Rangeland Ecology & Management
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Displaying 101 - 150 of 556 results
- Library Collection RecordThe perceived economic damage to forage crops in Montana attributed to native ungulates during 1992 was estimated using a mail survey of 2,200 randomly selected farms and ranches. The 1,120…Publication Date 1996-07-01
- farm surveys
- crop damage
- crop losses
- vertebrate pests
- compensation
- hay fields
- haystacks
- fields
- farm size
- Odocoileus virginianus
- pastures
- Antilocapra americana
- hay
- Odocoileus hemionus
- Cervus elaphus canadensis
- Montana
- Library Collection RecordAbility to compete with alien weeds may be one factor enabling high-seral, native bunchgrasses to persist on degraded rangelands. This study examined the effect of competition from cheatgrass (Bromus…Publication Date 1995-09-01
- strain differences
- selection responses
- ecotypes
- Festuca idahoensis
- shoots
- Bromus tectorum
- pastures
- weight
- Oregon
- tillers
- biomass production
- plant competition
- rangelands
- plant height
- Library Collection RecordThirty-six weanling steer calves (avg wt = 174 +/- 14 kg) were grazed on either wheat, irrigated improved, or native rangeland pastures from December 1989 to December 1990. Irrigated improved…Publication Date 1995-11-01
- Triticum aestivum
- Festuca arundinacea
- irrigated pastures
- Cynodon dactylon
- grassland improvement
- liveweight gain
- Bothriochloa ischaemum
- yields
- chemical composition
- pastures
- diet
- steers
- digestibility
- New Mexico
- forage
- dry matter
- feed intake
- Elytrigia elongata
- Library Collection RecordFecal microhistology and chemistry were used to evaluate botanical composition and quality of diets selected by Brangus cattle grazing Chihuahuan desert range in 3 seasons; fall: October, 1991;…Publication Date 1995-11-01
- phenotypic correlation
- sires
- free range husbandry
- genetic variance
- autumn
- heritability
- feces composition
- Brangus
- pastures
- spring
- summer
- biomass
- botanical composition
- grazing
- New Mexico
- beef cattle
- feeding preferences
- 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 RecordEighty 2-year-old spring calving primiparous cows were assigned to 2 weaning and 2 grazing treatments (20 cows/treatment) from 7 September to 7 November in 1991, 1992, and 1993. Grazing treatments…Publication Date 1997-01-01
- subsurface irrigation
- dry periods
- lactation
- weaning
- lactation number
- irrigated pastures
- body condition
- liveweight gain
- calves
- body weight
- fiber content
- pastures
- Nebraska
- beef cows
- crude protein
- in vitro digestibility
- grazing
- forage
- feed intake
- Library Collection RecordInformation is lacking on the influence of range condition on wildlife populations in the Chihuahuan Desert. Wildlife observations were made along transects on ranges in excellent and good ecological…Publication Date 1996-11-01
- arid grasslands
- wildlife
- species diversity
- range condition
- stocking rate
- pastures
- botanical composition
- grazing
- New Mexico
- Library Collection RecordFecal output of range cows was determined during 2 periods of summer (period I) and late summer (period II) grazing using a constant release intraruminal Cr2O3 bolus. Chromic oxide contamination was…Publication Date 1995-05-01
- chromic oxide
- controlled release
- contamination
- experimental bias
- errors
- feces composition
- pastures
- beef cows
- grazing
- forage
- Library Collection RecordA 4-year study was conducted on Kansas Flint Hills bluestem range to monitor animal gain, grass, and forb standing biomass following grazing, plant population dynamics, and in 2 years, subsequent…Publication Date 1995-05-01
- feed conversion
- dressing percentage
- carcass weight
- sorghum
- Sorghastrum nutans
- warm-season grasses
- Schizachyrium scoparium
- Poa pratensis
- Kansas
- liveweight gain
- grazing experiments
- pastures
- Andropogon gerardii
- steers
- feed supplements
- biomass
- botanical composition
- grasses
- beef cattle
- Library Collection RecordDynamic programming was used to obtain optimal management and marketing policies for stocker operations in Southeastern Colorado under different stocking rates, rainfall, and price scenarios.…Publication Date 1995-01-01
- dynamic programming
- risk
- marginal returns
- market prices
- rain
- stocking rate
- pastures
- range management
- 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 RecordInformation is presented on the suitability of various drills for direct seeding into permanent pastures and rangelands in Saskatchewan. Strips of sod 30 to 100-cm wide were killed during the growing…Publication Date 1992-09-01
- comparison
- seed drills
- direct seeding
- crop establishment
- permanent grasslands
- Medicago sativa
- seedling emergence
- Saskatchewan
- pastures
- soil water content
- seed germination
