Rangeland Ecology & Management
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Displaying 51 - 100 of 237 results
- Library Collection RecordThe impact of grazing animals and plant protection on shrub seedling establishment was studied in 2 separate experiments. A total of 3,665 seedlings were monitored for survival during a sheep grazing…Publication Date 1992-05-01
- colonizing ability
- biological control
- site factors
- Agropyron desertorum
- brush control
- mortality
- seedlings
- pastures
- Artemisia tridentata
- sheep
- cattle
- Utah
- grazing
- Library Collection RecordA study determined sage grouse (Centrocercus urophasianus) preference for 3 subspecies and 9 accessions of big sagebrush (Artemisia tridentata Nutt.). The subspecies were mountain big sagebrush (A.t…Publication Date 1991-09-01
- geographical races
- Phasianidae
- Centrocercus urophasianus
- subspecies feeding preferences
- accession
- biting rates
- leaves
- genotype
- Artemisia tridentata
- Utah
- feeding preferences
- Library Collection RecordBarbey larkspur (Delphinium barbeyi L. Huth) is a palatable poisonous plant that causes a large number of cattle deaths on mountain rangelands. The objective of the study was to determine whether or…Publication Date 1990-03-01
- behavior modification
- lithium
- chlorides
- forage conditioning
- grazing trials
- Delphinium barbeyi
- heifers
- diets
- grazing behavior
- cattle
- Utah
- feeding preferences
- poisonous plants
- Library Collection RecordDietary composition and quality, activity budgets, and foraging behavior of tame mule deer (Odocoileus hemionus hemionus) were monitored in winter to ascertain the effects of prior summer use of…Publication Date 1990-05-01
- overwintering
- snow
- foraging
- Odocoileus hemionus
- Odocoileus
- diet studies
- goats
- wildlife management
- botanical composition
- Utah
- browsing
- Library Collection RecordSmall-plot trials of effective herbicides for manual woody-weed treatments should be validated on large tracts where rapidity, thoroughness, and efficiency of application are integral to operational-…Publication Date 1990-01-01
- Pinus monophylla
- coverage
- Juniperus osteosperma
- manual weed control
- timing
- placement
- pesticide application
- tebuthiuron
- brush control
- range management
- Utah
- Library Collection RecordLittle has been done to evaluate the mid-winter crude protein, phosphorus, and in vitro digestibility of subspecies and accessions of rubber rabbitbrush (Chrysothamnus nauseosus ssp.) For those few…Publication Date 1990-03-01
- geographical races
- variation
- Chrysothamnus nauseosus
- winter
- phosphorus
- crude protein
- California
- in vitro digestibility
- Nevada
- nutritive value
- Utah
- Arizona
- forage
- Library Collection RecordGlobemallows (Sphaeralcea spp.) have potential in rangeland seedings. Thirty-seven accessions of globemallow were grown at 2 sites in northern Utah and southern Idaho to quantify their agronomic…Publication Date 1990-09-01
- sphaeralcea munroana
- Sphaeralcea
- sphaeralcea grossulariifolia
- sphaeralcea parvifolia
- Sphaeralcea coccinea
- mixed pastures
- Medicago sativa
- agronomic traits
- sown grasslands
- arid zones
- genotype
- Agropyron desertorum
- genetic variation
- Agropyron cristatum
- mortality
- seeds
- pastures
- Idaho
- growth rate
- crop yield
- Utah
- forage
- Library Collection RecordBasin big sagebrush (Artemisia tridentata Nutt ssp tridentata Beetle) often invades rangelands seeded to introduced grass species. Livestock grazing may enhance the invasion but the effects of…Publication Date 1990-03-01
- short-duration grazing
- size
- Agropyron desertorum
- population dynamics
- mortality
- pastures
- grazing intensity
- Artemisia tridentata
- plant density
- Utah
- grazing
- Library Collection RecordFoliar sprays of 2,4-D [(2,4-dichlorophenoxy)acetic acid]), picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid), dicamba (3,6-dichloro-2-methoxy benzoic acid), or clopyralid (3,6-dichloro-2-…Publication Date 1988-11-01
- Chrysothamnus
- Weeds
