Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network

Open Access. Powered by Scholars. Published by Universities.®

Brigham Young University

1984

Discipline
Keyword
Publication
Publication Type
File Type

Articles 1 - 30 of 353

Full-Text Articles in Entire DC Network

Application Of Combined Jointed Media And Discrete Slip Plane Characteristics To Subsidence Predictions, David W. Basinger Dec 1984

Application Of Combined Jointed Media And Discrete Slip Plane Characteristics To Subsidence Predictions, David W. Basinger

Theses and Dissertations

This thesis presents an application of a numerical formulation incorporating the effects of joints, cracks, and fractures to a soil subsidence predictions problem, and the extension of that formulation to combined discrete slip planes and jointed media continua formulations. The results obtained are compared to each other and to a physical centrifuge simulation performed previously on the same problem.


Soil Water And Temperature Response To Prescribed Burning, S. G. Whisenant, C. J. Scifres, D. N. Ueckert Oct 1984

Soil Water And Temperature Response To Prescribed Burning, S. G. Whisenant, C. J. Scifres, D. N. Ueckert

Great Basin Naturalist

Prescribed burning of Texas wintergrass (Stipa leucotricha Trin. & Rupr.) communities reduced soil water contents for two to six months, and additional reductions occurred when the subsequent crop of cool-season grasses and forbs began growth. These soil water reductions occurred despite reduced plant production following burning. Soil water reductions were greater at 15 to 45 cm depths than in the upper 15 cm and greater following spring burning. Soil temperatures were higher on burned plots for most of the first year following burning.


Habitat And Distribution Of Pygmy Rabbits (Sylvilagus Idahoensis) In Oregon, Nondor T. Weiss, B. J. Verts Oct 1984

Habitat And Distribution Of Pygmy Rabbits (Sylvilagus Idahoensis) In Oregon, Nondor T. Weiss, B. J. Verts

Great Basin Naturalist

An investigation to determine the location and extent of populations of pygmy rabbits (Sylvilagus idahoensis) in Oregon, and to describe several biotic and physical components within communities that include pygmy rabbits, was conducted from October 1981 to September 1983. Of 211 sites suspected of supporting the species based on interpretation of museum records, aerial photographs, soil maps, and interviews with biologists and area residents, 51 exhibited evidence of being inhabited when examined in summer 1982. Soil and vegetation components were sampled at 15 sites occupied by pygmy rabbits and 21 sites adjacent thereto. At inhabited sites, mean soil …


Utah Flora: Polygonaceae, Stanley L. Welsh Oct 1984

Utah Flora: Polygonaceae, Stanley L. Welsh

Great Basin Naturalist

The genera and species of Polygonaceae in Utah are revised. Descriptions and keys to taxa are included, along with habitat, elevation, and distributional data. Taxonomic problems are outlined and discussed. Described as new is Eriogonum brevicaule Nutt. var. promiscuum Welsh. New nomenclatural combinations include Eriogonum batemanii Jones var. eremicum (Reveal) Welsh and var. ostlundii (Jones) Welsh; E. brevicaule Nutt. var. desertorum (Maguire) Welsh, var. ephedroides (Reveal) Welsh, var. loganum (A. Nels.) Welsh, var. nanum (Reveal) Welsh, and var. viridulum (Reveal) Welsh; E. corymbosum Benth var. cronquistii (Reveal) Welsh, var. humivagans (Reveal) Welsh, var. smithii (Reveal) Welsh; E. lonchophyllum T. & …


Late Summer Changes In Mule Deer Diets With Increasing Use On Bitterbrush Rangeland, D. D. Austin, P. J. Urness, J. King Oct 1984

Late Summer Changes In Mule Deer Diets With Increasing Use On Bitterbrush Rangeland, D. D. Austin, P. J. Urness, J. King

Great Basin Naturalist

Late summer diet composition of mule deer was determined daily within a mountain browse enclosure dominated by antelope bitterbrush. Palatable forages of low abundance were rapidly depleted, and bitterbrush continually composed over 50% of the diet, even at utilization exceeding 350 deer-days/ha. The relationship of bitterbrush forage production and deer-days use is discussed.


Insect Damage, Cone Dimensions, And Seed Production In Crown Levels Of Ponderosa Pine, J. M. Schmid, J. C. Mitchell, K. D. Carlin, M. R. Wagner Oct 1984

Insect Damage, Cone Dimensions, And Seed Production In Crown Levels Of Ponderosa Pine, J. M. Schmid, J. C. Mitchell, K. D. Carlin, M. R. Wagner

Great Basin Naturalist

Insect damage to second-year cones was generally not significantly different between crown levels, but was significantly different among areas and among trees within areas for Conophthorus, Megastigmus, and Cydia. Both cone length and width were not significantly different between lower and middle crown, but cone length was significantly greater in the upper crown. Seeds per cone ranged from 34 to 66, but the percent of sound seed per cone varied significantly according to the amount of insect damage.


