for identifying spiders inhabiting true fir and Douglas-fir is based on extensive collections from throughout the three North American Pacific Coast States. Details of the age classes present at budburst and the season in which to expect adults are presented for all species. This paper is written for people unfamiliar as well as familiar with spider taxonomy; a glossary of all technical terms is included. References to pertinent technical literature are also included.