Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 151 - 200 of 425 results
- Library Collection RecordManagers and range scientists are interested in the response of such variables as forage production and animal performance to various environmental and management factors. Due to the inability to…Publication Date 1993-03-01
- data analysis
- simulation models
- mathematical models
- decision making
- range management
- rangelands
- forage
- Library Collection RecordGlobemallows (Sphaeralcea spp.) are well adapted to semiarid and arid environments. They are potentially useful as the forb component of seeding mixtures for rangeland improvement in the western…Publication Date 1993-03-01
- Sphaeralcea
- Medicago sativa
- arid lands
- Agropyron desertorum
- Agropyron cristatum
- species differences
- Idaho
- sheep
- grazing behavior
- pasture plants
- forage
- feeding preferences
- Library Collection RecordFrom a planting of antelope bitterbrush (Purshia tridentata Purshia DC) and 'Hobble Creek' mountain big sagebrush (Artemisia tridentata ssp. vaseyana Rydb. Beetle), pairs of plants were…Publication Date 1992-03-01
- monoterpenoids
- Purshia tridentata
- palatability
- winter
- Artemisia tridentata
- Odocoileus hemionus
- Utah
- forage
- feeding preferences
- chemical constituents of plants
- Library Collection RecordConcerns for the future of California's oak-woodlands have intensified the need to better understand how different overstory species affect herbage standing crops and species frequencies. Data…Publication Date 1991-07-01
- topography
- understory
- woodland grasslands
- site factors
- Quercus douglasii
- Quercus wislizeni
- Pinus sabiniana
- annual grasslands
- ceanothus cuneatus
- herbage standing crop
- plant ecology
- species diversity
- ecological succession
- biomass production
- plant communities
- California
- botanical composition
- forage
- 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 RecordPaper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. A diverse array of secondary metabolites deters feeding by mammals on…Publication Date 1992-01-01
- mammals
- woody plants
- environmental factors
- tannins
- digestion
- herbivores
- regrowth
- secondary metabolites
- defense mechanisms
- browsing damage
- browsing
- forage
- chemical constituents of plants
- Library Collection RecordIntensive grazing strategies for the Nebraska Sandhills must be based on time and frequency of defoliation of key warm-season grasses. A 3-year field study was conducted in the Nebraska Sandhills to…Publication Date 1991-05-01
- buds
- Andropogon gerardii var. paucipilus
- timing
- clipping
- Calamovilfa longifolia
- dry matter accumulation
- cutting date
- cutting frequency
- Nebraska
- Andropogon gerardii
- tillers
- crop yield
- defoliation
- grazing
- forage
- Library Collection RecordThe Sandy Ridge Site of southern New Mexico was studied to determine the dependance of total standing crop and components of standing crop on range condition rating. Total standing crop which…Publication Date 1991-11-01
- Prosopis glandulosa
- ecological succession
- botanical composition
- rangelands
- New Mexico
- forage
- Library Collection RecordTwo trials were conducted to compare diet samples collected in the evacuated rumen or through the esophageal fistula. Hypotheses tested were (1) rumen evacuation would not decrease selectivity, (2)…Publication Date 1991-09-01
- rumen
- fistulation
- grazing trials
- rumen contents
- chemical composition
- sampling
- esophagus
- cattle
- forage
- feed intake
- Library Collection RecordRevenues associated with controlling broom snakeweed (Xanthocephalum sarothrae) on 6 soils with heavy, moderate, and light infestations of snakeweed were estimated. The analysis considered economic…Publication Date 1991-05-01
- poisoning
- poisonous weeds
- economic analysis
- liveweight gain
- weed control
- Gutierrezia sarothrae
- reproductive performance
- chemical control
- profitability
- finishing
- picloram
- Texas
- New Mexico
- beef cattle
- forage
- Library Collection RecordTwo experiments were conducted to investigate the effects of restricted forage intake on patterns of chromium excretion to determine sample window duration and the accuracy and precision of fecal…Publication Date 1992-03-01
- chromium
- captec bolus
- boluses
- excretion
- estimation
- feces composition
- sampling
- steers
- cattle feeding
- quality
- beef cattle
- forage
- feed intake
- 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 RecordTo help local Niger government authorities and donor countries ameliorate conditions in the advent of drought, a rapid yet simple means to assess annual herbaceous production at the end of the rainy…Publication Date 1992-05-01
- Sahel
- Niger
- mathematical models
- prediction
- meteorological data
