Rangeland Ecology & Management
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Displaying 101 - 150 of 206 results
- Library Collection RecordThis study was prompted by concerns that expansion of elk (Cervus canadensus) ranges upward into subalpine grasslands might be damaging green fescue (Festuca viridula Vasey) meadows in Mount Rainier…Publication Date 1999-03-01
- Festuca viridula
- lupinus latifolius
- Festuca
- Lupinus
- Washington
- mountain grasslands
- grazing intensity
- Cervus elaphus canadensis
- biomass
- canopy
- Library Collection RecordRussian knapweed [Acroptilon repens (L.) DC.] is a creeping, perennial, unpalatable, noxious weed that infests thousands of rangeland and pasture hectares in the western U.S. often forming…Publication Date 1999-07-01
- mowing
- Elymus lanceolatus
- colonizing ability
- 2,4-D
- sowing
- costs and returns
- clopyralid
- sown grasslands
- Psathyrostachys juncea
- glyphosate
- Acroptilon repens
- Agropyron cristatum
- weed control
- seed germination
- biomass
- canopy
- Library Collection RecordThe objective of this research was to determine, on a seasonal basis, the relative preferences of cattle for 7 native grasses and d crested wheatgrass (Agropyron desertorum (Fischer ex Link)Schultes…Publication Date 1998-09-01
- vegetative growth
- flowering
- dormancy
- Agropyron desertorum
- fiber content
- selective grazing
- Oregon
- crude protein
- cattle
- plant density
- biomass
- phenology
- plant litter
- botanical composition
- grazing
- feeding preferences
- Library Collection RecordWe evaluated the species composition of soil seed banks from 9 farms (36 pastures total) located in the northeast United States. Our objective was to quantify the soil seed bank composition of…Publication Date 2000-01-01
- Northeastern United States
- Trifolium repens
- seed banks
- Poa pratensis
- cutting
- rotational grazing
- cattle
- seed germination
- biomass
- botanical composition
- Library Collection RecordSquirreltail [Elymus elymoides (Raf.) Swezey] is a native cool-season grass that has been observed to invade rangelands dominated by the weedy annual grasses, cheatgrass (Bromus tectorum L.) and…Publication Date 1998-09-01
- net assimilation rate
- greenhouses
- Taeniatherum caput-medusae
- Elymus elymoides
- colonizing ability
- Pseudoroegneria spicata
- leaf area
- seedling growth
- roots
- ratios
- Agropyron desertorum
- shoots
- seedlings
- Bromus tectorum
- Idaho
- growth rate
- biomass
- Utah
- Colorado
- dry matter
- Library Collection RecordEastern gamagrass (Tripsacum dactyloides (L.) L.) is a perennial warm-season bunchgrass that starts growth earlier in the spring than most other warm-season grasses. This suggests that combining…Publication Date 1999-11-01
- Tripsacum dactyloides
- Tripsacum
- protein content
- liveweight gain
- Bothriochloa ischaemum
- rain
- stocking rate
- Oklahoma
- grazing intensity
- in vitro digestibility
- biomass
- botanical composition
- nutritive value
- grazing
- beef cattle
- plant height
- maturity stage
- Library Collection RecordWhite-tailed deer (Odocoileus virginianus Zimm.) appear to concentrate foraging activity along the perimeters of warm-season food plots. Because of this, we tested the hypothesis that (1) providing…Publication Date 1999-01-01
- Lablab purpureus
- foraging
- mortality
- Odocoileus virginianus
- semiarid zones
- spatial distribution
- Texas
- biomass
- feeding preferences
- Library Collection RecordSummer burning was used to reduce spittlebug (Aeneolamia albofasciata Lall.) populations in buffelgrass [Cenchrus ciliaris (L.) Link] on the Carbo Livestock Research Station in Sonora, Mexico. Five…Publication Date 1999-11-01
- aeneolamia albofasciata
- developmental stages
- population density
- Mexico
- rain
- prescribed burning
- Cenchrus ciliaris
- biomass
- range management
- phenology
- pest control
- maturity stage
- Library Collection RecordHerbicidal control of spotted knapweed (Centaurea maculosa Lam.) on rangeland in the western United States has been most effective using residual herbicides, such as picloram (4-amino-3,5,6-…Publication Date 1999-09-01
- 2,4-D
- application timing
- weed control
- nitrogen fertilizers
- forbs
- plant density
- Centaurea maculosa
- application rates
- biomass
- range management
- introduced species
- Montana
- invasive species
- grasses
