Rangeland Ecology & Management
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Displaying 101 - 150 of 953 results
- Library Collection RecordSome recent investigations have shown the visual obstruction (VO) measurement method to be an effective means of estimating herbage standing crop non-destructively in tallgrass prairie. Although the…Publication Date 2002-09-01
- tallgrass prairie
- mixed prairie
- rapid methods
- visual obstruction
- Buchloe dactyloides
- estimation
- shortgrass prairie
- Bouteloua gracilis
- grazing intensity
- Texas
- prairies
- biomass
- mixed prairie
- non-destructive sampling
- Robel pole
- shortgrass
- tallgrass
- Library Collection RecordAccurate and efficient monitoring of habitat structure on rangelands is important for understanding wildlife responses to land management practices. Unfortunately, studies of wildlife responses to…Publication Date 2002-09-01
- stand structure
- shrublands
- visual obstruction
- Artemisia filifolia
- dimensions
- angle of obstruction
- cone of vulnerability
- habitat structure
- landscape ecology
- habitats
- understory
- Quercus havardii
- Oklahoma
- plant density
- Texas
- canopy
- cone of vulnerability
- gallinaceous bird
- sand shinnery
- vegetation structure
- visual obstruction
- patchiness
- heterogeneity
- Library Collection RecordThe objectives of this study were to investigate the use of near infrared spectroscopy (NIRS) of fecal samples for predicting the percentage of mountain big sagebrush (Artemisia tridentata Nutt. ssp…Publication Date 2002-07-01
- hear infrared reflectance spectroscopy
- laboratory techniques
- rapid methods
- reflectance
- accuracy
- calibration
- validity
- feces composition
- selective grazing
- infrared spectroscopy
- Artemisia tridentata
- diets
- sheep
- Artemisia
- diet selection
- sagebrush
- sheep
- Library Collection RecordIn this paper, the linkage between streamflow and shrub cover on rangelands is examined, with a focus on the extensive Texas rangelands dominated by mesquite and juniper. The conclusions drawn are…Publication Date 2002-07-01
- semiarid soils
- stream flow
- subsurface flow
- groundwater flow
- water yield
- Prosopis
- evapotranspiration
- watersheds
- brush control
- watershed hydrology
- runoff
- precipitation
- Texas
- range management
- Juniperus
- water yield
- range hydrology
- runoff
- shrub control
- ecohydrology
- stream flow
- semiarid
- Library Collection RecordHalogeton [Halogeton glomeratus (Bieb.) C. A. Mey], is a fleshy, annual, herbaceous species that was accidentally introduced into the western U.S. during the 20th century. Because it is highly…Publication Date 2002-05-01
- interspecific competition
- salt tolerance
- deserts
- Halogeton glomeratus
- controlled grazing
- poisonous weeds
- Agropyron desertorum
- invasion
- Krascheninnikovia lanata
- sheep
- range management
- introduced species
- plant competition
- Salt desert
- poisonous plants
- plant ecology
- Library Collection RecordSnakeweeds (broom, Gutierrezia sarothrae (Pursh) Britt Rusby); and threadleaf, G. microcephala (DC.) Gray) fall into that class of poisonous weeds that seldom cause direct livestock losses because…Publication Date 2002-05-01
- adverse effects
- Gutierrezia
- rats
- rabbits
- gutierrezia microcephala
- carrying capacity
- poisonous weeds
- range condition
- palatability
- herbicides
- weed control
- Gutierrezia sarothrae
- prescribed burning
- plant communities
- sheep
- cattle
- range management
- plant competition
- New Mexico
- poisonous plants
- range weed
- livestock grazing
- broom snakeweed (Gutierrezia sarothrae (Pursh) Britt & Rusby)
- threadleaf snakeweed (Gutierrezia microcephala DC.) Gray)
- Library Collection RecordIn recent years livestock death losses from poisonous plants in the western United States have averaged about 2-3% annually. A review of 36 grazing studies in North America shows poisonous plant…Publication Date 2002-05-01
