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Articles 56791 - 56820 of 59547
Full-Text Articles in Entire DC Network
1975 Trials On Doublegee, D J. Gilbey
1975 Trials On Doublegee, D J. Gilbey
Experimental Summaries - Plant Research
75A16, 75A17, 75C13, 75MO36, 75MO37, 75WH21, 75WH22. Biological control of doublegee.
1975 Clover Scorch, D. L. Chatel
1975 Clover Scorch, D. L. Chatel
Experimental Summaries - Plant Research
(Feb 1976) This report covers the three major clover scorch activities for the year: A) The tolerance screening at Denmark. B) The dry matter production in the second year of a mowing trial, in which clovers with and without scorch were compared the previous year. C) A summary of the first four years of a disease incidence survey - and an examination of some meteorological factors in relation to disease development. The first two were done jointly with Dr C.M. Francis. The following tentative hypotheses are advanced to explain the regional differences in the distribution of clover scorch: a) The …
1975 Lupin Diseases, P M. Wood
1975 Lupin Diseases, P M. Wood
Experimental Summaries - Plant Research
Sclerotinia stem rot, a fungal disease, is becoming increasingly important. This disease can attack the stem at any point from the stem base to the first laterals. Lodging can result if the canker is severe enough. Superficial cankers can disrupt sap flow resulting in poorly filled pods. The fungicide Benlate is used overseas to control Sclerotinia in bean plantings, Accordingly, a fungicide trial was planned to estimate yield losses resulting from Sclerotinia infection. A secondary aim was to examine any yield response which could be attributed to reported growth promoting properties of benomyl - 75MT33. Brown spot of lupins - …
1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel
1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel
Experimental Summaries - Plant Research
(January 1976) LIST OF EXPERIMENTS 1. The effect of cobalt and seed inoculation on Unicrop lupins. GREEN RANGE 2. The effect of cobalt and seed inoculation on Unicrop lupins. BRAMLEY RESEARCH STATION 3. The effect of cobalt and seed inoculation on Unicrop lupins. McALINDEN 4. The effect; of cobalt and seed inoculation on Unicrop lupins. CHOWERUP 5. The effect of cobalt and seed inoculation on Unicrop lupins. ALANO OKA 6. The effect of cobalt and seed inoculation on Unicrop lupins. LANCELIN 7. The effect of inoculation on Uni crop lupins. KATANNING 8. The effect of inoculation on Uni crop lupins. …
Calico Rock Sandstone Member Of The Everton Formation (Ordovician), Northern Arkansas, Raymond W. Suhm
Calico Rock Sandstone Member Of The Everton Formation (Ordovician), Northern Arkansas, Raymond W. Suhm
Journal of the Arkansas Academy of Science
Surface and subsurface stratigraphic studies in northeastern Arkansas show the Calico Rock Sandstone (Middle Ordovician) to be a lobate sand body up to 200 ft thick. The environment of deposition is considered from a study of grain characteristics, ripple marks, subjacent and superjacent units and unpublished isopachous maps. The data indicate the Calico Rock Sandstone formed in a transgressing Everton sea as a barrier island and near shore sand complex. The quartz sand was derived from a northern source and was distributed by southwestward flowing longshore currents.
Tertiary Welded Tuffs Of The Ryan Spring Area, Needle Range, Beaver County, Utah, Peter Carlyle Rauch
Tertiary Welded Tuffs Of The Ryan Spring Area, Needle Range, Beaver County, Utah, Peter Carlyle Rauch
Masters Theses
"The Needle Range of southwestern Utah is composed of Paleozoic sediments overlain by a thick sequence of Tertiary volcanic rocks primarily of the welded tuff class. The area has undergone at least four stages of post-eruptive structural deformation. The most significant stage is that which formed the range by normal Basin and Range type faulting. The faults strike northwest and tilt the volcanic layers northeast.
