Rangeland Ecology & Management
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Displaying 101 - 150 of 337 results
- Library Collection RecordJunipers (Juniperus spp.) and pinyons (pinus edulis Engelm.) are reinfesting areas from which they have been removed and are encroaching into other areas. Controlling these trees while they are small…Publication Date 1990-05-01
- pesticide application
- Pinus edulis
- soil classification
- tebuthiuron
- brush control
- picloram
- range management
- Juniperus
- New Mexico
- 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 RecordBehavioral characteristics of supplemented (S; 23% crude protein, 3.41 mcal DE/kg) and nonsupplemented (N) ewes grazing native New Mexico rangeland were monitored from December 1983 to August 1984.…Publication Date 1990-09-01
- lambing
- ewe feeding
- movement
- ewes
- liveweight gain
- winter
- spring
- dietary supplements
- natural grasslands
- summer
- diets
- grazing behavior
- New Mexico
- feed intake
- Library Collection RecordThree rates of dried sewage sludge (22.5, 45.0, and 90.0 Mg (megagrams) ha-1), were applied to a degraded semiarid grassland site on the Upper Rio Puerto Watershed in west-central New Mexico. Various…Publication Date 1990-07-01
- heavy metals
- sewage sludge
- semiarid soils
- soil amendments
- grassland improvement
- population density
- soil fertility
- Gutierrezia sarothrae
- yields
- trace elements
- nutrient contents of plants
- Bouteloua gracilis
- growth rate
- botanical composition
- New Mexico
- forage
- Library Collection RecordPhenology of mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.] was studied from 1979 to 1987 on the Jornada Experimental Range in southern New Mexico. Growing season (March through November)…Publication Date 1991-01-01
- Sporobolus flexuosus
- Chihuahuan Desert
- crop growth stage
- Sporobolus
- deserts
- growth rate
- precipitation
- adaptability
- phenology
- rangelands
- pasture plants
- New Mexico
- plant height
- 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 RecordBest linear unbiased prediction (BLUP) procedures were used to separate genetic merit from environmental effects on 205-d weight (205-d wt) of calves produced by cows grazing 2 pasture systems.…Publication Date 1990-09-01
- liveweight gain
- calves
- continuous grazing
- progeny testing
- breeding value
- best linear unbiased prediction
- genetic effects
- responses
- environmental factors
- heifers
- rotational grazing
- diets
- cattle
- grazing
- New Mexico
- 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 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 RecordRehabilitation of degraded rangeland requires rebuilding the soil, including soil biota. In this study wheat straw, bark and wood chips, and dried municipal sludge were placed on native range plots…Publication Date 1989-01-01
- soil biology
- organic fertilizers
- microorganisms
- straw
- degradation
- rangeland soils
- soil amendments
- arthropods
- New Mexico
- Library Collection RecordThis rainfall simulation study evaluates the effects of slope, vegetation, rock, and soil characteristics on interrill erosion of semiarid slopes of the Guadalupe Mountains of New Mexico. A single-…Publication Date 1989-01-01
- interrill erosion
- hydrology
- watershed management
- rain
- environmental factors
- slopes
- semiarid zones
- simulation
- New Mexico
- Library Collection RecordIndividual leaders of fourwing saltbush were permanently marked and their growth responses monitored during a 3-year study in a shortduration grazing system, a 4-pasture rotation system, and in…Publication Date 1989-03-01
- growth rate
- grazing
- New Mexico
- Library Collection RecordThe matric potential of soil water is presented for 6 clay loam sites on floodplains of arid rangelands. Gypsum resistance blocks impregnated with plaster of paris were placed at 6 soil depths to 122…Publication Date 1989-09-01
- matric potential
- clay loam soils
- New Mexico
- 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 RecordEstablishment, yield, and nutritional quality of 'Nordan' crested wheatgrass (Agropyron desertorum [Fischer ex Link] Schultes), 'Fairway' crested wheatgrass (Agropyron cristatum […Publication Date 1989-03-01
- Elytrigia
- Agropyron
- yields
- chemical composition
- species differences
- Pascopyrum smithii
- Artemisia tridentata
- New Mexico
- Library Collection RecordA field experiment using 2 patterns of irrigation and 1 level of nitrogen fertilizer (10 g-N m-2) was conducted in order to discern water and nitrogen interactions that may control production of…Publication Date 1988-09-01
- reproductive physiology
- Larrea tridentata
- water uptake
- irrigation water
- plant development
- nitrogen fertilizers
- growth
- range management
- rangelands
- New Mexico
- 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 need for forage plants that are productive in, and adapted to, semiarid conditions prompted us to examine the range and independence of assortment of nutritional qualities of wild stands of…Publication Date 1988-03-01
- Salsola
- water soluble compounds
- acid detergent fiber
- Southwestern United States
- physicochemical properties
- nitrates
- oxalates
- lignin
- crude protein
- California
- semiarid zones
