Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Kentucky (4548)
- University of Nebraska - Lincoln (988)
- University of South Florida (370)
- Department of Primary Industries and Regional Development, Western Australia (343)
- Utah State University (262)
-
- Western Kentucky University (241)
- University of Arkansas, Fayetteville (188)
- University of Texas Rio Grande Valley (180)
- University of Colorado Law School (164)
- Old Dominion University (76)
- East Tennessee State University (66)
- University of Nevada, Las Vegas (57)
- Missouri University of Science and Technology (56)
- Montclair State University (56)
- Portland State University (53)
- Boise State University (52)
- TÜBİTAK (49)
- California Polytechnic State University, San Luis Obispo (48)
- South Dakota State University (48)
- University of North Dakota (47)
- Central Washington University (46)
- City University of New York (CUNY) (44)
- Western Michigan University (44)
- University of Northern Iowa (40)
- Louisiana State University (39)
- Wright State University (37)
- Fort Hays State University (36)
- Smith College (36)
- University of Minnesota Morris Digital Well (36)
- University of New Hampshire (36)
- Keyword
-
- Grazing (280)
- Western Australia (245)
- Climate change (151)
- Sheep (131)
- Soil (130)
-
- Cattle (117)
- Nitrogen (110)
- Pasture (103)
- Water quality (101)
- Forage (99)
- Drought (97)
- Geology (96)
- Groundwater (92)
- Intake (92)
- Grassland (91)
- Livestock (87)
- Biodiversity (86)
- Digestibility (85)
- Silage (83)
- Sustainability (83)
- Natural resources (82)
- Stocking rate (82)
- Phosphorus (78)
- Conservation (77)
- Forage quality (77)
- Grains and field crops (77)
- United States (77)
- Agriculture (74)
- Alfalfa (73)
- Grazing management (67)
- Publication Year
- Publication
-
- IGC Proceedings (1977-2023) (4103)
- United States Geological Survey: Staff Publications (354)
- International Journal of Speleology (229)
- Kentucky Alfalfa and Stored Forage Conference (147)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (142)
-
- Theses and Dissertations (138)
- Mammoth Cave Research Symposia (133)
- Kentucky Grazing Conference (129)
- Electronic Theses and Dissertations (112)
- Graduate Theses and Dissertations (89)
- Department of Earth and Atmospheric Sciences: Faculty Publications (82)
- Memorandum (82)
- School of Natural Resources: Dissertations, Theses, and Student Research (81)
- Masters Theses (74)
- Faculty Publications (70)
- Resource management technical reports (68)
- Experimental Summaries - Plant Research (63)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (62)
- School of Geosciences Faculty and Staff Publications (60)
- Journal of the Department of Agriculture, Western Australia, Series 4 (54)
- Masters Theses & Specialist Projects (52)
- United States Environmental Protection Agency: Publications (51)
- Turkish Journal of Earth Sciences (49)
- USF Tampa Graduate Theses and Dissertations (46)
- Bulletin of the University of Nebraska State Museum (1924–2023) (45)
- Bulletins 4000 - (43)
- Daugherty Water for Food Global Institute: Faculty Publications (43)
- United States Geological Survey: Publications (43)
- Journal of the Arkansas Academy of Science (40)
- National Drought Mitigation Center: Faculty Publications (39)
- Publication Type
- File Type
Articles 8461 - 8490 of 9404
Full-Text Articles in Entire DC Network
The Effect Of Industrial Development On The Sediment Contamination Of Apponaug Cove, A Historical Analysis, Marina Havan-Orumieh
The Effect Of Industrial Development On The Sediment Contamination Of Apponaug Cove, A Historical Analysis, Marina Havan-Orumieh
Marine Affairs Theses and Major Papers
Sediment cores have long been used to formulate the chronology of environmental contamination. This paper will investigate the utility of sediment cores in determining the chronology of trace metal contamination in Apponaug Cove, Rhode Island. A meter-long sediment core taken from the Cove was analyzed for chromium, copper, lead, zinc and nickel as well as organic pollutants coprostanol, polyaromatic hydrocarbons, benzotriazole and clorobenzotriazole. The core represents a close to 200 year record of sediments in Apponaug Cove. The cultural/economic changes in the Watershed in addition to environmental laws composed in the State and Federal levels which may have correlated with …
Sage Grouse Status And Recovery Plan For Strawberry Valley, Utah, United States Department Of Agriculture, Forest Service
Sage Grouse Status And Recovery Plan For Strawberry Valley, Utah, United States Department Of Agriculture, Forest Service
Wildlife Conservation and Management
Since 1939, an estimated 3,000 sage grouse in Strawberry Valley, UT, have declined to some 180 birds, mainly because of reservoir construction and eradication of big sagebrush to promote livestock forage. A 4-year study of numbers and movements of radio-tagged grouse has provided the basis for a recovery program calling for rejuvenation of big sagebrush and forbs important to grouse, replacement of mating grounds lost to human activities, consideration of sage grouse biology in management decisions, and formation of a sage grouse recovery team.
Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2, 4-D, United States Department Of Agriculture, Forest Service
Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2, 4-D, United States Department Of Agriculture, Forest Service
Forestry
The Pine Hollow aspen (Populus tremuloides) exclosures on the Ashley National Forest in eastern Utah were sampled in 1984, 19 years after they were established. The effects of 2, 4-D, wildlife, and cattle on plant succession were evaluated. Two exclosures were used to protect the sprayed area from (1) all animal use and (2) only livestock use. A third sprayed area was left open for use by all animals. The aspen overstory was killed as a result of spraying, with sufficient reproduction occurring to restock the stand. However, animal use drastically altered the aspen reproduction, as well as the understory …
Assessment Of Nongame Bird Habitat Using Forest Survey Data, United States Department Of Agriculture, Forest Service
Assessment Of Nongame Bird Habitat Using Forest Survey Data, United States Department Of Agriculture, Forest Service
Wildlife Conservation and Management
Forest Survey data have potential for use in obtaining information on the condition and diversity of the Nation's forest resources relevant to wildlife habitat that is needed for planning and monitoring at State and regional levels. In this study, Forest Survey data were used to assess nongame bird habitat potential based on food and shelter requirements on 24 plots. These assessments were then evaluated using bird numbers. Results of the analyses showed some correlation of bird numbers with tree canopy variables, and illustrate the potential for using Forest Survey data for wildlife habitat assessment, for identifying opportunities to improve habitat …
Response By Stylosanthes Hamata And S. Scabra To Phosphate On Three Soils In The North-Kimberley Of Western Australia, A Mcr Holm, Mario F. D'Antuono
Response By Stylosanthes Hamata And S. Scabra To Phosphate On Three Soils In The North-Kimberley Of Western Australia, A Mcr Holm, Mario F. D'Antuono
Resource management technical reports
Legume herbage mass was maximized after two or three years application of 50 kg/ha double superphosphate for both Verano and Fitzroy on Red earth soils and for Fitzroy on Yellow lateritic soils. There was increased production of Verano up to the maximum fertilizer level. Both varieties responded in the second year to residual P following application in the first year but there were no responses in subsequent years.
Organochlorine Residues In Soil And Plant., Tony Albertsen
Organochlorine Residues In Soil And Plant., Tony Albertsen
Experimental Summaries - Plant Research
Trial 5812
To determine the relationship between soil and plant Dieldrin contamination in vegetables.
