Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 201 - 250 of 442 results
- Library Collection RecordLeafy spurge (Euphorbia esula L), an aggressive Eurasian forb, is invading native upland ranges dominated by bluebunch wheatgrass (Pseudoroegneria spicata [Pursh] A. Love) and Idaho fescue (Festuca…Publication Date 1998-03-01
- Festuca idahoensis
- Pseudoroegneria spicata
- seed banks
- Euphorbia esula
- Idaho
- sheep
- plant density
- grazing
- plant height
- Library Collection RecordSpotted knapweed (Centaurea Maculosa Lam.), a Eurasian perennial forb, is replacing many native perennial grasses, such as Idaho fescue (Festuca idahoensis Elmer.), in foothills of the Northern Rocky…Publication Date 1997-07-01
- native plants
- Festuca idahoensis
- weed control
- seedlings
- Idaho
- plant communities
- sheep
- plant density
- Centaurea maculosa
- range management
- grazing
- Library Collection RecordResearch on diet selection is limited by inadequate techniques for determining botanical composition of diets. Our objective was to determine if near infrared reflectance spectroscopy (NIRS) of fecal…Publication Date 1998-07-01
- spectral analysis
- alfalfa
- alfalfa hay
- Euphorbia esula
- calibration
- feces
- infrared spectroscopy
- hay
- sheep
- goats
- feeding preferences
- Library Collection RecordThe objective of this study was to determine how rangeland hydrology of oak, juniper, bunchgrass and shortgrass vegetation types is altered by fire. The research was conducted at the Sonora…Publication Date 1997-03-01
- bunchgrass
- shortgrasses
- Aristida
- soil aggregates
- Juniperus ashei
- soil organic matter
- water yield
- Quercus virginiana
- woodland grasslands
- runoff
- prescribed burning
- sheep
- goats
- Texas
- sediment yield
- plant litter
- rangelands
- grazing
- infiltration
- grasses
- bulk density
- Library Collection RecordGrasslands of northern Tierra del Fuego sustain 1 sheep/ha and are very extensively managed, with flocks roaming freely in large paddocks (2,000-4,000 ha). This system requires knowledge of landscape…Publication Date 1998-01-01
- lamb production
- ecotypes
- Poa
- extensive livestock farming
- indicator species
- landscape ecology
- ground cover
- soil fertility
- mortality
- stocking rate
- natural grasslands
- plant communities
- sheep
- Argentina
- botanical composition
- soil water
- Library Collection RecordKnowing that sheep or goats can be used to control brush we quantified pasture changes during and after brush control. Over an 8-year period we measured the effects of control (no soil amendment),…Publication Date 1997-03-01
- liming
- West Virginia
- forage legumes
- phosphorus fertilizers
- brush control
- soil pH
- grazing experiments
- sheep
- goats
- application rates
- botanical composition
- Library Collection RecordDespite extensive coverage and long-term use, the extent to which shadscale [Atriplex confertifolia (Torr. &Frem.) Wats.] community dynamics are driven by grazing rather than by climate and…Publication Date 1998-03-01
- artemisia spinescens
- Hilaria
- Sporobolus cryptandrus
- Achnatherum hymenoides
- Atriplex confertifolia
- rain
- Krascheninnikovia lanata
- sheep
- biomass
- seasonal variation
- Utah
- canopy
- grazing
- Library Collection RecordMost farms in the semi-arid region of Morocco are mixed cereal-livestock producers. Livestock, dominated by sheep, account for more than one third of farm income but production is far below potential…Publication Date 1998-05-01
- wool production
- Medicago polymorpha
- Medicago truncatula
- ley farming
- Morocco
- fallow
- lambs
- ewes
- liveweight gain
- body weight
- rain
- semiarid zones
- sheep
- drought
- grazing
- Library Collection RecordDepth to a root restricting layer affects both soil moisture and nutrient availability, resources strongly correlated to plant cover and production. We evaluated the potential of 2 electromagnetic…Publication Date 1998-07-01
- Artemisia tripartita
- Balsamorhiza
- Pseudoroegneria spicata
- autumn
- soil depth
- electrical conductivity
- controlled grazing
- spring
- sheep
- botanical composition
- Library Collection RecordSoil nutrients in topsoils (0-7.5 cm) on grazed hilly and steep land on 2 high country sheep farms with contrasting climate in the upper Waitaki district, South Island, New Zealand, were compared…Publication Date 1996-07-01
- cation exchange capacity
- upland soils
- topsoil
- New Zealand
- sown grasslands
- highlands
- pH
- sustainability
- sheep
- grazing
- Library Collection RecordLeafy spurge (Euphorbia esula L.) is a noxious weed on rangelands throughout the Northern Great Plains. Most of these ranges are grazed by cattle which do not use leafy spurge as forage. Although…Publication Date 1996-07-01
- profits
- cattle production
- fencing
- farm budgeting
- carrying capacity
- Euphorbia esula
- ranching
- cost-benefit analysis
- stocking rate
- selective grazing
- sheep
- Montana