- evaluation
- herbicides
- weed control
- species
- range management
- rangelands
- Utah
- Library Collection RecordThe growth and annual replacement of crested wheatgrass (Agropyron desertorum (Fisch. ex Link) Schult.) tillers are affected by resource availability. Fertilization and grazing affect the resources…Publication Date 1989-03-01
- Agropyron desertorum
- tillering
- Utah
- Library Collection RecordDyers woad (Isatis tinctoria L.) is an introduced cruciferous forb that is rapidly expanding on intermountain rangelands and is apparently reducing production and regeneration of more desirable…Publication Date 1989-01-01
- Isatis tinctoria
- cultural control
- biological control
- weed control
- mortality
- cutting
- sheep
- Utah
- grazing
- Library Collection RecordReplicated populations of 5 shrub species were monitored over a 3-year period to assess community responses to intensive browsing by Spanish-type goats. Response variables included stem density, stem…Publication Date 1989-09-01
- productivity
- goats
- botanical composition
- Utah
- Library Collection RecordTall larkspur (Delphinium barbeyi) is a major cause of livestock death on mountain ranges. The influence of plant phenology, grazing site, and rumen fill on tall larkspur consumption was evaluated…Publication Date 1988-11-01
- consumption
- mountains
- mountain areas
- toxicity
- highlands
- site factors
- Delphinium barbeyi
- palatability
- rumen contents
- diet studies
- cattle
- rangelands
- Utah
- poisonous plants
- Library Collection RecordThe allometric relationship between plant volume and phytomass of crested wheatgrass was studied for the 1981, 1983, and 1984 growing seasons in west-central Utah. Basal diameters, canopy diameters,…Publication Date 1988-09-01
- models
- biomass determination
- volume determination
- estimates
- allometry
- nonlinear regression
- Agropyron desertorum
- prediction
- productivity
- diameter
- range management
- Utah
- canopy
- plant height
- Library Collection RecordEphedra viridis and Ephedra nevadensis were gavaged at high doses to pregnant livestock to determine whether there existed any maternal or embryo/fetal toxicity. E. viridis was tested in both sheep…Publication Date 1989-01-01
- fetus
- human health and safety
- embryo (animal)
- ephedra viridis
- symptoms
- Ephedra
- cows
- toxicity
- sheep
- Utah
- poisonous plants
- Library Collection RecordThis study considered seedling establishment characteristics, nitrogen fixation capability, nutritive value, and clustering relationships among 11 putative ecotypes of sweetvetch (Hedysarum boreale…Publication Date 1989-11-01
- Hedysarum
- provenance trials
- crop establishment
- cluster analysis
- nitrogen fixation
- ecotypes
- genetic variation
- seedlings
- nutritive value
- Utah
- forage
- Library Collection RecordVegetation and soils were evaluated on 5 different-aged, mechanically treated and seeded pinyon-juniper sites and compared to adjacent untreated areas. Plant cover was significantly changed after…Publication Date 1989-03-01
- botanical composition
- Pinus
- Juniperus
- removal
- Utah
- Library Collection RecordThe predation by selected arthropod predators on immature and adult black grass bugs (BGB), Labops hesperius and Irbisia brachycera, on Utah ranges was investigated. Adult Nabis alternatus was found…Publication Date 1988-03-01
- insect control
- biological control
- Hemiptera
- arthropods
- Labops hesperius
- predators of insect pests
- irbisia brachycera
- Agropyron
- predators
- rangelands
- Utah
- Library Collection RecordIngestion of tall larkspur (Delphinium barbeyi L. Huth) is a major cause of cattle death on ranges where the plant occurs. The amount and timing of tall larkspur ingestion by grazing cattle was…Publication Date 1988-03-01
- alkaloids
- Delphinium barbeyi
- ingestion toxicity
- mountain grasslands
- grazing behavior
- cattle
- phenology
- rangelands
- Utah
- poisonous plants