- Oxytropis
- deserts
- avoidance conditioning
- Oxytropis sericea
- controlled grazing
- poisonous weeds
- woodland grasslands
- Western United States
- grasslands
- continuous grazing
- stocking rate
- range management
- livestock
- Delphinium
- cattle
- sheep
- goats
- grazing
- poisonous plants
- economics
- Library Collection RecordIn 1992 and 1993, pastures of WW-Spar Old World bluestem (Bothriochloa ischaemum L.) were maintained at 2 levels of soil water, rainfall and rainfall plus 25 mm/week of supplementary irrigation. At…Publication Date 2002-05-01
- irrigated conditions
- irrigated pastures
- leaves
- ratios
- stems
- continuous grazing
- Bothriochloa ischaemum
- rain
- leaf area index
- steers
- tillering
- grazing intensity
- plant density
- Texas
- biomass
- plant height
- soil water
- Bothriochloa ischaemum
- continuous variable stocking
- herbage allowance
- Library Collection RecordPhreatophytes are trees and shrubs with deep roots tapping the water tables. As such they are presumed to be able to tolerate a water deficit in the top soil. Growth of some phreatophytes is…Publication Date 2002-01-01
- Tamarix gallica
- weed biology
- diurnal variation
- stomatal conductance
- drought tolerance
- carbon dioxide
- root systems
- photosynthesis
- gas exchange
- precipitation
- xylem water potential
- semiarid zones
- Texas
- introduced species
- phreatophytes
- water relations
- gas exchange
- drought tolerance
- Tamarix gallica L.
- Library Collection RecordGrazers ingest seeds of invasive forbs and may contribute to their spread by depositing viable seeds in uninfested areas. Some mature seed pass through the gastrointestinal (GI) tract of ruminants,…Publication Date 2002-01-01
- sheep dung
- seed development
- seed dispersal
- viability
- Euphorbia esula
- invasion
- weed control
- seeds
- transit time
- sheep
- rumen fermentation
- seed germination
- Montana
- grazing
- maturity stage
- weed
- Euphorbia esula
- rumen
- sheep
- Library Collection RecordThis study identifies the characteristics and attitudes of public land ranchers. Data from a random survey of 2,000 U.S. Forest Service and Bureau of Land Management grazing permittees (53.5%…Publication Date 2002-01-01
- socioeconomic status
- cultural values
- intensification
- ranges
- farm income
- grazing tenancy
- livestock numbers
- management
- farm size
- public domain
- ranching
- farmers' attitudes
- Western United States
- demography
- grazing intensity
- sheep
- beef cattle
- grazing fees
- grazing reduction
- grazing season
- public land property
- Library Collection RecordAcross nearly 100 sampling locations widely distributed within the arid shrubland of Western Australia, we demonstrated a general relationship between landscape function, primary productivity and…Publication Date 2002
- landscape function
- resilience
- Landscape degradation
- primary productivity
- indicators
- patch
- patch-mosaic
- ecosystem ecology
- plant production
- rainfall
- grazing
- sheep
- degradation
- Africa
- Library Collection RecordThis paper describes the progress towards developing a practical and cost effective alternative to the water trough currently used in extensive sheep operations. Though functional, troughs are not…Publication Date 2002
- water
- sheep
- rangelands
- Pests
- biodiversity
- Western Australia
- Library Collection RecordGeographic Information Systems (GIS) offer tools for examining grazing patterns in greater detail than previously. While general patterns such as patch grazing are documented in Mitchell grasslands…Publication Date 2002
- grazing management
- paddocks
- grasslands
- sheep
- soil
- pastures
- GIS
- geographic information systems
- Queensland
- Utilisation
- Library Collection RecordMonitoring in rangelands needs to be conducted over prolonged time periods to discriminate changes due to grazing management from that due to the long term rainfall variation that is so…Publication Date 2002
