Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 101 - 150 of 352 results
- 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
- Library Collection RecordThe valuable role that healthy riparian ecosystems play in regional diversity of plant and wildlife communities is just beginning to be recognized. Resource managers need to know how degraded…Publication Date 1990-07-01
- Poa palustris
- plant community analysis
- Salix
- population density
- Poa pratensis
- riparian buffers
- pastures
- regrowth
- mountain grasslands
- cattle
- grazing
- Colorado
- Library Collection RecordSpotted knapweed is the most serious range weed problem in western Montana. Although picloram is often used to control knapweed, the economic feasibility of the practice has not been evaluated. We…Publication Date 1991-01-01
- feasibility studies
- mathematical models
- cost-benefit analysis
- weed control
- chemical control
- pastures
- picloram
- Centaurea maculosa
- range management
- Montana
- forage
- Library Collection RecordHarvesting trees for firewood in the oak hardwood rangelands of the western Sierra Nevada foothills creates slash that may be burned to improve livestock forage production or piled into brushpiles…Publication Date 1991-03-01
- economic analysis
- habitats
- hunting
- Quercus
- multiple land use
- fuelwood
- Callipepla californica
- brushwood
- slash
- pastures
- California
- cattle
- wildlife management
- range management
- rangelands
- grazing
- forage
- Library Collection RecordComponents of the organic matter were studied in soil under 3 Mixed Prarie types: grassland dominated by needle-and-thread/blue grama (Stipa comata Trin. and Rupr./Bouteloua gracilis (HBK.) Lag. ex…Publication Date 1990-09-01
- grassland soils
- soil organic matter
- tillage
- monosaccharides
- organic acids and salts
- soil quality
- transformation
- physicochemical properties
- chernozemic soils
- mixed pastures
- Hesperostipa comata
- Alberta
- pastures
- Bouteloua gracilis
- prairies
- grazing
- Library Collection RecordThe effects of grazing on relative (g g-1 d-1) and absolute (g m-2 d-1) aboveground net primary productivity and senescence of coirón blanco (Festuca pallescens (St. Yves) Parodi) were investigated…Publication Date 1990-07-01
- interactions
- senescence
- reproduction
- vegetative growth
- Festuca
- simulation models
- pastures
- regrowth
- semiarid zones
- biomass accumulation
- phenology
- Argentina
- grazing
- Library Collection RecordJustification for controlling honey mesquite (Prosopis glandulosa Torr. var. glandulosa) on rangelands has been traditionally related to enhanced livestock production from increased herbage…Publication Date 1991-03-01
- net primary production
- water yield
- Bouteloua curtipendula
- Nassella leucotricha
- Prosopis glandulosa var. glandulosa
- brush control
- leaf area index
- pastures
- vegetation
- growth rate
- biomass production
- Texas
- range management
- forage
- Library Collection RecordHeavy communal grazing pressure and rapid phytomass decomposition reduce shrub interspace cover in Somalia from 100% at the end of the growing season to 5% at the end of the dormant season. Intense…Publication Date 1990-11-01
- communal feeding
- interrill erosion
- hydrology
- watershed management
- ground cover
- watersheds
- Somalia
- sandy soils
- clay soils
- pastures
- grazing intensity
- shrubs
- plant litter
- rangelands
- livestock
- grazing
- infiltration
- Library Collection RecordIt is common in range science to base stocking rate estimates on range sites as units of forage production. However, little is known about how diet composition, quality, and intake may differ by…Publication Date 1990-03-01
- availability
- grazing pressure
- clay loam soils
- nutrient intake
- site factors
- pastures
- sandy loam soils
- heifers
- diets
- grazing behavior
- in vitro digestibility
- botanical composition
- nutritive value
- forage
- Library Collection RecordThe key to managing Arizona chaparral depends on creating and maintaining brush-free or savanna-like habitats. Brush control using fire, chemicals, and mechanical methods has been tested previously;…Publication Date 1991-03-01
- chaparral
- chaparral soils
- Quercus turbinella
- manual weed control
- soil density
- biological control
- controlled grazing
- brush control
- soil fertility