- Library Collection RecordChanges in the vegetation and soil surface were assessed along a grazing intensity gradient on rangelands of the Punta Ninfas area in southern Argentina. Thirty-two transects were sampled in areas…Publication Date 1995-11-01
- woody weeds
- indicator species
- soil types
- steppes
- grazing intensity
- shrubs
- sheep
- overgrazing
- biomass
- Argentina
- botanical composition
- rangelands
- canopy
- grasses
- forage
- Library Collection RecordTarbush (Flourensia cernua DC.) contributes substantially to the Chihuahuan Desert shrub biomass, but is browsed sparingly by livestock. This study was designed to assess nutritional benefits and/or…Publication Date 1996-07-01
- pleuraphis mutica
- volatile fatty acids
- dose response
- leaves
- Flourensia
- rumen fluids
- water intake
- body weight
- fiber content
- crude protein
- digesta
- pH
- transit time
- sheep
- rumen fermentation
- grasses
- New Mexico
- dry matter
- feed intake
- Library Collection RecordFlourensia cernua DC. (tarbush) is a deciduous shrub with potential as a high-protein forage source for livestock. Twenty-four Polypay X Rambouillet wethers housed in metabolism crabs were used to…Publication Date 1996-07-01
- pleuraphis mutica
- cholesterol
- blood chemistry
- digestible protein
- nitrogen retention
- urea
- alfalfa
- nitrogen balance
- weed palatability
- leaves
- Flourensia
- body weight
- sheep
- grasses
- New Mexico
- dry matter
- feed intake
- Library Collection RecordThe effects of reducing sheep grazing on upland vegetation and wild herbivores was studied at 11 sites in the Scottish Highlands. Areas where sheep had been removed for periods of up to 25 years were…Publication Date 1996-07-01
- Scotland
- sward
- voles
- sheep manure
- ecological succession
- Cervus elaphus
- stocking rate
- prescribed burning
- plant communities
- sheep
- botanical composition
- rangelands
- canopy
- grazing
- plant height
- Library Collection RecordLehmann lovegrass (Eragrostis lehmanniana Nees) seed (germination 96%, dormant 0%) was used in 4 experiments to study the potential of sheep as a dispersal agent. Five, 4-year-old, ruminally…Publication Date 1997-01-01
- mastication
- sheep dung
- seed dispersal
- seeds
- selective grazing
- sheep
- in vitro digestibility
- rumen fermentation
- seed germination
- Eragrostis lehmanniana
- introduced species
- Library Collection RecordThe objective of this study was to evaluate the potential of near infrared reflectance spectroscopy (NIRS) for estimating botanical composition of esophageal extrusa samples. Spectral data were…Publication Date 1996-03-01
- sampling
- Andropogon gerardii
- esophagus
- infrared spectroscopy
- forbs
- diet
- Oklahoma
- digesta
- sheep
- cattle
- botanical composition
- grasses
- Library Collection RecordThe relation was studied between the applied stocking rates and the degree to which sheep grazed stems of various karoobush species. A rule of thumb exists amongst farmers and research workers in the…Publication Date 1996-03-01
- Asteraceae
- Eriocephalus
- pentzia spinescens
- rosenia humilis
- eriocephalus ericoides
- stems
- prediction
- South Africa
- palatability
- stocking rate
- diameter
- selective grazing
- semiarid zones
- sheep
- Library Collection RecordMore information about the effects of combining intensive livestock grazing of noxious weeds and associated desirable plants with other control measures is needed to develop effective rangeland weed…Publication Date 1996-07-01
- Euphorbia esula
- Poa pratensis
- rain
- selective grazing
- species differences
- sheep
- cattle
- plant density
- picloram
- biomass
- Montana
- grazing
- feeding preferences
- Library Collection RecordA metabolism study evaluated the influence of increasing quantities (0-30% dry matter basis) of mountain big sagebrush (Artemisia tridentata ssp. vaseyana Rydb. Beetle) on dry matter intake and in…Publication Date 1995-11-01
- urine
- nitrogen balance
- feces
- chemical composition
- voluntary intake
- hay
- digestibility
- Wyoming
- Artemisia tridentata
- sheep
- nitrogen content
- dry matter
- feed intake
- Library Collection RecordSheep are often used to graze North American rangelands infested with leafy spurge (Euphorbia esula L.), a long-lived perennial forb from Eurasia. Our objective was to determine if sheep grazing…Publication Date 1997-01-01
- fleece
- sheep dung
- seed dispersal
- viability
- Euphorbia esula
- rain
- seeds
- sheep
- seed germination
- grazing
- Library Collection RecordSheep diets were determined seasonally for large flocks grazing year-round in 2 landscape types of the Magellanic steppe of Argentina. A tussock-grass steppe of Festuca gracillima Hooker f. dominates…Publication Date 1996-01-01
- tertiary sediments
- Festuca gracillima
- Festuca
- tussock grasslands
- steppes
- steppe soils
- species diversity
- diet
- woody plants
- sheep
- seasonal variation
- Argentina
- canopy
- forage