Location: Bunbury Regional Office (experimental site)
Secondary Sympatric Occurrence Of Sibling Species Of Subterranean Shrimps In The Karst, M. Cobolli Sbordoni, M. Mattoccia, G. La Rosa, E. De Matthaeis, V. Sbordoni
Secondary Sympatric Occurrence Of Sibling Species Of Subterranean Shrimps In The Karst, M. Cobolli Sbordoni, M. Mattoccia, G. La Rosa, E. De Matthaeis, V. Sbordoni
International Journal of Speleology
Allozyme variation at 32 gene loci was studied in cave dwelling shrimps of the genus Troglocaris (fam. Atyidae). Populations were collected from several caves and wells belonging to different drainage systems in the Karst areas of NE Italy. Results suggest the existence of two sympatric, genetically distinct, biological species (provisionally indicated as species A and B in the T. anophthalmus complex) in the samples collected at the Duino Well, Sagrado and Comarie caves (Nei’s `D= 0.209). Samples from Gradisca and Aurisina are represented by only one (A) or the other (B) of the two species, respectively. Two remaining eastern populations …
Isopoda (Crustacea: Isopoda: Microcharon, Jaera, Proasellus) And Other Fauna In Hypogean Waters Of Southern Cyprus, Boris Sket
International Journal of Speleology
Springs and wells in SW and S part of Cyprus were briefly surveyed. Chlorinity was 0.1 - 0.8 p.p.t. Some isopods were found in collecting galleries of springs and in wells in calcarenites and in gravel deposits. These were Proasellus coxalis ssp. with some depigmented specimens, the probably stygobitic P. c. nanus ssp. n., poorly pigmented Jaera italica, and Microcharon luciae n. sp.; they were accompanied by the stygobitic amphipod Bogidiella cypria, by Turbellaria (Tricladida), by Copepoda (Cyclopoida), and rarely by some other animals (Pisidium sp., Oligochaeta). Only slightly depigmented Turbellaria Tricladida (cf. Dugesia sp.) occur in …
Laboratory Studies Of Predatory Behaviour In Two Subspecies Of The Carabid Cave Beetle: Neaphaenops Tellkampfi, David M. Griffith
Laboratory Studies Of Predatory Behaviour In Two Subspecies Of The Carabid Cave Beetle: Neaphaenops Tellkampfi, David M. Griffith
International Journal of Speleology
Comparative studies on the foraging behaviour of Neaphaenops tellkampfi tellkampfi and N. t. meridionalis demonstrated adaptation to different environments. The southern subspecies N. t. meridionalis, which is found in wet muddy caves where cave cricket eggs are unlikely prey, did not locate buried cricket eggs and dug fewer and less accurate holes in the lab than the nominate subspecies. N. t. tellkampfi, which reaches high densities in sandy deep cave environments where cricket eggs are the only viable prey, gained significantly greater weight than meridionalis when presented buried cricket eggs as prey. There was no difference with respect …
Troglobius Coprophagus, A New Genus And Species Of Cave Collembola From Madagascar, With Notes On Its Ecology, José G. Palacios-Vargas, Jane Wilson
Troglobius Coprophagus, A New Genus And Species Of Cave Collembola From Madagascar, With Notes On Its Ecology, José G. Palacios-Vargas, Jane Wilson
International Journal of Speleology
Troglobius coprophagus n. g., n. sp. a cave Collembola from Madagascar is characterized by an elongate and serrate mucro, a non spines dens. Description and illustrations of the new genus and species are given. Some ecological data of this highly cave adapted species is also included.
Neogastropods (Melongenidae, Fasciolariidae, Turridae) From The Cannonball Formation (Paleocene: Thanetian), North Dakota And South Dakota, Brian E. Silfer
Neogastropods (Melongenidae, Fasciolariidae, Turridae) From The Cannonball Formation (Paleocene: Thanetian), North Dakota And South Dakota, Brian E. Silfer
Theses and Dissertations
The Cannonball Formation of Paleocene age is a shallow-marine, clastic sequence exposed primarily in southwest-central North Dakota and northwestern South Dakota. The formation is characterized by alternating, poorly consolidated, relatively thin sandstone and thick mudstone units. The Cannonball neogastropod families Melongenidae, Fasciolariidae, and Turridae contain 20 species assigned to 15 genera based on 334 individuals from 50 localities. Four genera, Alticollarum, Obtusicarina, Vitticoncha, and Ericksonia are new, whereas Serrifusus, Mesorhytis, Rhombopsis, and Deussenia are first reported occurrences from Tertiary strata. Marshallaria is newly reported from North America and likely from the Northern Hemisphere. Twelve species are additions to the Cannonball …
Plantscan, Ted Lefroy, Fritz Droge
Plantscan, Ted Lefroy, Fritz Droge
Natural resources published reports
PLANTSCAN is a network of schools and landholders throughout the wheatbelt of Western Australia. It aims to speed up the process of testing plants for their suitability to this environment.