- monitoring
- rangelands
- grazing management
- rainfall
- sheep
- grasslands
- plant density
- Northwest Queensland
- Library Collection RecordThe Rangelands archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from…Publication Date 2001-12-01
- demonstration farms
- efficacy
- pricklypear
- Prosopis glandulosa
- application methods
- technology transfer
- agricultural education
- brush control
- Juniperus
- costs and returns
- Texas
- rangelands
- range management
- weed control
- Library Collection RecordExcessive cover of juniper (Juniperus pinchotii Sudw.) reduces forage production, interferes with livestock management, and diminishes the watershed and wildlife habitat values of rangelands. We…Publication Date 2001-11-01
- basal area
- Juniperus pinchotii
- Bouteloua curtipendula
- Buchloe dactyloides
- Hilaria mutica
- soil temperature
- Prosopis glandulosa
- soil fertility
- invasion
- weed control
- seedlings
- growth rate
- Texas
- botanical composition
- plant competition
- canopy
- plant height
- competition
- facilitation
- mesquite rangeland
- seedling establishment
- Library Collection RecordPods and seeds from carob Ceratonia siliqua L. trees growing in Ajloun Mountainous forests and rangelands in Jordan were analyzed for their proximate analysis, Ca and P contents, and also the effects…Publication Date 2001-11-01
- interactions
- pods
- Ceratonia siliqua
- Jordan
- ash
- mineral content
- seed dispersal
- carbohydrates
- fiber content
- seeds
- phosphorus
- calcium
- crude protein
- feed supplements
- sheep
- goats
- seed germination
- germination
- fiber
- forest
- goat
- Jordan
- protein
- sheep
- Library Collection RecordChanging landowner demographics and the increasing recognition that some quantity of woody plants is valuable for certain rangeland management objectives has led to increasing interest in selective…Publication Date 2001-11-01
- control methods
- innovation adoption
- U.S. Cooperative Extension Service
- extension agents
- information dissemination
- extension education
- Juniperus ashei
- geographical variation
- Opuntia
- Juniperus pinchotii
- Prosopis glandulosa
- landowners
- brush control
- herbicides
- weed control
- chemical control
- Texas
- agency and industry partnership
- brush management
- collaborative marketing
- information dissemination
- technology adoption
- Library Collection RecordKnowledge of the rate woody plant canopy cover increases is essential for understanding the ecology of rangeland plant communities, determining the economic feasibility of brush management practices…Publication Date 2001-09-01
- aerial photography
- chaining
- grubbing
- Juniperus pinchotii
- carrying capacity
- soil types
- brush control
- rain
- biomass production
- grazing intensity
- Texas
- canopy
- forage
- Juniperus pinchotii
- mechanical brush control
- aerial photography
- line transects
- juniper management
- herbage production
- Library Collection RecordThis paper presents a comparative simulation analysis of the economics of prescribed fire and aerially applied root-killing herbicide treatment as methods for maintaining livestock productivity on…Publication Date 2001-09-01
- livestock numbers
- carrying capacity
- Prosopis glandulosa
- cost analysis
- cost-benefit analysis
- brush control
- herbicides
- chemical control
- prescribed burning
- Texas
- wildlife management
- grazing
- brush management
- bioeconomics
- natural resource accounting
- prescribed burning
- root-killing herbicide
- Library Collection RecordLeafy spurge (Euphorbia esula L.), a widely established exotic, noxious, perennial weed, is a major threat to rangeland and wildland in the Upper Great Plains. A deterministic, bioeconomic model,…Publication Date 2001-07-01
- fencing
- simulation models
- costs and returns
- Euphorbia esula
- economic analysis
- weed control
- profitability
- sheep
- rangelands
- grazing
- grasses
- feed intake
- Euphorbia esula L.