- range management
- Library Collection RecordThe effects of 3 brush cover proportions (Low Brush pasture: 52% brush/32% herbage, Medium Brush pasture: 62% brush/20% herbage, and High Brush pasture: 66% brush/12% herbage) on dietary selection of…Publication Date 1993-05-01
- Quercus coccifera
- availability
- Greece
- pastures
- shrubs
- diets
- goats
- seasonal variation
- botanical composition
- rangelands
- grazing
- forage
- Library Collection RecordEphemeral channels may be greater contributors to nonpoint sediment loads than perennial channels because of their abundance and lower vegetative cover. This study examines above- and belowground…Publication Date 1993-01-01
- channels
- cold deserts
- floodplains
- annuals
- deserts
- streams
- highlands
- riparian buffers
- perennials
- pastures
- woody plants
- precipitation
- sustainability
- Wyoming
- plant density
- grazing
- grasses
- Library Collection RecordImpacts of 7 range treatments and climate on late spring herbage standing crops (SC) were measured in rangelands near Miles City, Mont., from 1983 to 1990. Treatments, established in 8 pastures at 2…Publication Date 1993-07-01
- ambient temperature
- rain
- pastures
- biomass production
- range management
- Montana
- Library Collection RecordResearch was conducted at the Sonora Research Station during a 4-year period (1984 to 1988) to measure differences in herbaceous vegetation response between two 7-pasture 1-herd grazing systems.…Publication Date 1993-03-01
- ewes
- dry matter accumulation
- grazing trials
- ecological succession
- stocking rate
- pastures
- heifers
- growth rate
- grazing intensity
- Texas
- botanical composition
- grazing
- forage
- 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 RecordCaldén (Prosopis caldenia Burk.) is one of the woody species that is increasing in abundance due to poor grazing management in the semiarid region of central Argentina. The objectives of this work…Publication Date 1992-11-01
- Prosopis caldenia
- woody plant invasion
- edaphic factors
- scarification
- Prosopis
- soil temperature
- seedling emergence
- water availability
- pastures
- soil water content
- plant communities
- shrubs
- semiarid zones
- overgrazing
- seed germination
- Argentina
- grazing
- Library Collection RecordFire-scorched crowns of live eastern redcedar (Juniperus virginiana L.) were ignited using a propane torch in 3 studies to quantify the efficacy and to determine the feasibility of the technique as a…Publication Date 1992-09-01
- brush control
- vegetation management
- pastures
- prescribed burning
- Oklahoma
- Juniperus virginiana
- range management
- Library Collection RecordReduced pasture size and distance to water may be responsible for the alleged benefits of intensive time-controlled rotation grazing systems. We compared cattle gains, activity, distance traveled,…Publication Date 1993-01-01
- size
- drinking water
- grazing time
- distance travelled
- controlled grazing
- liveweight gain
- continuous grazing
- duration
- pastures
- rotational grazing
- grazing behavior
- grazing
- beef cattle
- Library Collection RecordEffects of burning, mowing, and 2,4-D on antelope bitterbrush (Purshia tridentata Pursh.) nutrient contents were evaluated in southcentral Wyoming. During the first growing season following…Publication Date 1992-09-01
- mowing
- 2,4-D
- crop quality
- ash
- Purshia tridentata
- fires
- fire effects
- pastures
- winter
- prescribed burning
- phosphorus
- summer
- Wyoming
- in vitro digestibility
- nitrogen content
- range management
- seasonal variation
- nutritive value
- forage
- chemical constituents of plants
- Library Collection RecordA 3-year field study was conducted near Grassrange, Montana. (Latitude 46 degrees 50'N and Longitude 108 degrees 50'W) to determine the effect of leafy spurge (Euphorbia esula L.) shoot…Publication Date 1992-07-01
- Euphorbia esula
- weed control
- chemical control
- pastures
- grazing behavior
- cattle
- plant density
- picloram
- Montana
- forage
- Library Collection RecordMultiparous cows (n = 91, 1986; n = 92, 1987) were selected from 2 populations to obtain cattle with high and low milk production. After March-April calving, high and low producing cows grazed either…Publication Date 1993-11-01
- sown grasslands
- body condition
- milk yield
- pastures
- beef cows
- Montana
- grazing
- 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 RecordThe relatively low productivity of the herbaceous stratum of the oak-hickory forests of North America has prompted land managers to evaluate alternative means of increasing large herbivore production…Publication Date 1992-09-01
- linear programming
- econometric models
- costs and returns
- hunting
- multiple land use
- decision making
- cost-benefit analysis
- livestock production
- brush control
- vegetation management
- pastures
- Oklahoma
- wildlife management