- Library Collection RecordThe objective of these studies was to compare preference for leafy spurge (Euphorbia esula L.) by sheep and goats. Study 1 was a choice test that paired leafy spurge with either arrowleaf balsamroot…Publication Date 1994-11-01
- Balsamorhiza sagittata
- Balsamorhiza
- biological control
- Euphorbia esula
- Agropyron cristatum
- Idaho
- sheep
- goats
- grazing behavior
- feeding preferences
- Library Collection RecordBotanical composition of llamas and sheep diets were quantified monthly during 1 year in the arid highlands of Bolivia to identify competition between these species for forage resources. Results…Publication Date 1994-05-01
- Bolivia
- performance
- Festuca
- llamas
- high altitude
- festuca orthopylla
- arid zones
- voluntary intake
- species differences
- diet
- digestibility
- shrubs
- sheep
- seasonal variation
- botanical composition
- grasses
- forage
- feeding preferences
- Library Collection RecordThe sequence of species selection over the grazing period directly determines the effectiveness of different grazing systems. Knowledge of this sequence is also important in understanding the plant-…Publication Date 1995-07-01
- Tristachya
- tirstachya leucothrix
- Themeda triandra
- Eragrostis plana
- Hyparrhenia hirta
- South Africa
- veld
- tillers
- sheep
- cattle
- range management
- botanical composition
- defoliation
- grazing
- feeding preferences
- Library Collection RecordGrazing trials were conducted during early and late spring of 1988 and 1989 to evaluate the impact of sheep grazing duration and stocking density on grazing efficiency and forage selectivity in tall…Publication Date 1994-11-01
- Trifolium subterraneum
- Festuca arundinacea
- grazing trials
- duration
- efficiency
- stocking rate
- spring
- Oregon
- sheep
- grazing behavior
- feed intake
- feeding preferences
- Library Collection RecordSpotted knapweed (Centaurea maculosa Lam.), an introduced perennial plant, has invaded large areas of rangeland in the northwestern United States. Grazing animals may disseminate the weed by…Publication Date 1995-03-01
- seed dispersal
- viability
- seedling emergence
- seeds
- transit time
- Odocoileus hemionus
- sheep
- Centaurea maculosa
- seed germination
- Montana
- Library Collection RecordOver the past century woody plants have increased in abundance on sites formerly occupied by grasslands in the Sonoran Desert. Woody plant invasion has been associated with a multitude of biological…Publication Date 1993-01-01
- desert rodents
- shrub invasion
- edaphic factors
- Acacia
- woody weeds
- sowing depth
- deserts
- weed biology
- Prosopis velutina
- seed dispersal
- grasslands
- seedling emergence
- invasion
- fires
- fire effects
- air temperature
- woody plants
- environmental factors
- sheep
- cattle
- seed germination
- establishment
- Arizona
- soil texture
- Library Collection RecordGlobemallows (Sphaeralcea spp.) are native, drought-resistant forbs of interest for inclusion in seed mixtures for semiarid rangeland renovation. Little is known of their nutritional value for…Publication Date 1993-03-01
- Sphaeralcea
- sphaeralcea grossulariifolia
- sphaeralcea parvifolia
- Sphaeralcea coccinea
- nutrient content
- arid lands
- pastures
- Idaho
- diets
- sheep
- grazing behavior
- nutritive value
- forage
- Library Collection RecordWhitetop or heart-podded hoary cress (Cardaria draba (L.) Desv.) is an Eurasian native of the Cruciferae actively invading rangelands throughout western North America. The plant is reported to be…Publication Date 1993-05-01
- Lepidium draba subsp. draba
- glucosinolates
- toxicity
- nutrient content
- poisonous weeds
- pastures
- sheep
- cattle
- in vitro digestibility
- nutritive value
- forage
- chemical constituents of plants
- Library Collection RecordPlant structure should be an important determinant of species acceptability to grazing ungulates functioning under various time-energy constraints. The acceptability of 9 grasses to sheep grazing a…Publication Date 1993-05-01
- Cynodon dactylon
- agronomic traits
- tensile strength
- Eragrostis plana
- Hyparrhenia hirta
- Sporobolus indicus var. capensis
- eragrostis capensis
- eragrostis gummiflua
- michrocloa caffra
- leaves
- Eragrostis
- Eragrostis curvula
- stems
- Paspalum notatum
- plant morphology
- South Africa
- Poaceae
- sheep
- grazing behavior
- feeding preferences
- Library Collection RecordBecause of the ongoing controversy about shrub forage value for different ungulates and significance of the shrub communities for spring-fall grazing in southcentral Wyoming, the relative importance…Publication Date 1992-11-01
- livestock-wildlife relationships
- common use grazing
- common lands
- wildlife
- Purshia tridentata
- browse plants
- Cervus elaphus
- Antilocapra americana
- mountain grasslands
- Wyoming
- Artemisia tridentata
- plant communities
- Odocoileus hemionus
- shrubs
- diets
- sheep
- cattle
- rangelands
- grasses
- forage
- 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
Pagination
- First page
- Previous page
- …
- 3
- 4
- 5
- 6
- 7
- …
- Next page
- Last page