- in vitro digestibility
- Texas
- Nevada
- nutritive value
- New Mexico
- Arizona
- forage
- dry matter
- Library Collection RecordBetween 1915 and 1932, permanent 1 × 1-m quadrats were established on grasslands of the Jornada Experimental Range in southern New Mexico. Quadrat records accumulated from 1915 to 1979 on grasslands…Publication Date 1988-05-01
- change
- experimental stations
- varieties
- basal area
- arid zones
- ecological succession
- woody plants
- environmental factors
- Poaceae
- plant density
- range management
- rangelands
- grazing
- New Mexico
- Library Collection RecordCattle production on desert grassland ranges in southern New Mexico has been low, although limited research shows diet nutritional quality of cattle is adequate to meet production needs during most…Publication Date 1987-07-01
- dona ana county, new mexico
- production
- deserts
- dietary fiber
- grasslands
- feces composition
- steers
- crude protein
- diets
- protein supplements
- seasonal variation
- rangelands
- New Mexico
- forage
- feed intake
- Library Collection RecordEight field trials [early August 1983 (EAUG83), late August 1983 (LAUG83), early November 1983 (ENOV83), early January 1984 (EJAN84), May 1984 (MAY84), late July 1984 (LJUL84), late August 1984 (…Publication Date 1987-11-01
- fertilizer application
- nitrogen
- digestion
- steers
- digesta
- kinetics
- Bouteloua gracilis
- rumen fermentation
- botanical composition
- rangelands
- grazing
- New Mexico
- forage
- feed intake
- 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 RecordBroom snakeweed (Gutierrezia sarothrae [Pursh] Britt. and Rusby) has increased in density and distribution on many southwestern ranges. The objective of this study was to determine root and shoot…Publication Date 1988-01-01
- roots
- shoots
- Gutierrezia sarothrae
- seedlings
- growth rate
- establishment
- biomass
- New Mexico
- Library Collection RecordInfiltration, sediment concentration of runoff, and sediment production from lightly grazed and ungrazed semiarid slopes were compared using a hand-portable rainfall simulator. The study slope was…Publication Date 1988-07-01
- hydrologic factors
- mountains
- mountain areas
- sediments
- highlands
- runoff
- slopes
- semiarid zones
- sheep
- rangelands
- grazing
- infiltration
- New Mexico
- Library Collection RecordProfit maximizing combinations of livestock enterprises, plant control practices, and grazing management systems for ranches in the southern High Plains were examined. A typical ranch and a multi-…Publication Date 1987-11-01
- farm income
- linear programming
- timing
- grassland improvement
- ranching
- brush control
- Quercus havardii
- cattle
- Texas
- range management
- grazing
- New Mexico
- Library Collection RecordWithin the pinyon-juniper type, trees and understory vegetation are interspersed with open areas forming a mosaic of vegetational patterns. The objective of this research was to define and describe…Publication Date 1988-03-01
- ecological zones
- Juniperus monosperma
- plant community analysis
- forest ecology
- Pinus edulis
- statistical analysis
- geographical distribution
- canopy
- New Mexico
- 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 RecordTobosa (Hilaria mutica [Buckl.] Benth.) was seasonally grazed with cattle under high-density (2.1 to 5.1 animal unit/hectare [AU/ha]) rotation and low-density (0.33 and 0.39 AU/ha) continuous…Publication Date 1988-01-01
- crop quality
- Hilaria mutica
- arid zones
- liveweight gain
- stocking rate
- rotational grazing
- crude protein
- cattle
- rangelands
- grazing
- New Mexico
- forage
- 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 RecordThe influence of individual broom snakeweed (Gutierrezia sarothrae [Pursh] Britt. & Rushby) plants on the distribution of buried viable seed and the distribution of plants in the field was…Publication Date 1987-09-01
- deserts
- distribution
- grasslands
- seedling emergence
- allelopathy
- Gutierrezia sarothrae
- seeds
- botanical composition
- New Mexico
- 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 RecordWeight relations for twig lengths and diameters were determined for hairy mountain mahogany plants in southern New Mexico. Both twig lengths and twig diameters were related linearly to twig weights.…Publication Date 1988-03-01
- crop production
- plant anatomy
- statistical analysis
- branches
- length
- diameter
- cercocarpus breviflorus
- weight
- browsing
- grazing
- New Mexico
- 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 RecordThe objective of this study was to develop a small plot (1 m2) rainfall simulator operational on steep terrain in the Guadalupe Mountains of New Mexico. The simulator developed is hand-portable and…Publication Date 1986-07-01
- portable sprayers
- sloping land
- arid zones
- watersheds
- soil erosion
- design
- runoff
- rainfall simulators
- water quality
- infiltration
- New Mexico
- Library Collection RecordThis study determined the impacts of fertilization and livestock grazing on infiltration rates and sediment production. Infiltration rates and sediment production varied across years, depending on…Publication Date 1986-07-01
- sediments
- fertilizer application
- stocking rate
- Bouteloua gracilis