This kit contains seed of various trees and shrubs and notes on how to grow them, plant them out into a small plot and record their progress.
Schools and landholders throughout the wheatbelt who have purchased this kit become part of a research network aimed at selecting plants that will:
* overcome soil erosion;
* overcome soil salinity;
* and provide a source of income for farmers.
The following sheets …
Salinity And Waterlogging On The Esperance Downs Research Station, D J. Mcfarlane, A T. Ryder
Salinity And Waterlogging On The Esperance Downs Research Station, D J. Mcfarlane, A T. Ryder
Resource management technical reports
Details the situation on the station so that the demonstration and research programs can be designed and the effect of the treatments assessed. Past work on the station has been briefly summarised and the results of geophysical surveys and additional drilling are given. Surveys of electromagnetic terrain conductivities have shown where salinity is most serious at present. The most deeply penetrating method may have identified areas likely to developing salinity in future.
Lithofacies Of The Pliocene Yorktown Formation In The Vicinity Of Kingsmill On The James River, Virginia, Michael David Lawless
Lithofacies Of The Pliocene Yorktown Formation In The Vicinity Of Kingsmill On The James River, Virginia, Michael David Lawless
OES Theses and Dissertations
The Yorktown Formation beds which crop out along the James River in southeastern Virginia near Kingsmill and Carter's Grove are lithologically described in order to compare them with the "typical" Yorktown beds upriver in the area of Fort Boykins, Rushmere, and Cobham Wharf. Thirty-four stratigraphic sections are constructed of the bluffs along the river. The Yorktown beds in the area of Kingsmill and Cobham Wharf are divided into ten lithofacies: the silty sand facies (B), the Chesapecten facies (C), the Glycymeris facies (D), the Chama facies (E), the glauconitic biofragmental sand facies (F), the laminated silty clay facies (G), the …
A Colorado River Basin Authority: Opportunity For Sharing River Basin Management And Resources, David H. Getches
A Colorado River Basin Authority: Opportunity For Sharing River Basin Management And Resources, David H. Getches
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
32 pages.
Contains references.
The Delaware River Basin: Courts, Compacts And Commissions, R. Timothy Weston
The Delaware River Basin: Courts, Compacts And Commissions, R. Timothy Weston
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
112 pages (includes illustrations and 1 map).
Contains references.
Interjurisdictional Relations Under Federal Water Quality Law: A Guide Through The Maze, Michael C. Blumm, Daniel Rohlf
Interjurisdictional Relations Under Federal Water Quality Law: A Guide Through The Maze, Michael C. Blumm, Daniel Rohlf
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
53 pages.
Contains references.
Managing The Upper Rio Grande: Old Institutions, New Players, Steven J. Shupe
Managing The Upper Rio Grande: Old Institutions, New Players, Steven J. Shupe
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
19 pages.
Agenda: Boundaries And Water: Allocation And Use Of A Shared Resource, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Boundaries And Water: Allocation And Use Of A Shared Resource, University Of Colorado Boulder. Natural Resources Law Center
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Lawrence J. MacDonnell and Charles F. Wilkinson.
Boundaries and Water: Allocation and Use of a Shared Resource is the topic of the Center's annual summer program on water this June. Most of the major rivers in the western United States are shared between two or more states. Often tribal governments play an important role in water allocation and use decisions. International considerations also may be involved in some cases. These interjurisdictional issues extend to groundwater as well as surface water.
This conference will provide the …
Interstate Allocation Of The Platte River, J. David Aiken
Interstate Allocation Of The Platte River, J. David Aiken
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
27 pages.
Contains references.
