Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 101 - 150 of 325 results
- Library Collection RecordGlobemallows (Sphaeralcea spp.) are well adapted to semiarid and arid environments. They are potentially useful as the forb component of seeding mixtures for rangeland improvement in the western…Publication Date 1993-03-01
- Sphaeralcea
- Medicago sativa
- arid lands
- Agropyron desertorum
- Agropyron cristatum
- species differences
- Idaho
- sheep
- grazing behavior
- pasture plants
- forage
- feeding preferences
- Library Collection RecordPaper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. Traditionally, effects of plant toxins on livestock have been measured…Publication Date 1992-01-01
- neurotoxins
- toxicology
- taste
- neurobehaioral toxicology
- respondent behahvior
- operant behavior
- taste aversion
- palatability
- animal behavior
- feeding behavior
- sheep
- cattle
- poisonous plants
- Library Collection RecordSeasonal grazing trials, conducted over 3 years at the Hopland Field Station in Mendocino County, Calif., tested the effects of 2 seasonal grazing strategies on within- and between-year production…Publication Date 1992-01-01
- Quercus douglasii
- annual grasslands
- grazing trials
- savannas
- selective grazing
- California
- sheep
- seasonal variation
- botanical composition
- grazing
- Library Collection RecordEfficient use of roughages is important for calf management in the Boran pastoral system. Using local legumes as protein supplements may improve fiber utilization and thus be an appropriate…Publication Date 1992-05-01
- Acacia tortilis
- Vigna unguiculata
- nitrogen retention
- Acacia
- Medicago sativa
- pastoralism
- Ethiopia
- browse plants
- liveweight gain
- calves
- dry seasons
- digestibility
- growth rate
- diets
- sheep
- protein supplements
- nutritive value
- Library Collection RecordThe accuracy of microhistological techniques for analysis of herbivore diets was evaluated with cattle, sheep, and Angora goats fed grass, forb, and shrub mixtures of known botanical compositions.…Publication Date 1992-03-01
- feces analysis
- assessment
- feces composition
- shrubs
- diets
- sheep
- goats
- cattle
- botanical composition
- grasses
- New Mexico
- forage
- feeding preferences
- Library Collection RecordAddiction is commonly cited as a clinical sign of locoweed (Astragalus spp. and Oxytropis spp.) poisoning. In a previous study, ewes progressively poisoned on locoweed ("locoed") in…Publication Date 1991-05-01
- addiction
- ewes
- Oxytropis
- Astragalus
- biting rates
- poisoning
- poisonous weeds
- sheep
- grazing behavior
- Utah
- feeding preferences
- Library Collection RecordPaper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. Livestock poisoning by plants is one of the serious causes of economic…Publication Date 1992-01-01
- livestock and meat industry
- losses
- economic impact
- toxicity
- Western United States
- sheep
- cattle
- forage
- poisonous plants
- 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 RecordThis paper discusses the criteria needed for quantitative evidence of overgrazing and outlines some of the main pasture and external factors that promote overgrazing by herbivores. Overgrazing is…Publication Date 1991-09-01
- wool production
- econometric models
- animal production
- economic analysis
- stocking rate
- pastures
- sheep
- overgrazing
- cattle
- rangelands
- Library Collection RecordSheep are more resistent to larkspur poisoning than cattle. Grazing larkspur with sheep before cattle turn-in may reduce the threat of cattle poisoning. Two 2.1-ha pastures were established in Upper…Publication Date 1992-03-01
- loss prevention
- Delphinium glaucescens
- biological control
- poisonous weeds
- weed control
- pastures
- sheep
- cattle
- Montana
- grazing
- Library Collection RecordPaper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. Stocking rate, multi-species grazing, and grazing systems are 3 components…Publication Date 1992-01-01
- Hymenoxys odorata
- Nolina
- nolina texana
- mixed grazing
- losses
- toxicity
- Quercus
- stocking rate
- death
- sheep
- goats
- cattle
- Texas
- grazing
- poisonous plants