- maturity stage
- Library Collection RecordExpansion of western juniper (Juniperus occidentalis spp. occidentalis Hook.) woodlands in the sagebrush steppe has the potential to change composition, structure, and productivity of understory…Publication Date 2000-01-01
- logging effects
- soil water potential
- ground cover
- understory
- Poa pratensis
- species diversity
- Juniperus occidentalis
- forbs
- Oregon
- nitrogen content
- plant density
- biomass
- grasses
- soil water
- Library Collection RecordInformation on the yield of grasses as the plants mature is useful to optimize grazing potential and quality hay production. The objectives of this study were to compare the yield and feeding value…Publication Date 1999-01-01
- Elymus lanceolatus
- Elymus trachycaulus
- Bromus inermis
- Elytrigia intermedia subsp. intermedia
- Dactylis glomerata
- Festuca arundinacea
- Festuca rubra
- Alopecurus pratensis
- protein content
- Agropyron cristatum
- fiber content
- Alberta
- phosphorus
- calcium
- crude protein
- biomass
- grasses
- maturity stage
- Library Collection RecordDense stands of honey mesquite (Prosopis glandulosa Torr. var. glandulosa) negatively impact livestock handling and herbaceus forage production; however, very little information is available on the…Publication Date 1997-09-01
- thinning
- agroforestry
- stand density
- Prosopis glandulosa var. glandulosa
- multiple land use
- rain
- biomass production
- semiarid zones
- Texas
- biomass
- Library Collection RecordPatterns of bison (Bison bison L.) grazing were examined in a 2-year study on a tallgrass prairie site in Oklahoma subjected to a seasonally and spatially variable burning regime. Mixed groups of…Publication Date 1998-05-01
- area
- bulls
- bison
- gender differences
- selective grazing
- prescribed burning
- Oklahoma
- prairies
- biomass
- seasonal variation
- botanical composition
- Library Collection RecordAn analytical method for classifying ecological types was developed and tested for mountain meadows in central Nevada. Six ecological types were identified by plot sampling of vegetation and soil-…Publication Date 1997-05-01
- meadows
- indicator species
- land forms
- soil degradation
- soil temperature
- ecotones
- slope
- grazing intensity
- biomass
- botanical composition
- rangelands
- canopy
- soil compaction
- soil texture
- altitude
- Library Collection RecordA four-year study was conducted to investigate effects of continuous and short duration grazing in spring on standing crop and tiller density of crested wheatgrass [Agropyron desertorum (Fisch. ex…Publication Date 1997-03-01
- variation
- standing crop
- Agropyron desertorum
- continuous grazing
- Chrysothamnus viscidiflorus
- rain
- stocking rate
- rotational grazing
- steers
- tillers
- Artemisia tridentata
- plant density
- biomass
- canopy
- Library Collection RecordSpotted knapweed (Centaurea maculosa Lam.), an exotic member of the Compositae, infests large areas of rangeland in the northwestern United States. We assessed the impacts of infestation on a…Publication Date 1997-09-01
- seed clusters
- chicin
- noxious substances
- Cervus elaphus nelsoni
- leaves
- carrying capacity
- population density
- stems
- Cervus elaphus
- Odocoileus virginianus
- selective grazing
- species differences
- Idaho
- diet
- metabolizable energy
- crude protein
- Odocoileus hemionus
- plant density
- Centaurea maculosa
- biomass
- introduced species
- Library Collection RecordElk (Cervus elaphus) have been repeatedly observed to prefer rested units within rest-rotation grazing systems. Given the logistical and financial investments associated with the maintenance of these…Publication Date 1998-01-01
- animal husbandry
- Cervus elaphus
- rotational grazing
- browsing damage
- cattle
- wildlife management
- biomass
- range management
- browsing
- Library Collection RecordWe documented vegetation dynamics (April 1986-July 1989) as part of a larger study to understand botanical composition and nutritional components of cattle and deer diets under 2 grazing systems (…Publication Date 1997-11-01
- continuous grazing
- rain
- Odocoileus virginianus
- stocking rate
- forbs
- rotational grazing
- grazing intensity
- cattle
- Texas
- biomass
- seasonal variation
- botanical composition
- grasses
- feeding preferences