- grazing
- economics
- Library Collection RecordA classification of dietary structural types that represents different arrangements of forage classes is proposed. It may be especially useful for interpreting and comparing herbivore diets from…Publication Date 2001-07-01
- Lama guanicoe
- feces composition
- pastures
- selective grazing
- species differences
- vegetation
- feeds
- digestibility
- sheep
- goats
- cattle
- seasonal variation
- Argentina
- botanical composition
- forage
- diet botanical composition
- conceptualization
- forage classes
- microhistological analysis
- multivariate analysis
- similarity of diets
- Library Collection RecordPopulations of an introduced woody weed, prickly acacia (Acacia nilotica (L.) Delile ssp. indica (Benth.) Brenan syn. Acacia arabica (Lam.) Willd. ssp. indica Benth.), were surveyed at 4 sites in…Publication Date 2001-07-01
- regeneration
- Weeds
- quarantine
- Queensland
- seed dispersal
- highlands
- rain
- seedlings
- pastures
- selective grazing
- woody plants
- rotational grazing
- sheep
- plant density
- introduced species
- browsing
- grazing
- plant height
- Life-stage profiles
- rainfall
- population dynamics
- regeneration
- cattle
- woody weeds
- Library Collection RecordSome grasses harbor endophytic fungi living in intercellular spaces in the leaves, stems and reproductive organs. The fungi can dramatically affect the physiology and ecology of plants. For example,…Publication Date 2001-07-01
- Elymus canadensis
- mutualism
- colonization
- host plants
- Iowa
- plant physiology
- toxins
- plant-water relations
- leaves
- Illinois
- Missouri
- stems
- Kansas
- plant ecology
- incidence
- Nebraska
- herbivores
- Oklahoma
- tillers
- Texas
- prairies
- geographical distribution
- Acremonium
- endophytes
- Elymus canadensis
- Epichlo typhina
- Neotyphodium
- geographical pattern
- mutualism
- tallgrass prairie
- Library Collection RecordGoats consume juniper, but toxic terpenoids within the plant limit intake. Our objective was to determine if dosing goats with the adsorptive compound activated charcoal would increase juniper…Publication Date 2001-05-01
- Juniperus ashei
- charcoal
- Juniperus pinchotii
- browse
- adaptation
- terpenoids
- goats
- Texas
- forage
- feed intake
- feeding preferences
- Juniperus
- J. ashei
- J. pinchotii
- Capra
- experience
- preference
- toxicosis
- feedback
- aversions
- browsing
- Library Collection RecordRedberry juniper (Juniperus pinchotii Sudw.) is a noxious shrub or small tree that invades rangelands in northwest Texas. Field reflectance measurements showed that redberry juniper had lower visible…Publication Date 2001-05-01
- infrared radiation
- detection
- color
- aerial photography
- Weeds
- reflectance
- Juniperus pinchotii
- Infestation
- remote sensing
- shrubs
- plant density
- Texas
- botanical composition
- color-infrared photography
- reflectance
- digital image anaysis
- accuracy assessment
- Juniperus
- Library Collection RecordIt is necessary to quantify rates of woody plant encroachment on southwestern USA rangelands to determine the economic feasibility of treatments designed to manage these plants. This study observed…Publication Date 2001-03-01
- area
- plowing
- root plowing
- woody weeds
- ground cover
- Prosopis glandulosa
- brush control
- precipitation
- spatial distribution
- Texas
- canopy
- honey mesquite
- Prosopis
- density
- shrub encroachment
- aerial photography
- image analysis
- Library Collection RecordPlacing basins in rangeland seedbeds to capture rainfall has enhanced seeded grass establishment, but it has not been practical on debris-littered land following rootplowing for brush control. A disk…Publication Date 2001-03-01
- disc cultivators
- chain diking
- disk chaining
- chains
- Panicum coloratum
- sowing
- seedbed preparation
- grassland improvement
- Prosopis glandulosa
- brush control
- Bothriochloa ischaemum
- precipitation
- plant density
- Texas
- seedbeds
- rangeland seeding
- brush control
- honey mesquite
- Prosopis glandulosa
- Library Collection RecordTwo grazing trials were conducted during early winter (December 1996-January 1997) and spring (April-May 1997) to evaluate the effect of shape of pasture on forage use and behavior of grazing sheep (…Publication Date 2001-03-01
- Italy
- chemical composition
- pastures
- winter
- animal behavior
- spring
- feeding behavior
- voluntary intake
- Mediterranean climate
- selective grazing
- use efficiency
- sward destruction
- shape
- protein intake
- energy intake
- grazing intensity
- sheep
- biomass
- forage
- dry matter
- diet choice
- space pattern
- grazing management