- stocking rate
- vegetation
- regrowth
- grazing intensity
- goats
- range management
- browsing
- grazing
- Arizona
- Library Collection RecordHerbage biomass for blue grama (Bouteloua gracilis [H.B.K. Lag]), pinyon ricegrass (Piptochaetium fimbriatum [H.B.K.] Hitche.), New Mexico muhly (Muhlenbergia pauciflora Buckl.), other grasses and…Publication Date 1990-09-01
- mixed forests
- muhlenbergia pauciflora
- piptochaetium fimbriatum
- light penetration
- Muhlenbergia
- Juniperus monosperma
- silvopastoral systems
- forest ecology
- pinyon-juniper
- Pinus edulis
- understory
- pastures
- Poaceae
- Bouteloua gracilis
- biomass
- canopy
- New Mexico
- forage
- Library Collection RecordLittle information is available on goat nutrition and diet selection on shrub-dominated ranges. This study examined the botanical and nutritive composition of Angora and Spanish goat diets, and…Publication Date 1990-03-01
- alfalfa
- alfalfa hay
- digestible energy
- Quercus havardii
- fiber content
- pastures
- tannins
- hay
- crude protein
- feed supplements
- diets
- goats
- in vitro digestibility
- Texas
- botanical composition
- nutritive value
- forage
- feed intake
- Library Collection RecordA 4-year study was conducted on Cross Timbers range in north-central Oklahoma. Conventional seasonlong grazing (SLS) of stocker cattle was compared to intensive-early season stocking (IES). Stocking…Publication Date 1990-03-01
- forests
- liveweight gain
- stocking rate
- pastures
- vegetation
- Oklahoma
- prairies
- defoliation
- grazing
- beef cattle
- 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 RecordEmergence of broadcast-seeded kleingrass (Panicum coloratum L. 'Selection 75') was compared for 2 seasons in short-duration grazed (SDG) areas and ungrazed exclosures in the Texas Rolling…Publication Date 1990-03-01
- soil strength
- Panicum coloratum
- controlled grazing
- seedling emergence
- stocking rate
- pastures
- cattle
- Texas
- soil compaction
- trampling
- Library Collection RecordShort-duration grazing (SDG) has been purported to increase forage production and utilization compared to other grazing systems, and thus can sustain higher stocking rates. This study was designed to…Publication Date 1990-03-01
- availability
- stocking rate
- pastures
- cattle
- plant density
- Texas
- botanical composition
- grazing
- forage
- Library Collection RecordCombined grazing by black-tailed prairie dogs (Cynomys ludovicianus) and bison (Bison) produces and maintains a series of changes in the vegetation of prairie dog colonies. However, because their…Publication Date 1991-03-01
- grazing time
- Cynomys ludovicianus
- mixed pastures
- bison
- controlled grazing
- South Dakota
- vegetation
- grazing intensity
- nitrogen content
- prairies
- biomass
- range management
- botanical composition
- grazing
- Library Collection RecordManagers often deal with the problem of herd replacement of one animal class by another. A preliminary study suggested that steers could be substituted for cow-calf pairs on shortgrass steppe on a…Publication Date 1989-07-01
- animal unit equivalent
- substitution
- conversion
- cows
- sown grasslands
- ratios
- calves
- steppes
- stocking rate
- pastures
- steers
- natural grasslands
- range management
- Colorado
- forage
- feed intake
- Library Collection RecordBurning on good to excellent condition tallgrass prairie in central Oklahoma yielded results which visually appeared much greater than would be expected from previous burning research. Therefore, a…Publication Date 1989-01-01
- liveweight gain
- fires
- fire effects
- pastures
- prescribed burning
- Oklahoma
- crude protein
- diet studies
- cattle
- in vitro digestibility
- range management
- grazing
- Library Collection RecordAtrazine [6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine] can be used to modify species composition of naturally subirrigated Sandhills meadows. The potential for ground water…Publication Date 1988-09-01
- groundwater contamination
- dispersion
- herbicide residues
- physicochemical properties
- atrazine
- herbicides
- Nebraska
- runoff
- vegetation
- kinetics
- range management
- Library Collection RecordThe effect of varying price ratios between liveweight and supplementary feed on the optimum stocking rate (SR) of a beef herd on range is analyzed in relation to the net value of weaned calf live…Publication Date 1989-07-01