- Library Collection RecordShortgrass rangeland, dominated by blue grama (Bouteloua gracilis [H.B.K.] Lag. ex Steud), was grazed at 3 intensities, equivalent to mean stocking rates of 16.7, 23.0, and 36.5 heifer-days ha-1,…Publication Date 1998-07-01
- long term experiments
- ground cover
- liveweight gain
- stocking rate
- heifers
- sustainability
- grazing intensity
- biomass
- plant litter
- botanical composition
- Colorado
- Library Collection RecordBurning and harvest frequency can affect the vigor of switchgrass (Panicum virgatum L.), big bluestem (Andropogon gerardii Vitman), and indiangrass [Sorghastrum nutans (L.) Nash]. A field study was…Publication Date 1998-01-01
- Nebraska
- vigor
- Sorghastrum nutans
- Panicum virgatum
- weight
- harvesting frequency
- species differences
- prescribed burning
- Andropogon gerardii
- tillering
- tillers
- plant density
- biomass
- forage
- Library Collection RecordOld World bluestem (OWB; Bothriocloa spp.) are popular in the southern Great Plains but little is known about the relationships between forage characteristics and animal productivity. The influence…Publication Date 1998-07-01
- sown grasslands
- liveweight gain
- Bothriochloa ischaemum
- Bothriochloa bladhii
- body weight
- rain
- stocking rate
- Oklahoma
- steers
- biomass
- plant height
- Library Collection RecordIn this study the impact of a rotation grazing system on the soil and vegetation of a Stipa-Bouteloua-Agropyron community in the mixed prairie ecoregion was compared with the ungrazed treatment in…Publication Date 1997-11-01
- Elymus lanceolatus
- Hesperostipa comata
- Alberta
- rain
- chemical composition
- rotational grazing
- Bouteloua gracilis
- grazing intensity
- soil chemistry
- biomass
- range management
- plant litter
- botanical composition
- Library Collection RecordNative warm-season grass mixtures have been established on the Southern Plains under the USDA Conservation Reserve Program. We studied responses to N fertilizer on such pastures in western Oklahoma…Publication Date 1998-07-01
- Bouteloua curtipendula
- grassland improvement
- ground cover
- nitrogen fertilizers
- stocking rate
- Oklahoma
- Bouteloua gracilis
- grazing intensity
- application rates
- biomass
- range management
- botanical composition
- beef cattle
- forage
- Library Collection RecordMany studies have reported nitrogen (N) fertilization of rangeland, but few have reported changes in botanical composition, which may be as important as changes in forage production, or were…Publication Date 1998-07-01
- long term experiments
- grassland improvement
- cost-benefit analysis
- rain
- nitrogen fertilizers
- stocking rate
- forbs
- Pascopyrum smithii
- Bouteloua gracilis
- Wyoming
- application rates
- biomass
- botanical composition
- grasses
- Library Collection RecordWe compared the forage preferences of steers grazing among 8 varieties of grasses at 2 stages of phenology on the Northern Great Basin Experimental Range near Burns, Ore. Varieties included: '…Publication Date 1997-11-01
- Leymus cinereus
- Elymus lanceolatus
- density
- moisture content
- interspecific hybridization
- Pseudoroegneria spicata
- biting rates
- Psathyrostachys juncea
- mineral content
- Agropyron desertorum
- palatability
- fiber content
- leaf area index
- chemical composition
- selective grazing
- Oregon
- steers
- crude protein
- in vitro digestibility
- biomass
- phenology
- grazing
- feeding preferences
- plant height
- maturity stage
- Library Collection RecordStanding forage biomass (SFB) and the percent of standing biomass composed of forbs (PCTF) were modeled across the growing season. Samples representing stages of plant maturity from early vegetative…Publication Date 1998-03-01
- neural networks
- forks
- wavelengths
- radiometry
- mathematical models
- grasslands
- prediction
- cutting date
- prairies
- biomass
- canopy
- Library Collection RecordDegree-days required for standing crop and above-ground net primary production of northern wheatgrass (Agropyron dasystachyum [Hook.] Scribn., syn. Elymus lanceolatus [Scrib. &Smith] Gould) mowed…Publication Date 1998-01-01
- etiolated growth
- mowing
- Elymus lanceolatus
- heat sums
- harvest date
- etiolation
- ambient temperature
- Saskatchewan
- rain
- photosynthesis
- nitrogen content
- biomass
- grazing