The volcanic section is composed primarily of the Needles Range Formation (Oligocene) overlain by the Isom Formation and underlain by several flows and ash flows, one of which has been tentatively correlated to the Escalante …
A Study Of Middle To Late Quaternary Sediments In The Karst Trap., David Lewis Rath
A Study Of Middle To Late Quaternary Sediments In The Karst Trap., David Lewis Rath
Masters Theses
"Quaternary deposits preserved in a karst trap on the Lebanon uplands a e described. The sediments represent the Yarmouthian, Illinoian, Sangamonian, and Wisconsinan Stages. The karst trap is pre-Yarmouthian in age. The lowermost deposit consists of residual fill material on which lies a well-developed Yarmouth paleosol. During the Illinoian Stage about 61 cm (2 feet) of Loveland loess was deposited over the area. Toward late Illinoian conditions favoring erosion rapidly filled the closed system, stripping the loess and reducing the residual slopes. The system stabilized during the Sangamonian Stage allowing for a thick, strong Sangamon paleosol to deve lop on …
Fluid Inclusion Geothermometry Of Tri-State Sphalerite, Chi-Sheng Wei
Fluid Inclusion Geothermometry Of Tri-State Sphalerite, Chi-Sheng Wei
Masters Theses
"Fluid inclusions in successively deposited generations of sphalerite from the Tri-State district have been examined for geothermometry as a function of time. The main stage of vug-filling sphalerite has been studied most intensively and as many as 83 fluid inclusions have been examined in a single crystal. These sphalerite crystals are commonly zoned, and their filling temperatures exhibit a general pattern of declining temperature from their cores outward, from about 135°C down to 90°C. The decline is not a steady one, but rather it is characterized by fluctuations commonly about 15-20°C. Some fluctuations have magnitudes as great as 50-60°C, with …
Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus
Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus
Masters Theses
"In order to determine the extent of possible heavy metal contamination, more than 963 samples of leaf litter and soil were collected from 410 sample stations around the AMAX smelter in southeast Missouri. Dried samples of leaf litter and minus 80 mesh soil fractions were analyzed for cadmium, copper, lead, and zinc by atomic absorption spectrophotometry. Minus 80 mesh soil fractions were also analyzed for sulfur using x-ray fluorescence methods. Ranges of heavy metal concentrations in leaf litter were: cadmium, 0.13 μg/g to 175 μg/g; copper, 4.2 μg/g to 6500 μg/g; lead, 50 μg/g to 130,000 μg/g; and zinc, 26 …
Geochemical And Biogeochemical Studies In The Hansonburg Mining District, New Mexico, Alan Nathan Silverman
Geochemical And Biogeochemical Studies In The Hansonburg Mining District, New Mexico, Alan Nathan Silverman
Masters Theses
"The Hansonburg mining district is in Socorro county in south central New Mexico. A Paleozoic section of thick Pennsylvanian limestone units, thin shale and arkose layers and thick Permian units of sandstone, siltstone and gypsiferous beds interlayered with thin limestone units unconformably overlie a Precambrian basement of granite. The sedimentary rocks are folded with north trends and plunges. Northerly, some easterly and northwesterly trending faults cut the folds. Galena, fluorite, and barite mineralization occurs along some of the northerly faults and as bedded replacements and fissure fillings in the Pennsylvanian Council Spring limestone.
Geological mapping and geochemical soil surveys of …
Classification Of Surficial Materials, James Hadley Williams
Classification Of Surficial Materials, James Hadley Williams
Doctoral Dissertations
"A surficial materials classification system has been designed to fit the needs of a geologist in mapping and classifying surficial materials. The system developed in this study is intended primarily for analysis of surficial materials where time-stratigraphic markers are not applicable or recognized. Primary classification is based on fabric and mode of origin supplemented by data on engineering and pedologic properties.
Several types of classification systems presently exist for use in soil investigations. Only three of these systems have found widespread acceptance, two serving the engineering profession and the other the needs of the soil scientist. These systems are not …
Contribution Á L'Étude Des Zonitidae (Gastropoda) Cavernicoles Et Endogés De Roumanie, Alexandrina Negrea
Contribution Á L'Étude Des Zonitidae (Gastropoda) Cavernicoles Et Endogés De Roumanie, Alexandrina Negrea
International Journal of Speleology
This paper is a contribution to the study of the species of cavernicolous and endogean Zonitidae from Romania. For each of the 24 species belonging to 6 genera we present the geographical distribution, their relation to the country’s territory and data concerning the morphological characteristics, the genital apparatus included. The paper ends with a short faunistic, zoogeographical and ecological analysis.
Analysis Of Rocks And Minerals By Attenuated Total Reflection With Atlas, Donald Franklin Anderson
Analysis Of Rocks And Minerals By Attenuated Total Reflection With Atlas, Donald Franklin Anderson
University of the Pacific Theses and Dissertations
Routine non-destructive analyses of rocks and minerals in slab or powder form maybe practicable by the application of the technique of attenuated total reflection [ATR] in infrared [IR] spectrophotometry.