- Library Collection RecordUnderstanding the conditions in which livestock consume poisonous plants is necessary to develop management strategies to reduce losses. Three 10-day grazing trials were conducted to observe…Publication Date 1987-07-01
- premature birth
- prevention
- maturity
- pods
- developmental stages
- Oxytropis
- weed palatability
- flowers
- Oxytropis sericea
- grazing experiments
- stocking rate
- Hereford
- steers
- Utah
- feeding preferences
- Library Collection RecordThe feasibility of using esophageal extrusa to monitor dietary tannin levels was studied using 4 shrub species (Purshia tridentata, Quercus gambelii, Cercocarpus montanus and Acer grandidentatum).…Publication Date 1987-09-01
- Acer saccharum subsp. grandidentatum
- mastication
- Quercus gambelii
- saliva
- phenolic compounds
- Purshia tridentata
- browse plants
- esophagus
- tannins
- crude protein
- cattle
- in vitro digestibility
- Utah
- Cercocarpus montanus
- Library Collection RecordAn approach was developed for estimating the economic optimum rate of initial overstory kill for increasing seasonal forage availability. The model was formulated using: (1) a biological production…Publication Date 1988-03-01
- scrub control
- overstory control
- understory release
- econometric models
- optimization
- Agropyron desertorum
- Agropyron cristatum
- crop production
- Artemisia tridentata
- range management
- Utah
- forage
- Library Collection RecordFour communities or sites dominated by blackbrush (Coleogyne ramosissima Torr.) were studied in the Kaiparowits Basin of southern Utah and northern Arizona. One site has been heavily grazed yearlong…Publication Date 1987-09-01
- Coleogyne ramosissima
- ground cover
- vegetation types
- plant communities
- Utah
- livestock
- grazing
- Arizona
- Library Collection RecordUtilization of a crested wheatgrass pasture was studied at constant stocking rate (3 cattle/ha) in pastures of 1, 2, 4, and 8 ha, with herd sizes ranging from 3-24 head. Pasture utilization on a…Publication Date 1988-01-01
- livestock numbers
- Agropyron desertorum
- pastures
- grazing behavior
- cattle
- Utah
- feeding preferences
- Library Collection RecordAnimal performance and nutrition under short duration grazing (SDG) and season-long grazing (SLG) were compared on spring-grazed crested wheatgrass [Agropyron desertorum (Fisch.) Schult. and A.…Publication Date 1988-05-01
- nutrient requirements
- forage evaluation
- animal production
- controlled grazing
- browse plants
- Agropyron desertorum
- liveweight gain
- Agropyron cristatum
- heifers
- Utah
- grazing
- feed intake
- Library Collection RecordPlanting palatable shrubs and legumes into an established stand of crested wheatgrass (Agropyron desertorum and A. cristatum) could increase forage yield and nutritional quality. Preferential grazing…Publication Date 1987-11-01
- transplanting
- interplanting
- planting
- Bassia prostrata
- Medicago sativa
- Agropyron desertorum
- Atriplex canescens
- Agropyron cristatum
- growth
- cutting
- Artemisia tridentata
- crop yield
- plant competition
- rangelands
- Utah
- Library Collection RecordA fence line contrast was provided by a deer fence that bisected a mountain big sagebrush (Artemisia tridentata ssp. vaseyana) community. The sagebrush community was located on an exposed, west-…Publication Date 1988-03-01
- dieback
- plant community analysis
- ecological succession
- mortality
- mountain grasslands
- Artemisia tridentata
- Odocoileus hemionus
- browsing damage
- Utah
- Library Collection RecordA study was conducted in Rich County, Utah, to determine the relationship between land ownership and range condition. Analysis of variance and paired-plot t-tests were used to compare range condition…Publication Date 1987-07-01
- analysis of variance
- expenditures
- public ownership
- correlation
- environmental assessment
- private ownership
- land ownership
- sampling
- rangelands
- Utah
- grazing
- Library Collection RecordSoil textural relationships were used on 3 soil series on both plowed and native rangeland to predict Green and Ampt infiltration equation parameters. Infiltration rates predicted from the Green and…Publication Date 1988-03-01