- rangelands
- livestock
- grazing
- infiltration
- bulk density
- New Mexico
- 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 RecordAverage grazing lease prices as tabulated in the 1985 federal grazing fee review and evaluation study were found to be significantly different between some pricing regions of the study. Comparing the…Publication Date 1986-05-01
- fees
- grazing on public land
- aggregations
- data analysis
- statistical analysis
- rangelands
- New Mexico
- Library Collection RecordBetween 1915 and 1932, 104 permanent 1 × 1-m quadrats were established on grasslands of the Jornada Experimental Range in southern New Mexico. Primary- and secondary-dominant species were determined…Publication Date 1987-03-01
- plant ecological groups
- scleropogon brevifolius
- Bouteloua eriopoda
- deserts
- Hilaria mutica
- grasslands
- dominant species
- plant ecology
- ecological succession
- woody plants
- Poaceae
- range management
- New Mexico
- Library Collection RecordPlant nitrate (NO_3-N) uptake rates are often low in desert environments because soil nitrogen levels are typically low, and mineralization and nitrification of nitrogen is moisture-dependent. During…Publication Date 1986-11-01
- nitrate reductase
- Panicum coloratum
- enzyme activity
- nitrogen metabolism
- developmental stages
- nitrate nitrogen
- deserts
- leaf water content
- leaf water potential
- drought
- New Mexico
- water stress
- Library Collection RecordProtein supplementation is widely used to enhance the nutritional status of cattle on rangeland. The effects of protein supplementation on particulate and fluid passage rates, rumen fermentation, and…Publication Date 1987-03-01
- volatile fatty acids
- alfalfa pellets
- alfalfa
- alfalfa hay
- ammonium nitrogen
- cottonseed meal
- liveweight gain
- hay
- dietary supplements
- pH
- transit time
- protein supplements
- rumen fermentation
- rangelands
- grazing
- New Mexico
- beef cattle
- Library Collection RecordMany studies have been made, and continue to be conducted, to determine infiltration rates and sediment production on rangelands. Most of these studies use small sample plots (<2 m2). This study…Publication Date 1987-05-01
- hydrology
- sediments
- soil erosion
- grasslands
- sampling
- rangelands
- infiltration
- New Mexico
- Library Collection RecordThe objectives of this study were to determine the influence of short duration grazing, continuous grazing, and grazing exclusion on infiltration rates on 2 range sites in southcentral and…Publication Date 1986-07-01
- grazing time
- hydrology
- grazing experiments
- rangelands
- grazing
- infiltration
- New Mexico
- Library Collection RecordTwo aerial applications of 2,4,5-T [2,4,5-trichlorophenoxy) acetic acid] were applied to 3,634 ha of mesquite (Prosopis glandulosa Torr. var. glandulosa) dunelands in southern New Mexico. Herbicide…Publication Date 1986-07-01
- Coleoptera
- duneland
- tetralopha euphenella
- soil biology
- aerial spraying
- herbicide residues
- birds
- ecosystems
- 2,4,5-T
- arid zones
- Prosopis glandulosa var. glandulosa
- weight
- mammals
- cattle
- rangelands
- New Mexico
- forage
- Library Collection RecordPrincipal component analysis (PCA) was used to interpret secondary succession of pinyon-juniper stands after cabling or bulldozing. Soil types were used to separate 93 sample units into 3 groupings.…Publication Date 1987-01-01
- principal component analysis
- bulldozing
- cabling
- quercus undulata
- mechanical methods
- plant community analysis
- secondary succession
- pinyon-juniper
- ecological succession
- range management
- botanical composition
- rangelands
- New Mexico
- Library Collection RecordThe dry-weight-rank (DWR) method for determining species composition of tallgrass prairie vegetation was compared to hand clipping. Species composition estimates for the 2 methods were similar in 3…Publication Date 1986-05-01
- vegetation sampling
- species
- vegetation
- sampling
- Oklahoma
- prairies
- botanical composition
- rangelands
- dry matter
- Library Collection RecordSome high-elevation summer ranges in southwestern Utah are characterized by a dominance of grass and low-value forbs. A reference area of forb dominance provides a striking contrast to these grass…Publication Date 1986-09-01
- long term experiments
- regenerative ability
- vegetation
- mountain grasslands
- sheep
- Utah
- grazing
- Library Collection RecordPinyon (Pinus edulis Engelm.), one-seed juniper (Juniperus monosperma (Engelm.) Sarg.), and alligator juniper (J. deppeana Steud.) woodlands in southwestern New Mexico were thinned, were pushed with…Publication Date 1986-09-01
- Juniperus deppeana
- thinning
- Juniperus monosperma
- long term experiments
- Pinus edulis
- regenerative ability
- ecological succession
- woody plants
- woodlands
- plant density
- establishment
- New Mexico
- zero grazing
- Library Collection RecordLive and standing dead biomass, standing crop, and total nitrogen, within each component, were measured in a big sacaton (Sporobolus wrightii Monro) grassland in southeastern Arizona for 3 years to…Publication Date 1985-05-01
- Sporobolus wrightii
- Sporobolus
- soil
- biomass determination
- grasslands
- vegetation
- nitrogen content
- Texas
- grazing
- New Mexico
- Arizona