Treesearch

Forage quality was assessed in pole and sapling ponderosa pine (Pinus ponderosa) stands growing at five stocking levels - 0, 5. 14, 23, and unthinned (which approximated 40 m2/ha basal area)-in the Black Hills of South Dakota. Crude protein, acid detergent fiber, acid detergent lignin, ash, calcium, and phosphorus were evaluated for cream peavine (Lathyrus ochroleucus), bearberry (Arctostaphylos uva-ursi), and timber oatgrass (Danthonia intermedia). Acid detergent fiber, acid detergent lignin, and ash showed some significant differences among growing stock levels for cream peavine growing...

Yields arrayed by site index and age have been tabulated for plantations of 500 trees per acre, with five thinning regimes, for Douglas-fir, grand fir, and western larch. Yields were also tabulated for naturally regenerated stands of the grand fir-cedar-hemlock ecosystem of the Inland Empire. All yields were estimated with the Prognosis Model for Stand Development, version 5.2, including the Regeneration Establishment Model.

This site, selected to be representative of high-mountain wilderness ecosystems, is being used to study the effects of air pollution and atmospheric deposition In alpine and subalpine, terrestrial and aquatic biotic communities. The research program includes (a) short-term experiments designed to quantify the response of system components hypothesized to be most sensitive to changes In ozone, 8, and N air pollution and deposition; (b) development of operationally oriented models capable of predicting system, species, and biogeochemical responses; and (c) long-term biogeochemically-oriented...

This report develops a standard way of measuring and evaluating riparian conditions. These methods will be helpful to those persons documenting, monitoring, predicting, or evaluating riparian, stream, or range conditions, and how this relates to their biotic resources, especially those conditions needed to relate to impacts from land uses.

Forest vegetation classified by habitat types and community types in Colorado are tabulated. Fifteen series and 161 habitat and community types are identified. However, the habitat and community types have been grouped into fewer categories, having similar characteristics or synonymous names. Included are the name, location, relative site, successional status, tree and principal undergrowth associates, and the authority.

Presents highlights of the forest resources of Idaho as of 1981. Describes the forest resources, their extent, condition, and location, and discusses levels of some nontimber use of forest lands. Includes statistical tables: area by land classes, ownership, growing-stock and sawtimber volumes, growth, mortality, roundwood products output, utilization, and residues.

Presents land area, timberland area, woodland area, timber inventory, and growth and mortality data for 12 counties in western Colorado. Information and statistical tables are based on Forest Survey data collected from 1981 through 1984 and cover State and private forest resources.

Presents highlights of the forest resources of Colorado as of 1983. Describes the forest resources, their extent, condition, and location. Includes statistical tables: area by land classes, ownership, growing-stock and sawtimber volumes, growth, mortality, roundwood products output, and utilization.

Fourth in a series of proceedings of symposia on wildland shrubs, this publication brings together current knowledge of interactions between plants and herbivores. Topics addressed by the 31 papers include plant chemistry, palatability, nutrition and physiology, herbivore foraging behavior, and plant response to browsing.

Includes more than 90 papers bringing together research accomplishments of the last 10 years including ongoing research on the ecology and management of pinyon-juniper ecosystems. Scientist and management points of view are presented.