- range management
- 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 RecordA 9-year grazing trial was conducted to compare shortgrass vegetation and steer responses under intensive-early stocking (IES) at 2 stocking rates to season-long stocking (SLS). The stocking rates…Publication Date 1993-03-01
- intensive forestry
- Kansas
- liveweight gain
- grazing trials
- stocking rate
- pastures
- steers
- sustainability
- botanical composition
- grazing
- beef cattle
- Library Collection RecordTotal vegetation cover, forage species cover, litter cover, and carrying capacity were determined during 3 growing seasons (1979-80, 1980-81, and 1981-82), for plots cleared of shrubs with or without…Publication Date 1992-09-01
- larrea cuneifolia
- carrying capacity
- arid lands
- brush control
- vegetation management
- pastures
- natural grasslands
- plant communities
- shrubs
- range management
- Argentina
- grazing
- Library Collection RecordWe evaluated winter weight gain of captive male white-tailed deer (Odocoileus virginianus) that grazed pastures of berseem (Trifolium alexandrinium L.), white (T. repens L.), crimson (T. incarnatum L…Publication Date 1992-11-01
- Trifolium alexandrinum
- Trifolium incarnatum
- Trifolium subterraneum
- Trifolium repens
- Lolium multiflorum
- liveweight gain
- Odocoileus virginianus
- pastures
- diets
- wildlife management
- rangelands
- nutritive value
- Library Collection RecordThree methods for determining proportions of botanical components, i.e., grasses, legumes, and forbs (nonleguminous dicots), of continuously grazed Mediterranean pastures were compared. Percentage…Publication Date 1993-05-01
- Portugal
- determination
- specific contribution
- percentage contribution
- percentage of sward
- sward
- evaluation
- measurements
- pastures
- botanical composition
- Library Collection RecordA comprehensive system has been designed to serve as a basis for rangeland condition and grazing capacity assessment. It is important that research information and knowledge be transferred to land…Publication Date 1992-03-01
- databases
- expert systems
- carrying capacity
- decision making
- crop production
- pastures
- range management
- rangelands
- grazing
- Library Collection RecordA 3-year experiment designed to quantify the spatial and temporal utilization patterns of range sites by beef cattle on summer foothill range was conducted on the Wick Brothers Management Unit of the…Publication Date 1991-05-01
- site types
- sloping land
- habitat selection
- behavior
- site factors
- soil types
- water availability
- pastures
- summer
- Wyoming
- plant communities
- spatial distribution
- seasonal variation
- grazing
- beef cattle
- feeding preferences
- Library Collection RecordCattle at a light stocking rate of 0.17 to 0.18 AUM/ha over a 35-day grazing season in summer preferred to graze on lowland range sites, while elk in winter preferred upland range sites. We changed…Publication Date 1991-05-01
- animal competition
- sloping land
- foraging
- highlands
- lowlands
- habitats
- site factors
- soil types
- stocking rate
- pastures
- winter
- Wyoming
- grazing intensity
- Cervus elaphus canadensis
- grazing behavior
- cattle
- Library Collection RecordFour potential cattle grazing systems on summer range in the Sierra Nevada are compared in terms of deer harvest, number of hunters attracted, and the net economic value of hunting. Research on deer…Publication Date 1991-07-01
- net economic benefit
- national forests
- carrying capacity
- population density
- economic analysis
- hunting
- multiple land use
- pastures
- rotational grazing
- grazing intensity
- Odocoileus hemionus
- California
- cattle
- range management
- rangelands
- Library Collection RecordFreeze drying, conventional oven drying, and microwave oven drying were compared with respect to their effect on the chemical composition of native range forage and feces from cattle grazing the…Publication Date 1991-09-01
- convection dryers
- freeze drying
- forage dryers
- microwave dryers
- drying
- feces composition
- fiber content
- feces
- chemical composition
- pastures
- cattle
- forage
- Library Collection RecordWe studied use of pastures and habitats in relation to moderate cattle grazing for 19 radio-collared desert mule deer (Odocoileus hemionus crooki) in a southeastern Arizona grass-shrubland. For each…Publication Date 1991-09-01
- odocoileus hemionus crooki
- xeroriparian habitats
- home range
- semi-desert scrub
- habitat selection
- habitats
- pastures
- Odocoileus hemionus
- cattle
- grazing
- Arizona
- Library Collection RecordIn the central California region of annual rangeland, herbage production beneath blue oak (Quercus douglasii Hook & Arn.) canopies is greater and production beneath the canopies of interior live…Publication Date 1991-05-01
- cation exchange capacity
- edaphic factors
- soil organic matter