- Library Collection RecordThirty-six wethers were used in 3 trials to compare estimates of fecal output using chromic oxide either in a continuous-release bolus or dosed twice daily. Wethers were confined in metabolism crates…Publication Date 1991-07-01
- continuous release bolus
- fecal output
- boluses
- chromic oxide
- dosage
- feces composition
- feces
- sheep
- forage
- feed intake
- Library Collection RecordSheep are more resistent to larkspur (Delphinium spp.) poisoning than are cattle, and may be used as a biological tool to graze larkspur prior to cattle turn-in to reduce the risk of cattle poisoning…Publication Date 1991-11-01
- Delphinium glaucescens
- Delphinium occidentale
- alkaloids
- Delphinium barbeyi
- sheep
- Montana
- grazing
- Library Collection RecordEffects of sheep grazing in Douglas-fir (Pseudotsuga menziesii) plantations in Oregon’s Coast Range were studied in 1981 through 1983 to determine the impact of grazing on big game habitat. Biomass,…Publication Date 1990-05-01
- Cervus elaphus
- Pseudotsuga menziesii
- forest plantations
- game management
- environmental impact reporting
- Oregon
- digestibility
- Odocoileus hemionus
- Odocoileus
- sheep
- habitat improvement
- grazing
- dry matter
- Library Collection RecordEight domestic sheep (Ovis aries L.) ewes were fitted with radio collars and tracked during the 1985 grazing season in Trysll, Hedmark County, southern Norway. The ewes were relocated 761 times…Publication Date 1991-01-01
- habitat selection
- activity
- Picea abies
- Dryopteris
- behavior
- behavior patterns
- grazing trials
- Norway
- summer
- diets
- sheep
- grazing behavior
- rangelands
- 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 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 RecordTwo digestibility and nitrogen balance studies were conducted to evaluate nutrient utilization of 3 commonly browsed range plants by the desert sheep in Northern Saudi Arabia. In experiment 1, 15…Publication Date 1989-01-01
- Haloxylon
- najdi
- nutrients
- physiology
- Acacia
- Saudi Arabia
- Atriplex
- alfalfa
- digestibility trials
- forage evaluation
- nitrogen
- sheep
- diet studies
- Library Collection RecordThe possibility of using livestock as a biological agent to control unwanted ground vegetation in Pacific Northwest coniferous forests has been discussed for over 50 years. However, little…Publication Date 1989-01-01
- agroforestry
- woody weeds
- biological control
- brush control
- Pseudotsuga menziesii
- forest plantations
- Oregon
- sheep
- grazing
- Library Collection RecordSilicon in forage reduces dry matter digestibility and may reduce grazing preference. Two studies were conducted with the following objectives: (1) to evaluate a method of determining grazing…Publication Date 1989-03-01
- silicon
- species differences
- Idaho
- sheep
- phenology
- grasses
- feeding preferences
- Library Collection RecordA method for manufacturing esophageal cannulas from plastic tee couplers of suitable size for growing steers and wethers is described. This material was digitized as part of a cooperative project…Publication Date 1988-05-01
- unit costs
- production
- esophageal fistula
- performance
- methodology
- cannulas
- sheep
- cattle
- Library Collection RecordFifteen cattle (236-500 kg) and 38 sheep (36-55 kg) were fitted with 2 types of indwelling cecal cannulae. Cannulae were made of either clear silicone or plastic tubing. The surgery was conducted in…Publication Date 1987-07-01
- silicone tubes
- surgery
- plastic pipes
- cannulas
- cannulation
- sheep
- cattle
- Library Collection RecordSmall ruminant production in northeast Brazil is limited by prolonged nutritional stress during the dry season. Our study assessed the effects of clearcutting woody vegetation on the nutrition of…Publication Date 1987-09-01
- forest litter
- tropics
- north east brazil
- clearcutting
- forests
- dry seasons
- animal nutrition
- semiarid zones
- sheep
- goats
- grazing
- forage
- feed intake
- Library Collection RecordResearchers continue to oven- and air-dry extrusa samples from esophageally fistulated animals, despite evidence that this practice leads to erroneous nutritional evaluations. Two studies were…Publication Date 1988-07-01