Environmental Site Characteristics And Incidence Of Chokecherry Black Knot In Utah, Sarah Ann Stewart, D. J. Weber Oct 1984

Environmental Site Characteristics And Incidence Of Chokecherry Black Knot In Utah, Sarah Ann Stewart, D. J. Weber

Great Basin Naturalist

Black knot disease of chokecherries, induced by Dibotryon morbosum (Schw.) Th. & Syd., is widely distributed in Utah. The incidence of black knot was measured by determining the ratio of total black knot gall length to total stem length of plants and then expressing that value as a percentage of diseased stems in the sample plot. The environmental site factors measured were elevation, exposure, slope, soil pH, soil depth, distance to surface water, plant moisture stress, and associated vegetation. Numerical values were determined for each of these variables at each of 18 randomly located plots. Correlation coefficients for plant moisture …


Plant Nutrient Levels On Two Summer Ranges In The River Of No Return Wilderness Area, Idaho, Charles L. Elliott, Jerran T. Flinders Oct 1984

Plant Nutrient Levels On Two Summer Ranges In The River Of No Return Wilderness Area, Idaho, Charles L. Elliott, Jerran T. Flinders

Great Basin Naturalist

Monthly percent nutrient and moisture levels of plant species on two summer ranges in the River of No Return Wilderness Area of Idaho were determined. Festuca idahoensis exhibited the highest average crude protein content of graminoids on both study areas. Achillea millefolium and Balsamorhiza saggittata at Rush Point and Trifolium spp. and Achillea millefolium at Cold Meadows possessed the highest mean crude protein content of the forbs examined. Grasses exhibited greater average seasonal levels of crude fiber, and forbs generally contained significantly larger levels of Ca, P, and moisture.


Producer-Consumer Biomass In Montane Forests On The Arizona Mogollon Plateau, Warren P. Clary, Peter F. Ffolliott, Frederic R. Larson Oct 1984

Producer-Consumer Biomass In Montane Forests On The Arizona Mogollon Plateau, Warren P. Clary, Peter F. Ffolliott, Frederic R. Larson

Great Basin Naturalist

A substantially complete compilation of producer-consumer biomass was achieved for two montane forest reference stands on the Arizona Mogollon Plateau. This compilation, containing published and previously unpublished data, shows these ponderosa-pine-dominated stands to be near the lower end of the biomass range of commercial forest types. The two stands averaged approximately 75 metric tons/ha of plant biomass. Consumers made up less than 0.01 percent of the forest biomass. About 9/10 of the measured consumer biomass consisted of domestic and native ruminants.


Birds Of The Desert Region Of Uintah County, Utah, A. Gaylon Cook Oct 1984

Birds Of The Desert Region Of Uintah County, Utah, A. Gaylon Cook

Great Basin Naturalist

The Common Loon, White Pelican, Double-crested Cormorant, recurvirostrids, and most grebes, waterfowl, gulls, and terns have become more abundant in Uintah County, Utah, since 1937 (Twomey 1942) due to the establishment of Pelican Lake and adjacent water bodies and the ponds and marshes at Ouray National Wildlife Refuge and Pariette Wetlands Wildlife Management Area. The incidence of herons, egrets, thrushes, nuthatches, and icterids has generally remained about the same since 1937. Diurnal raptors have largely declined in abundance in the desert region of Uintah County since Twomey's (1942) study. Plovers, sandpipers, phalaropes, and the White-faced Ibis were generally less common …


Role Of Livestock And Black-Tailed Jackrabbits In Changing Abundance Of Kochia Americana, William R. Clark, Frederic H. Wagner Oct 1984

Role Of Livestock And Black-Tailed Jackrabbits In Changing Abundance Of Kochia Americana, William R. Clark, Frederic H. Wagner

Great Basin Naturalist

Historical accounts and matched photographs indicate sharp decline of once-abundant Kochia americana in eastern Great Basin vegetation since the early 1900s, most of the decline by the late 1950s. Exclosure data show further decline from 1957 to 1973, then some increase between 1970 and 1973 and 1976 and 1981. Utah sheep numbers, at maximum from 1925 to 1940 and declining steadily to the 1970s, may have induced the long-term changes. Black-tailed jackrabbits (Lepus californicus), could not have induced vegetation decline, but could have added to livestock pressure and abetted the trend. In 1972, rabbits near a cyclic high …


Additions To A Bibliography Of Colorado Vegetation Description, William L. Baker Oct 1984

Additions To A Bibliography Of Colorado Vegetation Description, William L. Baker

Great Basin Naturalist

A list of 80 references to Colorado vegetation description is presented, along with county and subject indexes to the list. This list expands an earlier list (663) to include literature through 1983.