- Library Collection RecordThe decade of the 1920s was somewhat of a paradox for range science. A. W. Sampson published 3 books that were widely used as text for higher education classes in range management. The United States…Publication Date 2001-03-01
- social change
- textbooks
- salt licks
- grazing tenancy
- USDA
- public domain
- history
- water supply
- prescribed burning
- sheep
- goats
- overgrazing
- range management
- grazing
- herding technology
- range text
- wildfire
- salting
- Library Collection RecordWoody cover, when expressed at the scale of the 207 km2 Cusenbary Draw basin, remained unchanged (approximately 23%) from 1955 to 1990. When expressed at the scale of range sites, woody cover…Publication Date 2001-03-01
- soil depth
- water yield
- water balance
- multiple use
- landscapes
- watershed management
- evapotranspiration
- Prosopis glandulosa
- brush control
- runoff
- woody plants
- precipitation
- spatial distribution
- Texas
- range management
- botanical composition
- Juniperus
- rangelands
- brush management
- evapotranspiration
- GIS and remote sensing
- hydrologic modeling
- semiarid rangelands
- Library Collection RecordThe Rangelands archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from…Publication Date 2001-02-01
- Spain
- sheep
- sheep farming
- Library Collection RecordLittle information is available about seasonal application and carry-over effects of biosolids application to semi-arid grasslands. Biosolids rates of 0 (control), 7, 18, or 34 Mg ha-1 were topically…Publication Date 2001-01-01
- irrigated conditions
- sewage sludge
- waste disposal
- land application
- timing
- grassland improvement
- Hilaria mutica
- mineral content
- semiarid grasslands
- rain
- nitrogen content
- application rates
- Texas
- crop yield
- Hilaria mutica
- Chihuahuan desert grassland
- biosolids surface-application
- biosolids land-application
- irrigation
- standing crop
- forage quality
- carry-over effects
- Library Collection RecordAssessment of herbaceous standing crop in heterogeneous range plant communities requires large numbers of samples to account for inherent variability. The dry-weight-rank method (DWR) was developed…Publication Date 2001-01-01
- mixed prairie
- ranking
- rapid methods
- Juniperus pinchotii
- Prosopis glandulosa
- stand characteristics
- estimation
- sampling
- Texas
- prairies
- biomass
- botanical composition
- dry matter
- botanical composition
- estimation
- landscapes
- standing crop proportion
- Library Collection RecordSpotted knapweed (Centaurea maculosa Lam.), an Eurasian perennial forb, is replacing many native perennial grasses, such as Idaho fescue (Festuca idahoensis Elmer.), throughout the Northern Rocky…Publication Date 2001-01-01
- noxious substances
- cnicin
- Festuca idahoensis
- weed palatability
- leaves
- canopy gaps
- stems
- ambient temperature
- weed control
- fiber content
- rain
- selective grazing
- crude protein
- sheep
- in vitro digestibility
- Centaurea maculosa
- seasonal variation
- introduced species
- invasive species
- nutritive value
- feeding preferences
- plant height
- weed
- Centaurea maculosa
- Festuca idahoensis
- utilization
- nutritive value
- Library Collection RecordThe Rangelands archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from…Publication Date 2000-10-01
- cost analysis
- Juniperus
- Texas
- prescribed burning
- Library Collection RecordThe Ecological Index Method impacted directly on the estimation of grazing capacities in the Karoo, an arid region in South Africa. Due to inherent deficiencies in the ecological index method, index…Publication Date 2000-09-01
- Limax
- pioneer species
- agronomic traits
- arid grasslands
- carrying capacity
- nutrient requirements
- climax communities
- South Africa
- veld
- estimation
- digestibility
- sheep
- range management
- botanical composition
- nutritive value
- canopy
- grasses
- available dry matter production
- canopy spread cover
- current grazing capability
- [K divided by (Ca + Mg)
- total digestible nutrients
- Library Collection RecordRunoff hydrographs from 3 separate rainfall simulation runs at 11 different shortgrass prairie sites were evaluated to determine the hydrologic similarity within a single ecosystem at widely…Publication Date 2000-07-01
- loam soils
- clay soils
- steppe soils
- range condition
- rain
- South Dakota
- runoff
- sandy loam soils
- rainfall simulators
- Texas
- prairies
- biomass
- plant litter
- rangelands
- canopy
- New Mexico
- Colorado
- runoff
- rainfall simulation
- hydrograph
- time-to-peak