- regression analysis
- rain
- crop production
- biomass
- rangelands
- forage
- Library Collection RecordEfficacy of a continuous release marker device (CRD) containing chromium oxide to estimate fecal output was evaluated in two 12-day grazing trials with beef steers (n = 10, trial 1; n = 7, trial 2).…Publication Date 1991-05-01
- markers
- chromic oxide
- grazing trials
- feces
- sampling
- animal nutrition
- beef cattle
- forage
- feed intake
- Library Collection RecordIn vivo digestibility trials involving cattle (steers) and goats (wethers) fed shrub and nonshrub mixtures were conducted to evaluate the potential of fecal output, fecal nitrogen output, and fecal…Publication Date 1992-03-01
- energy metabolism
- wethers
- excretion
- Sphaeralcea coccinea
- nitrogen metabolism
- Atriplex canescens
- estimation
- feces composition
- Croton
- steers
- digestibility
- shrubs
- goats
- nutritive value
- quality
- Cercocarpus montanus
- New Mexico
- beef cattle
- forage
- feed intake
- Library Collection RecordThe accuracy of microhistological techniques for analysis of herbivore diets was evaluated with cattle, sheep, and Angora goats fed grass, forb, and shrub mixtures of known botanical compositions.…Publication Date 1992-03-01
- feces analysis
- assessment
- feces composition
- shrubs
- diets
- sheep
- goats
- cattle
- botanical composition
- grasses
- New Mexico
- forage
- feeding preferences
- Library Collection RecordThe usefulness of near infrared reflectance spectroscopy (NIRS) for predicting diet quality of free-ranging cattle through fecal analysis was examined. Diet samples were obtained with esophageal…Publication Date 1992-05-01
- organic matter
- protein content
- prediction
- feces
- infrared spectroscopy
- steers
- digestibility
- crude protein
- diets
- Texas
- nutritive value
- grazing
- beef cattle
- forage
- Library Collection RecordFertilizer nitrogen (N) management and other cultural practices used in reclamation can have a significant effect on the successful revegetation of mined lands. Repeated fertilization of revegetated…Publication Date 1991-07-01
- annual dressings
- split dressings
- crimped straw mulches
- stubble mulching
- ammonium nitrate
- straw mulches
- mined soils
- reclamation
- Poaceae
- biomass production
- Wyoming
- land restoration
- application rates
- grasses
- forage
- Library Collection RecordLive oak (Quercus virginiana Mill.) competes with herbaceous plants, but provides browse and mast for white-tailed deer (Odocoileus virginianus Zimmerman). We determined the effects of treating live…Publication Date 1991-09-01
- grassland improvement
- nutritional status
- browse
- Quercus virginiana
- foraging
- tebuthiuron
- woodland grasslands
- weed control
- yields
- Odocoileus virginianus
- biomass production
- Texas
- botanical composition
- browsing
- grasses
- forage
- feeding preferences
- Library Collection RecordTwo experiments with steers were conducted to evaluate the influence of native forbs and shrubs on nitrogen utilization by cattle. Diets in Exp. 1 were blue grams (Bouteloua gracilis [H.B.K.]) (BG),…Publication Date 1992-03-01
- barley straw
- croton pottsii
- nitrogen retention
- Hordeum vulgare
- Sphaeralcea coccinea
- nitrogen metabolism
- Medicago sativa
- alfalfa
- alfalfa hay
- Atriplex canescens
- Croton
- hay
- steers
- cattle feeding
- Bouteloua gracilis
- shrubs
- rangelands
- nutritive value
- quality
- Cercocarpus montanus
- New Mexico
- beef cattle
- forage
- Library Collection RecordThis study investigated the effect of grazing by California bighorn sheep (Ovis canadensis californiana) on plant community structure. Over 28 months from 1977 to 1979, bighorn diet consisted of 79…Publication Date 1991-09-01
- Ovis canadensis
- Ovis canadensis californiana
- community ecology
- British Columbia
- grasslands
- plant ecology
- species diversity
- ecological succession
- feces composition
- vigor
- plant communities
- shrubs
- botanical composition
- grazing
- grasses
- forage
- feeding preferences
- Library Collection RecordPaper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. Livestock poisoning by plants is one of the serious causes of economic…Publication Date 1992-01-01
- livestock and meat industry
- losses
- economic impact
- toxicity
- Western United States
- sheep
- cattle
- forage
- poisonous plants
- Library Collection RecordThe concept of market interdependence is defined in this paper as the influence that public market quantity allocations and pricing decisions have on observed quantity and price in private markets.…Publication Date 1992-03-01
- market
- private sector
- public sector
- market interdependence
- fair market value
- malheur national wildlife refuge
- federal government
- regulation
- econometric models
- market prices
- Oregon
- United States