- Library Collection RecordSeed production of big sagebrush (Artemisia tridentata Nutt.) plants established from containerized seedlings was compared to plants established by direct seeding. A garden of 'Hobble Creek…Publication Date 1997-11-01
- seed production
- container-grown plants
- root systems
- mortality
- Artemisia tridentata
- biomass
- Utah
- 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 RecordThe African perennial C4 grass Hyparrhenia rufa (Nees) Stapf has successfully invaded the lowland non-flooded savannas of Venezuela except in isolated sites with a shallow lithoplinthic hardpan. To…Publication Date 1997-05-01
- Venezuela
- Hyparrhenia rufa
- plant organs
- lithoplinthic hardpan
- soil depth
- pans
- soil fertility
- savannas
- invasion
- phosphorus
- soil chemistry
- nitrogen content
- biomass
- introduced species
- Library Collection RecordGrazing system and stocking rate effects on standing crop of species and relative species composition of tallgrass prairies in north-central Oklahoma were evaluated from 1989 to 1993. Twelve…Publication Date 1998-03-01
- continuous grazing
- rain
- stocking rate
- pastures
- forbs
- rotational grazing
- Oklahoma
- prairies
- biomass
- botanical composition
- grasses
- Library Collection RecordShrub height and crown diameter are useful non-destructive measures of shrub growth, but precise yields of aerial biomass require destructive methods which are unsatisfactory in studies on perennial…Publication Date 1998-05-01
- crown
- wood
- leaves
- volume determination
- Pakistan
- stems
- prediction
- Atriplex canescens
- diameter
- biomass
- plant height
- Library Collection RecordAlthough Thurber needlegrass (Stipa thurberiana Piper) is an important component of Palouse, sagebrush:steppe, and pine:forest rangelands, little is known of its qualitative and quantitative…Publication Date 1998-05-01
- harvest date
- Achnatherum thurberianum
- protein content
- fiber content
- regrowth
- Oregon
- biomass
- phenology
- seasonal variation
- nutritive value
- defoliation
- soil water
- Library Collection RecordRotation grazing strategies have been proposed to increase stocking capacity, improve animal gains, and improve forage production and range condition. We compared continuous or season-long, 4-pasture…Publication Date 1997-11-01
- optimization
- ground cover
- producer prices
- beef
- liveweight gain
- continuous grazing
- root systems
- rain
- stocking rate
- forbs
- rotational grazing
- steers
- Wyoming
- grazing intensity
- biomass
- plant litter
- botanical composition
- grasses
- 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 RecordDiffuse knapweed (Centaurea diffusa Lam.), an invasive weed, has reduced forage production and biodiversity, and increased soil erosion on over a million hectares of rangeland in the western United…Publication Date 1997-01-01
- Hesperostipa comata
- Centaurea diffusa
- wind
- Pseudoroegneria spicata
- sowing
- crop-weed competition
- ambient temperature
- invasion
- Agropyron cristatum
- rain
- Washington
- biomass
- range management
- defoliation
- Library Collection RecordTwenty two-year-old primiparous Angus X Hereford cows and their heifer calves were used to study effects of milk consumption on calf performance, suckling behavior, and forage intake. Ten cow-calf…Publication Date 1996-07-01
- restricted feeding
- sucklings
- physical activity
- calves
- body weight
- fiber content
- feeding behavior
- voluntary intake
- digestibility
- digesta
- Bouteloua gracilis
- nitrogen content
- biomass
- New Mexico
- beef cattle
- forage
- feed intake
- Library Collection RecordThe objectives of this study were to identify a Site Conservation Threshold, the point at which accelerated erosion occurs, and to examine the usefulness of the Water Erosion Prediction Project (WEPP…Publication Date 1996-05-01
- water erosion
- rill erosion
- ground cover
- semiarid grasslands
- highlands
- mathematical models
- loam soils
- clay soils
- range condition
- rain
- biomass
- sediment yield
- range management
- plant litter
- Arizona
- 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 RecordResearch has been lacking on the influence of honey mesquite (Prosopis glandulosa Torr.) on forage production in the Chihuahuan desert. In 1964 honey mesquite was controlled (65% kill) with the…Publication Date 1996-01-01
- xerophytes
- woody weeds
- Prosopis glandulosa
- cost-benefit analysis