- soil density
- soil properties
- Quercus douglasii
- Quercus wislizeni
- Pinus sabiniana
- soil fertility
- pastures
- growth rate
- California
- rangelands
- canopy
- bulk density
- forage
- 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 RecordInterest in evaluating theoretical considerations in traditional methods of determining range condition have increased recently with application of different analytical techniques. In this study, the…Publication Date 1991-07-01
- cluster analysis
- quantitative climax approach
- deserts
- land classification
- secondary succession
- spatial variation
- climax communities
- grasslands
- plant ecology
- ecological succession
- pastures
- biomass production
- botanical composition
- rangelands
- New Mexico
- forage
- Library Collection RecordEsophageal fistulated animals are used to collect samples of the forage being consumed by animals in grazing experiments. Four principal hypotheses (H) can be tested in esophageal trials: (1)…Publication Date 1991-07-01
- livestock feeding
- fistulation
- clipping
- experimental design
- grazing trials
- statistical analysis
- pastures
- sampling
- esophagus
- livestock
- forage
- feeding preferences
- Library Collection RecordUneven distribution of livestock in large pastures results in some areas receiving more use than the average and some areas receiving little or no use. Six 2-ha experimental pastures on a shallow…Publication Date 1991-09-01
- grazing pressure
- twig diameter
- grazing strategy
- Acacia rigidula
- Acacia berlandieri
- stocking rate
- branches
- diameter
- pastures
- grazing intensity
- goats
- Texas
- canopy
- feeding preferences
- plant height
- Library Collection RecordVegetational response of a nine-paddock, short-duration grazing cell was compared to that of a continuous pasture for a 5-year period in southcentral New Mexico. Differences in vegetational response…Publication Date 1991-07-01
- grazing time
- vegetation cover
- standing crop
- stocking rate
- pastures
- vegetation
- Bouteloua gracilis
- biomass production
- grazing intensity
- cattle
- biomass
- range management
- botanical composition
- grazing
- New Mexico
- Library Collection RecordAerial phytomass and litter dynamics of a grassland steppe in Patagonia, Argentina, were studied at either monthly or bimonthly intervals for 2 years. This area is characterized by a cold and wet…Publication Date 1990-03-01
- Poa
- Bromus
- Poa ligularis
- festuca pallescens
- rytidosperma virescens
- bromus setifolius
- hordeum comosum
- Hordeum
- Festuca
- steppes
- population dynamics
- pastures
- Poaceae
- biomass production
- range management
- Argentina
- botanical composition
- Library Collection RecordRange condition is usually defined by similarity of current to climax or potential vegetation. It is often assumed that rangelands in low condition are biologically less productive than those in…Publication Date 1991-01-01
- seral stages
- site factors
- productivity
- pastures
- biomass production
- plant communities
- botanical composition
- rangelands
- Arizona
- forage
- Library Collection RecordClearing and thinning of caatinga vegetation in northeastern Brazil are viewed as methods of optimizing forage and wood production. Our study compared the botanical composition of goat diets relative…Publication Date 1990-11-01
- tropical forests
- caatinga
- thinning
- goat feeding
- deciduous forests
- silvopastoral systems
- clearcutting
- woodland grasslands
- pastures
- natural grasslands
- diets
- goats
- Brazil
- biomass
- seasonal variation
- botanical composition
- canopy
- forage
- Library Collection RecordSpoil material replaced after strip mining for lignite coal may differ from the original top soil with respect to concentrations of copper (Cu) and molybdenum (Mo), consequently levels of these…Publication Date 1990-01-01
- copper
- molybdenum
- trace element deficiencies
- reclaimed land
- nutrient deficiencies
- mined soils
- grazing trials
- pastures
- steers
- natural grasslands
- nutritive value
- forage
- North Dakota
- Library Collection RecordCrop coefficients (Kc) provide a means of relating evapotranspiration (ET) to standard references such as pan evaporation or other climatic based reference ET’s (ET = Kc*reference ET). They have been…Publication Date 1990-11-01
- lysimetry
- evaporation
- evapotranspiration
- measurements
- water requirements
- estimation
- transpiration
- South Dakota
- pastures
- Idaho
- Wyoming
- rangelands
- Library Collection RecordBotanical and chemical compositions of Angora goat (Capra hircus) diets, determined with esophageally cannulated animals, were studied with and independent of a cattle-sheep-goat herd in a short-…Publication Date 1990-03-01
- nutrient intake
- chemical composition
- pastures
- crude protein
- diets
- goats
- in vitro digestibility
- Texas
- botanical composition
- nutritive value
- grazing