- Library Collection RecordWe evaluated the influence of supplemental barley and activated charcoal on the intake of sagebrush by lambs in individual pens. In 3 experiments, lambs were fed sagebrush (harvested and chopped to 2…Publication Date 2000-07-01
- alfalfa pellets
- artemisia tridentata subsp. vaseyana
- activated carbon
- chop length
- artemisia tridentata subsp. tridentata
- provenance
- lambs
- selective grazing
- energy intake
- terpenoids
- barley
- feed supplements
- Artemisia tridentata
- feed intake
- feeding preferences
- zero grazing
- sheep
- macronutrients
- terpenoids
- rangelands
- Library Collection RecordWe surveyed the effectiveness of livestock guard dogs for reduc-ing predation on domestic sheep in Colorado during 1993. The number of producers using dogs increased from about 25 in 1986 to >159…Publication Date 2000-05-01
- Puma concolor
- livestock numbers
- coyotes
- lambs
- ewes
- predation
- guard dogs
- sheep dogs
- mortality
- Ursus americanus
- pastures
- rangelands
- Colorado
- Akbash
- black bears
- Canis latrans
- coyote
- dog
- Felis concolor
- Great Pyrenees
- Komondor
- mountain lion
- sheep
- Ursus americanus
- Library Collection RecordSaltbush (Atriplex halimus L.), a native shrub which is adapted to arid rangelands, was transplanted to the semiarid grassland at Jordan University of Science and Technology Campus in 1986. Our…Publication Date 2000-03-01
- Atriplex halimus
- Jordan
- leaves
- mineral content
- semiarid grasslands
- ratios
- stems
- protein content
- fiber content
- dry seasons
- chemical composition
- phosphorus
- calcium
- sheep
- seasonal variation
- Library Collection RecordThe Rangelands archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from…Publication Date 2000-02-01
- lakes
- playa soils
- pollen analysis
- Pleistocene era
- paleoecology
- climate change
- botanical composition
- natural grasslands
- Texas
- Library Collection RecordWater yield from rangeland on the Edwards Plateau, Texas is significantly greater if a site is dominated by grass instead of brush. Brush control programs are being considered by policy-makers as a…Publication Date 2000-01-01
- leasing
- farm surveys
- farm income
- game animals
- water yield
- watershed management
- ranching
- hunting
- cost analysis
- decision making
- brush control
- Texas
- wildlife management
- range management
- Library Collection RecordCarefully-managed livestock grazing has been offered as a tool to improve the forage quality of graminoids on big game winter range. Formal testing of this theory has thus far been done using hand…Publication Date 2000-01-01
- Festuca idahoensis
- Pseudoroegneria spicata
- Carex geyeri
- stems
- Carex
- savannas
- Cervus elaphus
- rain
- stocking rate
- Oregon
- crude protein
- shrubs
- sheep
- in vitro digestibility
- biomass
- canopy
- grazing
- forage
- Library Collection RecordThe seasonal variations in nitrogen and phosphorus fractions and cations in 2 species of Atriplex common to Western Australia (Atriplex amnicola P.G. Wilson and Atriplex nummularia Lindl.) were…Publication Date 2000-01-01
- Atriplex amnicola
- plant proteins
- metal ions
- fractionation
- Atriplex nummularia
- Western Australia
- nutrient requirements
- solubility
- ambient temperature
- rain
- sodium
- species differences
- nitrogen
- potassium
- phosphorus
- sheep
- seasonal variation
- Library Collection RecordThe scientific study of rangelands in the western United States, started with the first collection of natural history specimens in the 18th century. Gradually over the 19th century, a basic catalog…Publication Date 2000-01-01
- land productivity
- Rocky Mountain region
- public domain
- history
- range condition
- sustainability
- sheep
- overgrazing
- range management
- rangelands
- Library Collection RecordThe development of the non-woolled Dorper sheep breed is briefly reviewed. Despite the large number of Dorpers in South Africa, precious little research results have been published on its nutrition…Publication Date 2000
- Breed development
- diet selection
- Voluntary feed intake
- Rumen variables
- reproduction
- production
- animal nutrition
- animal production
- sheep
- Africa
- Library Collection RecordAbstract not Available.Publication Date 2000
- ecology
- rabbits
- sheep
- Dingo Fence
- kangaroos
- South Australia
- Library Collection RecordThe Rangelands archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from…Publication Date 1999-12-01
- liveweight gain
- mortality
- lambing rate
- lambs
- fleece weight
- biomass production
- weaning weight
- income
- range condition
- forage
- rain
- Arizona
- Utah
- sheep
- stocking rate
- grazing intensity
- costs and returns
- cattle
- New Mexico
- botanical composition
- rangelands
- range management