A Preliminary Classification Of The Natural Vegetation Of Colorado, William L. Baker Oct 1984

A Preliminary Classification Of The Natural Vegetation Of Colorado, William L. Baker

Great Basin Naturalist

A classification of the natural vegetation of Colorado is presented. This classification, which uses the Plant Association as the basic unit, was developed by sorting data in the scientific literature, supplemented by field research. The classification uses a standardized nomenclature. Citations are given for the literature from Colorado and adjoining states for each Association. The classification includes a total of 403 Plant Associations, with 28 Angiosperm Forests/Woodlands, 2 Mixed Angiosperm–Gymnosperm Forests/Woodlands, 114 Gymnosperm Forests/Woodlands, 100 Shrub Associations, 74 Grassland Associations, 38 Graminoid Associations, and 47 Herb Associations.


Full Issue, Vol. 44 No. 4 Oct 1984

Full Issue, Vol. 44 No. 4

Great Basin Naturalist

No abstract provided.


Front Matter, Vol. 44 No. 4 Oct 1984

Front Matter, Vol. 44 No. 4

Great Basin Naturalist

No abstract provided.


Index [And Table Of Contents] To Volume 44 Oct 1984

Index [And Table Of Contents] To Volume 44

Great Basin Naturalist

No abstract provided.


End Matter, Vol. 44 No. 4 Oct 1984

End Matter, Vol. 44 No. 4

Great Basin Naturalist

No abstract provided.


Front Matter, Committee On East Asian Libraries Oct 1984

Front Matter, Committee On East Asian Libraries

Journal of East Asian Libraries

No abstract provided.


The Rare Book Collection On Chinese Medicine In The Gest Oriental Library At Princeton University, Charmian Cheng Oct 1984

The Rare Book Collection On Chinese Medicine In The Gest Oriental Library At Princeton University, Charmian Cheng

Journal of East Asian Libraries

No abstract provided.


The Persisting Idea Of American Treasure Hunting, Ronald W. Walker Oct 1984

The Persisting Idea Of American Treasure Hunting, Ronald W. Walker

BYU Studies Quarterly

No abstract provided.


Joseph Smith: The Palmyra Seer, Ronald W. Walker Oct 1984

Joseph Smith: The Palmyra Seer, Ronald W. Walker

BYU Studies Quarterly

No abstract provided.


What's New In Technical Processing, Thomas H. Lee, Harriet Zais-Gabbert, Iping King Wei, Beatrice Chang Ohta, Karen T. Wei Oct 1984

What's New In Technical Processing, Thomas H. Lee, Harriet Zais-Gabbert, Iping King Wei, Beatrice Chang Ohta, Karen T. Wei

Journal of East Asian Libraries

No abstract provided.


Chinese Works On Materia Medica In The Library Of Congress, Mi Chu Wiens Oct 1984

Chinese Works On Materia Medica In The Library Of Congress, Mi Chu Wiens

Journal of East Asian Libraries

No abstract provided.


Editor's Introduction, Byu Studies Oct 1984

Editor's Introduction, Byu Studies

BYU Studies Quarterly

No abstract provided.


Introductory Pages, Byu Studies Oct 1984

Introductory Pages, Byu Studies

BYU Studies Quarterly

No abstract provided.


New Documents And Mormon Beginnings, Dean C. Jessee Oct 1984

New Documents And Mormon Beginnings, Dean C. Jessee

BYU Studies Quarterly

No abstract provided.


End Matter, Byu Studies Oct 1984

End Matter, Byu Studies

BYU Studies Quarterly

No abstract provided.


Money-Digging Folklore And The Beginnings Of Mormonism: An Interpretive Suggestion, Marvin S. Hill Oct 1984

Money-Digging Folklore And The Beginnings Of Mormonism: An Interpretive Suggestion, Marvin S. Hill

BYU Studies Quarterly

No abstract provided.


The Mature Joseph Smith And Treasure Searching, Richard Lloyd Anderson Oct 1984

The Mature Joseph Smith And Treasure Searching, Richard Lloyd Anderson

BYU Studies Quarterly

No abstract provided.


Full Issue, Byu Studies Oct 1984

Full Issue, Byu Studies

BYU Studies Quarterly

No abstract provided.