- drying
- esophageal fistula
- phenolic compounds
- chemical composition
- sheep
- diet studies
- goats
- Brazil
- in vitro digestibility
- rangelands
- nutritive value
- forage
- Library Collection RecordInfiltration, sediment concentration of runoff, and sediment production from lightly grazed and ungrazed semiarid slopes were compared using a hand-portable rainfall simulator. The study slope was…Publication Date 1988-07-01
- hydrologic factors
- mountains
- mountain areas
- sediments
- highlands
- runoff
- slopes
- semiarid zones
- sheep
- rangelands
- grazing
- infiltration
- New Mexico
- Library Collection RecordUse of livestock for biological weed control in timber plantations is gaining popularity in the United States and elsewhere. Efficient use of livestock to control unwanted brush relies upon knowledge…Publication Date 1987-11-01
- forest management
- biological control
- brush control
- Pseudotsuga menziesii
- forest plantations
- Oregon
- diets
- sheep
- seasonal variation
- botanical composition
- grazing
- forage
- feeding preferences
- Library Collection RecordInfluences of grazing intensity on species composition and herbage production of grass-woodland and improved grassland subtypes of annual range were evaluated over a 5-year period in coastal northern…Publication Date 1987-03-01
- grassland utilization
- grasslands
- responses
- yields
- productivity
- grazing intensity
- California
- sheep
- botanical composition
- rangelands
- grazing
- forage
- Library Collection RecordThe influence of crude terpenoid content on in vitro organic matter digestibility (IVOMD) was determined for basin big sagebrush (Artemisia tridentata Nutt. ssp. tridentata), Wyoming big sagebrush (A…Publication Date 1987-05-01
- terpenoids
- Artemisia tridentata
- Odocoileus hemionus
- sheep
- cattle
- in vitro digestibility
- Montana
- Library Collection RecordInfiltration rate and sediment production were measured over a 2-year period on an intensive rotationally grazed pasture. Measurements were taken prior to the movement of livestock onto the pasture,…Publication Date 1986-11-01
- intensive livestock farming
- hydrology
- sediments
- pastures
- rotational grazing
- sheep
- goats
- cattle
- Texas
- seasonal variation
- rangelands
- grazing
- infiltration
- 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 RecordCuticular imprints of underlying plant tissue which survive ruminant digestion in herbivore feces provide a reliable taxonomic basis for species identification provided they can be adequately…Publication Date 1987-03-01
- epidermis
- cuticle
- Medicago sativa
- histology
- feces composition
- Sorghastrum nutans
- diets
- sheep
- Library Collection RecordAlthough there have been several reports on the food habits of domestic herbivores in various semiarid regions of the world, there has been no previous report on the partitioning of forage resources…Publication Date 1987-01-01
- camels
- forage selection
- pastoralism
- arid zones
- Kenya
- sheep
- diet studies
- goats
- grazing behavior
- cattle
- range management
- seasonal variation
- rangelands
- Library Collection RecordInfiltration rate and sediment production were measured for 2 years on 3 pastures from an intensive rotational grazing system. The pastures were 32, 24, and 16 ha in size. Stocking rate was held…Publication Date 1986-11-01
- soil water relations
- hydrology
- sediments
- stocking rate
- pastures
- rotational grazing
- sheep
- goats
- cattle
- Texas
- grazing
- infiltration
- 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 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 RecordFew detailed comparisons have been made among alfalfa (Medicago spp.) cultivars and strains grazed in semiarid, rangeland environments. The objective of this study was to determine survival and vigor…Publication Date 1986-01-01
- germplasm
- Medicago
- cultivars
- regrowth
- sheep
- establishment
- rangelands
- grazing
- North Dakota
- Library Collection RecordThe dietary botanical composition of indigenous sheep and goats was determined in the semiarid tropics of northeastern Brazil, using esophageally fistulated animals. Sheep and goats selected similar…Publication Date 1986-01-01