- mathematical models
- production costs
- cost analysis
- beef herds
- liveweight gain
- stocking rate
- pastures
- dietary supplements
- cattle feeding
- beef cattle
- Library Collection RecordForty-six clonal lines of a hybrid cross between Pseudoroegneria spicata [Pursh.] Scribn. and Smith × Elytrigia repens [L.] Beauv. were used to evaluate the influence of various chemical and…Publication Date 1989-01-01
- trials
- forage crops
- hybrids
- plant morphology
- pastures
- cattle
- in vitro digestibility
- phenology
- Montana
- grazing
- grasses
- feeding preferences
- chemical constituents of plants
- Library Collection RecordWe discuss what concepts or models should be used to organize research and management on rangelands. The traditional range succession model is associated with the management objective of achieving an…Publication Date 1989-07-01
- ecological balance
- equilibrium
- ecosystems
- simulation models
- climax communities
- ecological succession
- pastures
- grazing intensity
- range management
- grazing
- Library Collection RecordPlant community and soil development were investigated on oil/gas drilling sites occupying both sagebrush and coniferous forest vegetation types in northwestern Wyoming. Sites ranged from 3 to 33…Publication Date 1988-09-01
- oil and gas wells
- coniferous forests
- soil analysis
- plant development
- disturbed soils
- plant community analysis
- reclamation
- ecological succession
- environmental impact reporting
- vegetation
- woody plants
- Wyoming
- rangelands
- Library Collection RecordAir temperature or growing degree-days (GDD) are known to influence morphological development of grass, but the effects of grazing history on grass morphological development has not been established…Publication Date 1989-05-01
- flora
- wild plants
- Koeleria
- Koeleria pyramidata
- Great Plains region
- heat sums
- Hesperostipa comata
- developmental stages
- Nassella viridula
- plant morphology
- air temperature
- pastures
- Poaceae
- Pascopyrum smithii
- Bouteloua gracilis
- growth rate
- grazing
- Library Collection RecordGrazing was eliminated from the Appleton-Whittell Research Ranch Sanctuary, located in south-central Arizona, in 1968. Long-term changes in canopy cover of vegetation were evaluated between 1969 and…Publication Date 1989-07-01
- recovery
- ecosystems
- pastures
- grazing intensity
- plant communities
- semiarid zones
- botanical composition
- grazing
- Arizona
- Library Collection RecordResearch was conducted on the effects of rotational grazing (RG) compared to continuous grazing (CG) on the behavior of cattle grazing on rangelands. Different livestock densities in the RG…Publication Date 1989-07-01
- grazing time
- continuous grazing
- grazing experiments
- stocking rate
- pastures
- rotational grazing
- grazing intensity
- grazing behavior
- spatial distribution
- cattle
- Texas
- Library Collection RecordResearch was initiated at the Texas Experimental Ranch in 1981 to quantify the effects of 2 livestock densities on forage quality in a rotational grazing (RG) treatment. Livestock densities evaluated…Publication Date 1987-07-01
- stocking rate
- pastures
- rotational grazing
- digestibility
- crude protein
- Texas
- quality
- livestock
- forage
- dry matter
- Library Collection RecordA lightweight quadrat frame for backcountry vegetation sampling is described. The frames are constructed of aluminum and disassemble for easy packing. The cost per frame is about $15. This material…Publication Date 1988-07-01
- backpacking
- frames
- equipment
- vegetation
- sampling
- rangelands
- Library Collection RecordThe objective of this research was to determine the effects of selected vegetation, soil, rock, and slope variables on infiltration of semiarid rangelands with slope gradients ranging from 0-70%.…Publication Date 1988-05-01
- rocks
- correlation
- semiarid soils
- rangeland soils
- soil depth
- hydrology
- vegetation
- slopes
- range management
- infiltration
- New Mexico
- soil water
- Library Collection RecordProbabilities of detecting frequency differences based on data obtained by random sampling were determined by computer simulation. Artificial, monotypic populations of known frequency were generated…Publication Date 1987-09-01
- hypothesis testing