- forage
- Library Collection RecordPerennial plants collected from 5 north-central Arizona semiarid locations were assayed for tebuthiuron [N-5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl-N,N'-dimethylurea] and its metabolites…Publication Date 1991-05-01
- long term experiments
- herbicide residues
- metabolites
- Bouteloua eriopoda
- Bouteloua curtipendula
- tebuthiuron
- Poaceae
- Bouteloua gracilis
- shrubs
- semiarid zones
- application rates
- rangelands
- Arizona
- forage
- Library Collection RecordVariable weather, forage production, weed and pest problems, and livestock prices contribute to uncertainty in range livestock production. Because returns from livestock production, in which…Publication Date 1991-05-01
- prices
- econometric models
- stochastic processes
- variability of returns
- risk
- costs and returns
- animal production
- stocking rate
- profitability
- sustainability
- range management
- livestock
- forage
- Library Collection RecordCottonseed hull fragments were identified in feces collected for the first 14 of 17 days after ingestion of 1 g cottonseed hulls by each of 4 adult nude white-tailed deer (Odocoileus virginianus).…Publication Date 1992-01-01
- cottonseed hulls
- estimation
- duration
- feces composition
- Odocoileus virginianus
- digestion
- digestibility
- forage
- Library Collection RecordWeeping lovegrass [Eragrostis curvula (Schrad.) Nees.] provides high quality forage during May, but growth of floral stems causes a rapid decline in forage quality. The study objective was to…Publication Date 1991-09-01
- mefluidide
- heading
- floral stems
- heading date
- leaves
- application timing
- Eragrostis curvula
- stems
- yields
- crude protein
- in vitro digestibility
- application rates
- phenology
- forage
- Library Collection RecordThe government must manage public rangeland in the face of alternative multiple use interests, including wildlife and domestic livestock production. The objectives of this study were to estimate a…Publication Date 1991-07-01
- linear programming
- mixed grazing
- production possibilities
- economic benefits
- production possibilities frontier
- marginal rates of substitution
- marginal returns
- animal production
- multiple land use
- cost-benefit analysis
- stocking rate
- Antilocapra americana
- biomass production
- Wyoming
- grazing intensity
- cattle
- range management
- rangelands
- forage
- Library Collection RecordIn vitro and in vivo digestion trials with lambs were conducted to determine effects of ponderosa pine needles (PN; Pinus ponderosa Laws.) on digestibility of crested wheatgrass (CW; Agropyron…Publication Date 1992-05-01
- nitrogen retention
- lambs
- toxicity
- conifer needles
- Agropyron desertorum
- Pinus ponderosa
- fiber content
- digestibility
- crude protein
- diets
- in vitro digestibility
- forage
- Library Collection RecordThe effect of late-autumn cattle grazing on plant biomass was examined in a western Great Plains cottonwood riparian zone prone to catastrophic flooding every 5-8 years. Following 1 year of pre-…Publication Date 1991-07-01
- autumn
- Populus
- floodplains
- Spartina
- Spartina pectinata
- environmental impact
- community ecology
- Populus deltoides subsp. monilifera
- standing biomass
- community composition
- riparian grasslands
- Salix
- leaves
- controlled grazing
- plant ecology
- flooding
- riparian buffers
- biomass production
- cattle
- biomass
- botanical composition
- grazing
- Colorado
- forage
- 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 RecordTall-forb communities occur an deep soils of the upper montane and subalpine zones of the Rocky Mountains and extend from southwestern Montana to southern Utah. In the Centennial Mountains of Montana…Publication Date 1991-07-01
- geranium viscosissimum
- 2,4-D
- grassland improvement
- Geranium
- vegetation management
- species diversity
- weed control
- yields
- mountain grasslands
- biomass production
- plant communities
- picloram
- application rates
- Montana
- forage
- Library Collection RecordPonderosa pine (Pinus ponderosa Laws.) overstory-forage understory relationships were studied on the Kaibab Plateau of northern Arizona to evaluate how well forage (graminoid, forb, and current year…Publication Date 1992-05-01
- stand density
- stand structure
- understory
- mathematical models
- prediction
- indexes
- Pinus ponderosa
- regression analysis
- crop production
- canopy
- Arizona
- 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 RecordPaper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. Tannins are a diverse group of compounds which precipitate protein. The…Publication Date 1992-01-01
- gallotannins
- metabolic detoxification
- molecular weight
- tannins
- digestion
- herbivores
- ruminants
- digestibility
- forage
- chemical constituents of plants