- semiarid zones
- sheep
- adaptability
- diet studies
- goats
- Brazil
- woodlands
- grazing behavior
- dry environmental conditions
- deciduous seasonal forests
- Library Collection RecordThe effect of hunger satiation on selectivity for diet quality by sheep grazing a smooth bromegrass (Bromus inermis) pasture was studied with esophageal fistulated sheep. Fifteen wethers (45.8 +/- .7…Publication Date 1985-07-01
- hunger
- satiety
- Bromus inermis
- sheep
- diet studies
- 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 RecordNutritional composition of sheep diets from a serpentine barrens range site was determined at various seasons and stages of plant growth and compared to diets from 3 other annual range sites. Sheep…Publication Date 1986-01-01
- serpentine soils
- nutrient contents of plants
- digestibility
- California
- sheep
- diet studies
- grazing behavior
- rangelands
- Library Collection RecordPredation at the University of California Hopland Field Station was evaluated for an 11-year period beginning in 1973. Of those lambs placed on range, an average of 2.7% were killed each year by…Publication Date 1985-09-01
- coasts
- losses
- predators
- California
- sheep
- rangelands
- Library Collection RecordEsophageal fistulation provides a well-documented standard for herbivore dietary composition studies against which other methods may be calibrated. Modified surgical procedures and animal husbandry…Publication Date 1985-01-01
- surgery
- esophageal fistula
- diet study techniques
- sheep
- Library Collection RecordFactors possibly associated with high (over 5%) and low (0-5%) predation intensities were compared among 95 sheep or goat producers in 5 states to determine if important differences were evident…Publication Date 1984-09-01
- losses
- predation
- ranching
- Idaho
- Oregon
- California
- sheep
- goats
- Texas
- North Dakota
- Library Collection RecordTebuthiuron [N-(5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl)-N,N′-dimethylurea] pellets (20% ai) were broadcast at 0.2 kg increments to 1.0 kg/ha onto a sand shinnery oak (Quercus havardii) community…Publication Date 1984-11-01
- Quercus havardii
- grass yield
- Rates
- tebuthiuron
- sand shinnery oak
- Oak Canopy
- herbicide treatments
- Southern High Plains
- control
- drought
- Texas
- management
- Library Collection RecordSeventy-two Navajo ranchers were questioned about the role of mixed-breed dogs with their flocks. Navajos call their dogs "sheep dogs" but, unlike sheep dogs used by other ranchers to…Publication Date 1985-01-01
- coyotes
- predation
- ranching
- guard dogs
- sheep
- goats
- Arizona
- Library Collection RecordAn improved bag for collecting samples from esophageal fistulated ewes was tested. The new bag reduced the time required to fit it to the animal and to remove the collected forage. This material was…Publication Date 1984-09-01
- esophageal fistula
- diet study techniques
- sheep
- Library Collection RecordEsophageal fistulation, stomach content analysis, fecal analysis, and forage utilization were compared as techniques for determining food habits of large herbivores. Each technique was evaluated…Publication Date 1983-05-01
- sheep
- Library Collection RecordEffects of 5-paddock rotational grazing and continuous grazing were monitored in 1977 and 1978 on an annual grass-subclover (Trifolium subterraneum) pasture. More forage was available to livestock…Publication Date 1983-07-01
- Subclover (Trifolium subterraneum) pasture
- sheep
- Oregon
- Library Collection RecordManagement of feral and Mouflon sheep and feral goats within the Mauna Kea Forest Reserve/Game Management area has been criticized as inadequate to prevent the adverse environmental impact which…Publication Date 1983-07-01
- Hawaii
- Sophora chrysophylla
- sheep
- goats
- Library Collection RecordFifteen independent variables consisting of circumference, surface area, and volume for various assumed shapes were derived from simple diameter and height measurements. These variables were used in…Publication Date 1982-07-01
- Idaho
- sheep