- soil organic matter
- physicochemical properties
- rangeland soils
- methodology
- soil water content
- Utah
- infiltration
- bulk density
- soil texture
- Library Collection RecordThe successful establishment of perennial grass seedlings on Artemisia rangelands may depend on germination in the early spring at cold seedbed conditions. To ascertain the feasibility of selecting…Publication Date 1986-07-01
- Elytrigia repens
- cold tolerance
- Elytrigia intermedia subsp. intermedia
- hybrids
- lines
- Agropyron desertorum
- seed germination
- Utah
- Library Collection RecordBecause of restrictions imposed by crossing barriers, crested wheatgrass breeders have usually limited themselves to selection and hybridization within ploidy levels i.e., diploid (2n=14), tetraploid…Publication Date 1986-05-01
- seed production
- interspecific hybridization
- agronomic traits
- plant breeding
- Agropyron desertorum
- genetic variation
- tetraploidy
- Agropyron cristatum
- semiarid zones
- rangelands
- Utah
- Library Collection RecordGrazing sheep on improved pastures during winter offers an economically attractive alternative to supplementation in sage-brush steppe ecosystems. We studied diet selection and nutrition of sheep…Publication Date 1986-11-01
- Agropyron desertorum
- steppes
- grazing experiments
- pastures
- winter
- woody plants
- animal nutrition
- digestibility
- sheep
- range management
- rangelands
- Utah
- grazing
- feed intake
- feeding preferences
- Library Collection RecordLight and temperature dependencies for net photosynthesis and stomatal conductance were generally very similar between foliage on crested wheatgrass (Agropyron desertorum (Fisch. ex Link) Schult.)…Publication Date 1986-09-01
- characteristics
- stomatal movement
- plant physiology
- Pseudoroegneria spicata
- light intensity
- Agropyron desertorum
- photosynthesis
- gas exchange
- temperature
- phenology
- rangelands
- Utah
- Library Collection RecordThe perpetuation of legumes in rangeland pasture plantings is dependent upon natural seeding and nodulation of the seedlings by naturalized soil rhizobia. This study determined the distribution and…Publication Date 1987-05-01
- rhizosphere
- Sinorhizobium meliloti
- nitrogen fixation
- spread
- rangeland soils
- Medicago sativa
- symbiosis
- populations
- Idaho
- Utah
- Library Collection RecordUtilization studies conducted on a high mountain range determined the quantity and timing of white locoweed (Oxytropis sericea Nutt.) consumption by cattle. Paired plots (one caged and one grazed)…Publication Date 1986-07-01
- toxins
- utilization
- consumption
- mountains
- Oxytropis
- grazing behavior
- cattle
- rangelands
- Utah
- forage
- Library Collection RecordWe observed the effects of accessions of big sagebrush (Artemisia tridentata) on big sagebrush utilization by wintering domestic sheep. The sheep had continuous access to high quality alfalfa hay and…Publication Date 1987-03-01
- genotype
- winter
- Artemisia tridentata
- sheep
- grazing behavior
- Utah
- grazing
- feeding preferences
- Library Collection RecordCanopy cover of vegetation dominated by Gambel oak was determined in 1983 in adjacent canyons characterized by different grazing histories. Results were compared with data collected in 1935, and the…Publication Date 1986-11-01
- brushwood and scrub
- mountains
- mountain areas
- highlands
- ecological succession
- botanical composition
- Utah
- livestock
- zero grazing
- Library Collection RecordSome high-elevation summer ranges in southwestern Utah are characterized by a dominance of grass and low-value forbs. A reference area of forb dominance provides a striking contrast to these grass…Publication Date 1986-09-01
- long term experiments
- regenerative ability
- vegetation
- mountain grasslands
- sheep
- Utah
- grazing
- Library Collection RecordLegumes are beneficial in providing high quality forage and enhancing fertility levels in the soil by biological nitrogen fixation. Nonperennial Medicago species have a world-wide distribution and…Publication Date 1986-01-01