- Library Collection RecordThirty-six wethers were used in 3 trials to compare estimates of fecal output using chromic oxide either in a continuous-release bolus or dosed twice daily. Wethers were confined in metabolism crates…Publication Date 1991-07-01
- continuous release bolus
- fecal output
- boluses
- chromic oxide
- dosage
- feces composition
- feces
- sheep
- forage
- feed intake
- Library Collection RecordA sequential multiple latin square experimental design was evaluated as a tool for establishing dietary preference rankings. Dietary preference of 4 grasses was determined by a series of four 4 X 4…Publication Date 1991-05-01
- ranking
- Alopecurus arundinaceus
- Alopecurus
- lambs
- Festuca arundinacea
- evaluation
- palatability
- statistical analysis
- forage
- feed intake
- feeding preferences
- Elytrigia elongata
- Library Collection RecordThe dry-weight rank technique has been used to measure vegetation in various habitats but has not been evaluated in desert shrub habitats. We sampled browse, forb, and grass in the palo-verde (…Publication Date 1991-07-01
- Sonoran Desert
- ranking
- xerophytes
- mountains
- deserts
- semi-desert scrub
- browse
- measurements
- plant ecology
- sampling
- slopes
- grasses
- Arizona
- forage
- dry matter
- Library Collection RecordWe compared long-term historical and stochastically generated weather records in terms of their statistical attributes and effects on herbage yield and runoff forecasts calculated from model…Publication Date 1991-05-01
- yield forecasting
- hydrology models
- stochastic processes
- hydrologic data
- solar radiation
- simulation models
- prediction
- meteorological data
- air temperature
- runoff
- precipitation
- crop yield
- rangelands
- forage
- Library Collection RecordA tandem arrangement of 3 grinding mills was devised to decrease the time required in grinding dried forage herbage to the uniform small particle size suitable for near infrared analysis. The…Publication Date 1990-09-01
- milling
- mills
- sample processing
- particle size
- sampling
- forage
- Library Collection RecordTwo experiments with wethers and one with steers were conducted to compare extraction methods of ash-free indigestible acid detergent fiber (IADF) from feed, and to determine variation across days in…Publication Date 1990-05-01
- wethers
- fistulation
- digestibility trials
- grazing trials
- fiber content
- esophagus
- steers
- forage
- Library Collection RecordPrairie threeawn (Aristida oligantha Michx.) is an indicator of deteriorated range and is unpalatable and mechanically injurious to livestock. The effects of date of burning (November, February, or…Publication Date 1990-09-01
- crop quality
- atrazine
- burning
- cultural control
- Aristida oligantha
- grassland improvement
- weed control
- chemical control
- Oklahoma
- natural grasslands
- prairies
- crop yield
- forage
- Library Collection RecordAn experiment was conducted to determine whether or not the effects of forage type and time into feeding period precluded use of esophageal extrusa to estimate relative dietary mineral status of…Publication Date 1990-03-01
- foraging period
- wheat
- assessment
- Cynodon dactylon
- nutritional status
- hay
- mineral nutrition
- steers
- diets
- forage
- 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 RecordSurface-applied zinc (Zn) in range with claypan soils could increase herbage production, but the Zn concentration could become toxic to the crown and roots of blue grama (Bouteloua grucilis).…Publication Date 1991-01-01
- zinc fertilizers
- zinc chloride
- zinc chelates
- nutrient content
- phytotoxicity
- nutrient uptake
- Bouteloua gracilis
- application rates
- 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 RecordA study was made in the Rough Fescue Grasslands of southwestern Alberta to determine the yield response of rough fescue (Festuca scabrella var campestris Rydb.) and Parry oat grass (Danthonia parryi…Publication Date 1991-01-01
- festuca scabrella var. campestris
- Festuca altaica
- clipping
- danthonia parryi
- Danthonia
- Alberta
- cutting frequency
- regrowth
- growth rate
- crop yield
- defoliation
- grazing
- simulation
- forage
- plant height
- Library Collection RecordResponse of key warm-season grasses to time, frequency, and duration of defoliation is needed to develop grazing systems for the Nebraska Sandhills. A 3-year (1986 to 1988) study was conducted on a…Publication Date 1990-11-01
- leaf duration
- crop growth stage
- buds
- timing
- Schizachyrium scoparium
- dry matter accumulation
- persistence
- cutting date
- cutting frequency
- Nebraska
- tillering
- defoliation
- forage
- 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
Pagination
- First page
- Previous page
- …
- 2
- 3
- 4
- 5
- 6
- …
- Next page
- Last page