- probability analysis
- frequency distribution
- computer simulation
- vegetation
- sampling
- botanical composition
- rangelands
- 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 RecordCalculated reflectance factors and vegetation indices derived from radiometric reflectance measurements were used in regression analyses to test for a single relationship between canopy reflectance…Publication Date 1987-07-01
- reflectance
- radiometry
- remote sensing
- Agropyron desertorum
- leaf area index
- pastures
- vegetation
- rangelands
- canopy
- dry matter
- North Dakota
- Library Collection RecordMost arid and semiarid rangeland plants form a mycorrhizal symbiosis with certain fungi through which the host plants absorb water and nutrients from the soil. Small mammals are known to disperse…Publication Date 1988-07-01
- mycorrhizal fungi
- spore dispersal
- symbiosis
- arid zones
- wildlife
- ecological succession
- vegetation
- mammals
- Oregon
- semiarid zones
- rangelands
- Library Collection RecordMarginal farmlands seeded to grasses in the Southern Great Plains usually have been depleted in N by cropping, cultivation, and erosion. This study measured soil N accumulation over 20 to 22 years in…Publication Date 1988-01-01
- marginal land
- soil analysis
- Sporobolus cryptandrus
- grassland soils
- Eragrostis curvula
- fertilizer application
- Bothriochloa bladhii
- nitrogen fertilizers
- old field soils
- pastures
- Oklahoma
- nitrogen content
- grazing
- Library Collection RecordA 16-paddock, cell-designed, rotational grazing (RG) system was initiated in March 1981 to evaluate the effects of RG on various vegetation response variables and cow/calf production. This 20-month…Publication Date 1987-07-01
- organic matter digestibility
- crop quality
- continuous grazing
- stocking rate
- pastures
- rotational grazing
- digestibility
- crude protein
- cattle
- Texas
- plant litter
- forage
- Library Collection RecordSoil ingestion ratios were estimated for 2 primary herbivore species utilizing a sagebrush ecosystem in southeastern Idaho to determine the relative importance of soil and vegetation pathways in…Publication Date 1988-03-01
- Idaho
- vegetation
- Lepus
- ingestion toxicity
- Antilocapra americana
- soil ingestion
- trace elements
- pollution
- Library Collection RecordChanges in vegetation under yearlong grazing were compared with those under the Santa Rita grazing system, a rotation system designed for southwestern US rangelands where 90% of the forage is…Publication Date 1988-07-01
- yield response functions
- grasslands
- vegetation
- rotational grazing
- semiarid zones
- plant density
- range management
- grazing
- Arizona
- Library Collection RecordTrends in canopy-coverage of vegetation and bare ground were measured inside and outside exclosures on recent burns within three-pasture rest-rotation and season-long grazing systems over a 10-year…Publication Date 1987-09-01
- ground cover
- ecological succession
- vegetation
- cattle
- Montana
- grazing
- Library Collection RecordTraditional methods of monitoring brush canopies such as ground survey and aerial photography are not cost effective for large areas. This experiment compared photo-estimated brush canopy closure to…Publication Date 1986-05-01
- brushwood and scrub
- multispectral scanning system
- Landsat
- biomass determination
- remote sensing
- brush control
- indexes
- vegetation
- Texas
- rangelands
- canopy
- Library Collection RecordDefoliation of intermediate wheatgrass (Agropyron intermedium by cattle was examined under seasonal and short-duration grazing. Tiller height, number of green leaves per tiller, phenological status,…Publication Date 1987-05-01
- grazing time
- Elytrigia intermedia subsp. intermedia
- stocking rate
- Washington
- pastures
- rotational grazing
- tillering
- grazing behavior
- cattle
- defoliation
- Library Collection RecordWe investigated effects of fall burning of gulf cordgrass (Spartina spartinae) rangeland on winter diets and liveweight gains of cattle on the Texas Coastal Prairie during 1979-1981. Gulf cordgrass…Publication Date 1986-05-01
- crude protein
- spartina spartinae
- autumn
- Nassella leucotricha
- liveweight gain
- grazing trials
- pastures
- prescribed burning
- digestibility
- diets
- cattle
- Texas
- forage
- feeding preferences