Root Exploitation Of Fertile Soil Microsites, Robert B. Jackson
Root Exploitation Of Fertile Soil Microsites, Robert B. Jackson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Root exploitation of enriched soil microsites was examined for the tussock grasses Agropyron desertorum and Agropyron spicatum and the shrub Artemisia tridentata. Two mechanisms of exploitation of the microsites were examined: root proliferation and changes in nutrient uptake capacity. One day after nutrient solution was applied to small soil patches, the mean relative growth rate of Agropyron desertorum roots in enriched patches was two to four times greater than for roots of the same plants in soil patches treated with distilled water. This rapid and striking root proliferation occurred in response to N-P-K enrichment as well as to P or …
Habitat Use And Diet Analysis Of Breeding Common Barn Owls In Western Nebraska, Joseph A. Gubanyi M.S.
Habitat Use And Diet Analysis Of Breeding Common Barn Owls In Western Nebraska, Joseph A. Gubanyi M.S.
School of Natural Resources: Dissertations, Theses, and Student Research
I studied barn owl (Tyto alba) breeding biology in western Nebraska 1984-1986. I had greatest success capturing males (56% success) at night using trap doors at nest sites and females (91 % success) using hoop nets at nest sites during the day. Barn owls removed 16 of 23 tail-mounted radios. Eight birds were radio-tracked for 7-14.5 hours. The mean foraging range was 198 ha (32- 299 ha, n = 8) with < 1 % overlap among birds from adjacent nest sites. Field-tested telemetry error was high (mean displacements of radio-locations for 2 birds were 208 and 241 m). I found no relationship between percent cover in foraging habitat and reproductive success. I identified 10,140 prey items from 15 nest sites and found both annual and seasonal variation in barn owl diets. Microtus ochrogaster occurred most frequently (32.7%) and increased in the diet from 17.6 to 27.2 to 43.5% 1984-1986. M. ochrogaster and Perognathus hispidus annual frequencies were …
Putting A Top Quality Forage Program Together On Your Farm, Richard Brown Phillips
Putting A Top Quality Forage Program Together On Your Farm, Richard Brown Phillips
Kentucky Alfalfa and Stored Forage Conference
You know most of us here, and I am including myself, really don't have a super talent for predicting the future with a great deal of consistency, however, our interest doesn't have to be in predicting, but rather, just primarily in considering potentials and opportunities in the future. What do you say, let's take a little time to look at some of the opportunities in the forage industry. The nation's No. 1 cash crop.
Alfalfa Hay: Quality Makes The Difference, Garry D. Lacefield
Alfalfa Hay: Quality Makes The Difference, Garry D. Lacefield
Kentucky Alfalfa and Stored Forage Conference
Alfalfa "Queen of the Forage Crops" is one of t.he most important forage legumes grown in the U.S. It can be grown over a wide range of soil and climatic conditions, it has the highest yield potential and the highest feeding values of all adapted perennial forage legumes. Alfalfa is a versatile crop which can be used for pasture, hay, silage, green-chop, soil improvements and human consumption (sprouts, etc.).
Fertilizer Value Of Cattle Dunghills In A Pasture Field, Kenneth L. Wells, Steve D. Davis
Fertilizer Value Of Cattle Dunghills In A Pasture Field, Kenneth L. Wells, Steve D. Davis
Soil Science News and Views
There were nearly 2.5 million cattle and calves in Kentucky in 1988. Most of these were maintained under pastureland conditions. Nutrients taken up by pasture plants, consumed by cattle, and re-cycled back onto fields by fecal and urine excretions can be a major source of nutrients for maintaining pastureland productivity. In order to estimate the value of this under grazing conditions, observations were made on a pasture field in Casey County, Kentucky, following stocking of the field with cattle.
First Dinosaur Fossils From Georgia, With Notes On Additional Cretaceous Vertebrates From The State, David R. Schwimmer
First Dinosaur Fossils From Georgia, With Notes On Additional Cretaceous Vertebrates From The State, David R. Schwimmer
Faculty Bibliography
New Collections of Upper Cretaceous (Campanian) vertebrate fossils from Stewart County, Georgia, contain isolated bones from two dinosaur taxa: a hadrossaur (Ornithischia, Ornithopoda) of undetermined genus, and tyrannosaur (Saurischia, Theropoda) comparable to Albertosaurus. Numerous individuals are represented in the collections. The fossils are found at the upper formational contact of the Blufftown Formation but appear to be redeposited from lower down in the unit. These dinosaur fossils probably represent shore-living or river-transported animals preserved in back-barrier or estuarine pericontinental marine environments of deposition.