- resowing
- Medicago
- legumes
- pastures
- establishment
- range management
- Utah
- Library Collection RecordGenotypic and phenotypic variations are characteristic among big sagebrush (Artemisia tridentata) plants. One obvious expression is the variability of big sagebrush plant stature along soil-water…Publication Date 1986-03-01
- ploidy
- gradients
- size
- genotype-environment interaction
- phenotype
- genotype
- genetic variation
- Wyoming
- Artemisia tridentata
- rangelands
- Utah
- plant height
- soil water
- Library Collection RecordSplit enclosures, half grazed and half ungrazed by cattle in summer, were compared for mule deer habitat use in late summer using tame deer. Diet composition, dietary nutrition, and area selected for…Publication Date 1986-01-01
- mountains
- Odocoileus
- diet studies
- grazing behavior
- cattle
- range management
- rangelands
- Utah
- grazing
- Library Collection RecordGrazing trials were conducted on high elevation summer range in southwestern Utah, with cattle and sheep stocked separately and together in .4-ha paddocks. Vegetation measurements were taken before…Publication Date 1985-07-01
- symphoricarpos oreophilus
- Symphoricarpos
- foraging
- highlands
- grazing intensity
- sheep
- cattle
- rangelands
- Utah
- Library Collection RecordMost studies of the impacts of fire in sagebrush-grass vegetation in the Great basin have involved recovery on sites seriously depleted of native perennial bunchgrasses. The usual recommendation is…Publication Date 1985-03-01
- vegetation management
- fires
- fire effects
- Artemisia tridentata
- Utah
- Library Collection RecordPrecise and accurate plant weight data are important to range managers, but difficult and expensive to obtain. Indirect and nondestructive estimates are especially desirable where vegetation is…Publication Date 1986-03-01
- indirect methods
- nondestructive methods
- biomass determination
- browse plants
- Krascheninnikovia lanata
- weight
- range management
- rangelands
- Utah
- Library Collection RecordEight general study sites were examined in the blackbrush (Coleogyne ramosissima) zone of southwestern Utah in order to assess the impact of burning. All sites had been burned. Age since burning…Publication Date 1985-11-01
- Coleogyne ramosissima
- deserts
- vegetation types
- dominant species
- plant ecology
- ecological succession
- fires
- fire effects
- prescribed burning
- plant communities
- range management
- Utah
- Library Collection RecordLarger ratios of males to females were found among fawns from herd units where forage production on the summer ranges was low and the forage base was dominated by browse. Summer ranges where forage…Publication Date 1984-01-01
- Utah
- Library Collection RecordTrue mountain mahogany (Cercocarpus montanus Raf.) and its habitats were studied in the canyons and foothills of the Wasatch Mountains of Central Utah. Twenty populations were selected and sampled…Publication Date 1984-07-01
- habitats
- ecological succession
- Utah
- Cercocarpus montanus
- Library Collection RecordThe herbicide tebuthiuron was applied aerially in replicated parallel strips at rates of 0, 1.3, 2.0, and 2.7 kg/ha a.i. (active ingredient) in 40% pellets on a Utah juniper stand, and at rates of 0…Publication Date 1985-01-01
- Juniperus osteosperma
- tebuthiuron
- Artemisia tridentata
- Utah
- Library Collection RecordSmall mammal populations were sampled annually over 4 years in native plant communities and improved rangeland types. All species of rodents were relatively less abundant where western wheatgrass was…Publication Date 1984-07-01
- rodents
- vegetation
- wildlife management
- rangelands
- Utah
- Library Collection RecordThis study was conducted to examine both spatial and temporal variability of infiltration rates on a rangeland site in west-central Utah. The experiment utilized a grid 20 m long and 18 m wide in…Publication Date 1984-09-01
- experimental design
- seasonal variation
- rangelands
- Utah
- infiltration
- soil water