- brush control
- rain
- forbs
- biomass
- range management
- botanical composition
- canopy
- grazing
- grasses
- New Mexico
- Library Collection RecordMost economic assessments of grasshopper damage are based on how much plant tissue insects consume or destroy without considering factors that influence the ability of individual plants and…Publication Date 1996-11-01
- Aulocara elliotti
- Cyperaceae
- timing
- ambient temperature
- rain
- forbs
- Bouteloua gracilis
- biomass
- seasonal variation
- insect pests
- defoliation
- New Mexico
- Library Collection RecordThe objective of this 2 year study was to identify the optimal height to graze Old World bluestem pasture in the Southern Great Plains under continuous stocking during the growing season. We…Publication Date 1996-11-01
- performance
- evaporation
- leaves
- roots
- stems
- liveweight gain
- continuous grazing
- ambient temperature
- Bothriochloa ischaemum
- rain
- steers
- crude protein
- grazing intensity
- Texas
- biomass
- forage
- plant height
- Library Collection RecordJapanese brome (Bromus japonicus Thunb.) has invaded many northern mixed-prairie plant communities. Understanding interactions of population dynamics of this and associated species is critical for…Publication Date 1997-01-01
- textural soil types
- Bromus japonicus
- stomatal conductance
- crop-weed competition
- rain
- seedlings
- soil water content
- Pascopyrum smithii
- xylem water potential
- tillers
- biomass
- water relations
- removal
- Montana
- Library Collection RecordLittle information is available comparing animal performance or stocking stability for different wheat (Triticum aestivum L.) cultivars. Wheat is annually planted on 10 million ha in the Southern…Publication Date 1996-03-01
- performance
- Triticum aestivum
- liveweight gain
- cultivars
- rain
- stocking rate
- steers
- Texas
- biomass
- seasonal variation
- grazing
- beef cattle
- forage
- 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 RecordConverting marginal hardwood forest to grassland has the potential of increasing economic output with livestock grazing. Nitrogen (N) management during conversion needs to be evaluated to minimize…Publication Date 1997-01-01
- oversowing
- woody weeds
- Quercus stellata
- Quercus marilandica
- tree trunk
- Festuca arundinacea
- shrublands
- leaves
- soil depth
- biogeochemical cycles
- tebuthiuron
- brush control
- Bothriochloa ischaemum
- rain
- branches
- Oklahoma
- soil chemistry
- nitrogen content
- biomass
- Library Collection RecordEstablishment of blue grama (Bouteloua gracilis [H.B.K.] Lag ex. Steud.) depends on adequate precipitation at critical times and on reduced competition from associated vegetation. These conditions…Publication Date 1995-11-01
- clones
- basal area
- vegetative propagation
- seedlings
- Bouteloua gracilis
- Wyoming
- biomass
- rangelands
- chemical constituents of plants
- Library Collection RecordThree annual applications of a factorial combination of N (0, 40, 80, 120 kg ha-1), P (0, 25 kg ha-1) and K (0, 100 kg ha-1) were applied to Florida flatwoods range where 45 plant species were…Publication Date 1996-11-01
- potassium fertilizers
- panicum oligosanthes
- Solidago
- Eupatorium
- solidage fistulosa
- euthamia minor
- stand density
- phosphorus fertilizers
- Schizachyrium scoparium
- species diversity
- ecological succession
- rain
- nitrogen fertilizers
- Florida
- forbs
- plant communities
- application rates
- biomass
- rangelands
- Library Collection RecordAlterations in shortgrass ecosystem structure and function following long-term use of atrazine [6-chloro-N-ethyl-N'-(1-methylethyl)-1,3, 5-triazine,2,4-diamine] for increased secondary…Publication Date 1995-07-01
- nonstructural carbohydrates
- soil bacteria
- sublethal effects
- hydroxyatrazine
- harvest date
- atrazine
- mineral content
- carbohydrates
- sandy loam soils
- Bouteloua gracilis
- nitrogen content
- application rates
- biomass
- grazing
- Library Collection RecordGrazing system and stocking rate effects on forage standing crop of tallgrass prairies in north-central Oklahoma were evaluated from 1989 to 1993. Twelve experimental units, consisting of pastures…Publication Date 1995-01-01
- air temperature
- rain
- stocking rate
- rotational grazing
- Oklahoma
- grazing intensity
- prairies
- biomass
- grasses
- forage