Water Quality In Southeastern Minnesota Streams: Observations Along A Gradient Of Land Use And Geology, Nels H. Troelstrup Jr., James A. Perry
Water Quality In Southeastern Minnesota Streams: Observations Along A Gradient Of Land Use And Geology, Nels H. Troelstrup Jr., James A. Perry
Journal of the Minnesota Academy of Science
ABSTRACT-Surface water quality in southeastern Minnesota's driftless area exhibits subregional and local spatial patterns which are highly correlated with subsurface geology and land-use practices. Some variables appear to respond on subregional or watershed scales. Nitrate, specific conductance, alkalinity, and surface water atrazine concentrations were lower in streams originating from the Prairie Du Chien or Jordan sandstone ~quifers of easte:n Fillmore and Houston Counties than those originating from the Galena limestone aquifer m west-central Fillmore County. In addition, the numbers of pollution intolerant and functionally specialized invertebrates in the benthic community were higher in the eastern streams. Gross primary production on …
Nitrogen Management Related To Groundwater Quality In Minnesota, James L. Anderson, Gary L. Malzer, Gyles W. Randall, George W. Rehm
Nitrogen Management Related To Groundwater Quality In Minnesota, James L. Anderson, Gary L. Malzer, Gyles W. Randall, George W. Rehm
Journal of the Minnesota Academy of Science
ABSTRACT-Minnesota ranks fifth in overall fertilizer nitrogen (FN) use. Nitrogen is essential for crop production; however, there are concerns about this use relative to profitability and potential impacts on groundwater. There are many sources and sinks of nitrogen in ecosystems. The impact of agricultural management practices on groundwater requires that all sources and fates be considered before FN rates are determined. Research is underway to evaluate relationships between FN application for continuous com and movement of nitrate through soil profiles. Growers making N management decisions have to be able to evaluate the complex nature of N in the environment when …
Natural And Anthropogenic Forces Acting On A Forest Lake, M. C. Whiteside, M. B. King, K. Pulling
Natural And Anthropogenic Forces Acting On A Forest Lake, M. C. Whiteside, M. B. King, K. Pulling
Journal of the Minnesota Academy of Science
ABS1RACT-Lak~ Itasca, Minnes~ta is located within one of the more popular state parks. Since the turn of the centmy, loggmg, fire protection, and development within the watershed have put modest pressures on the ecosystem. The presence of the University of Minnesota's Biological and Forestry Station on the lake has encouraged research in this region. Consequently there are numerous research reports and papers which are available _at the station's library. We examined data collected over the past 25 years to see if we could detect changes ~~ the lake. We detected no changes in phytoplankton, macrophyte, zooplankton, or zoobenthos com~urnues, but …
Viruses And Drug Resistant Bacteria In Groundwater Of Southeastern Minnesota, Sagar M. Goyal, Daniel Amundson, Robert A. Robinson, Charles P. Gerba
Viruses And Drug Resistant Bacteria In Groundwater Of Southeastern Minnesota, Sagar M. Goyal, Daniel Amundson, Robert A. Robinson, Charles P. Gerba
Journal of the Minnesota Academy of Science
ABSTRACT-Karst topography of soils in southeastern Minnesota is responsible for the formation of sinkholes, subsurface cracks, and underground rivers which may enhance the transportation of surface contaminants into groundwater. The present study was conducted to determine the presence of human pathogenic viruses, coliforms, fecal coliforms and coliphages in private rural wells of this area. The occurrence of drug resistance in bacteria isolated from groundwater also was studied. Coliform bacteria were detected at least once from 22 of the 26 sites sampled over 34 months. Water from 10 sites yielded drug-resistant indicator bacteria; 25 of 38 (65.8 percent) total coliforms and …