An atlas of spectra would serve the analytical chemist and geologist, who in turn would serve the miner, the lapidarist, and other groups interested in rocks and minerals.
No effort has been made to produce an atlas of spectra of rocks and minerals by ATR. No ATR spectra of rocks and minerals were found in the literature. The history of ATR indicates that it is still in its early stages of …
A Study Of Some Petrologic And Structural Aspects Of The East Dover Ultramafic Bodies, South Central Vermont, Mark Allen Hoffman
A Study Of Some Petrologic And Structural Aspects Of The East Dover Ultramafic Bodies, South Central Vermont, Mark Allen Hoffman
Geology Theses and Dissertations
INTRODUCTION (pp.1-4)
Mineralogical, textural and chemical changes of ultramafic rocks in response to regional deformation and metamorphism are, at best, imperfectly known (Miyashiro, 1973, p. 30). In Vermont, which has an extremely prominent and well-exposed belt of ultramafics (fig. 1), investigation of these rocks has largely been directed toward such processes as serpentinization, steatitization, and the formation of metasomatic zones at the contacts with country rocks. With few exceptions, there is a lack of detailed descriptions of regional metamorphic textures, mineralogy, and structures developed in the Vermont ultramafic rocks. It is the main purpose of this thesis to describe the …
Structural Studies In The Mafic And Ultramafic Rocks Of The Lewis Hills, Western Newfoundland, Jeffrey A. Karson
Structural Studies In The Mafic And Ultramafic Rocks Of The Lewis Hills, Western Newfoundland, Jeffrey A. Karson
Geology Theses and Dissertations
Table of contents:
CHAPTER I. INTRODUCTION
CHAPTER II. REGIONAL GEOLOGY
CHAPTER III. THE LEWIS HILLS COMPARED TO THE NORTHERN AREAS OF THE BAY OF ISLAND COMPLEX
CHAPTER IV. PETROGRAPHY
CHAPTER V. STRUCTURAL GEOLOGY
CHAPTER VI. SUMMARY, CONCLUSIONS, AND SPECULATIONS
BIBLIOGRAPHY
APPENDIX I. CONTOURED STEREOGRAPHIC PROJECTIONS OF FOLIATIONS AND LINEATIONS IN THE HINES POND AREA
Structural Studies In The Moretown And Cram Hill Units Near Ludlow, Vermont, William J. Gregg
Structural Studies In The Moretown And Cram Hill Units Near Ludlow, Vermont, William J. Gregg
Geology Theses and Dissertations
The geology of the eastern limb of the Green Mountain Anticlinorium consists of a series of Paleozoic metasedimentary rocks with lithologic boundaries arranged in a remarkably straight trend approximately parallel to the axis of the Green Mountains. Published reports of the area, consisting largely of reconnaissance mapping, have treated this complex series of polyphase deformed rocks as an essentially upright autocthonous sedimentary sequence. Boundaries between rock units have, for the most part, been assumed to be primary in origin, as have various structural elements within the rock units. More recent work in selected areas within the Ludlow Quadrangle has revealed …
Nebraska Groundwater Level (Decline & Rise), 1975
Nebraska Groundwater Level (Decline & Rise), 1975
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Location Of Registered Irrigation Wells In Nebraska As Of 1975
Location Of Registered Irrigation Wells In Nebraska As Of 1975
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Stratigraphy Of Offshore Sediment Of Lake Agassiz, North Dakota, Michael B. Arndt
Stratigraphy Of Offshore Sediment Of Lake Agassiz, North Dakota, Michael B. Arndt
Theses and Dissertations
Lake Agassiz occupied the Red River Valley between about 13,800 and 9,000 years ago. The Late Wisconsinan ice sheet that covered the Red River Valley retreated far enough to expose the drainage divide in northern South Dakota and south-central Minnesota sometime after 14,000 B.P. and meltwater ponded behind this divide in Richland County. Before 13,800 the ice readvanced over this area and then retreated again. As the ice margin retreated northward, deposition of the Argusville and Wylie Formations took place. Sometime before 12,800 the ice advanced again into the Red River Valley as far as Traill County; the terminus of …
Natural Science Of The Great Plains As It Relates To The American Indian : A Syllabus And Sourcebook, Mary E. Bluemle
Natural Science Of The Great Plains As It Relates To The American Indian : A Syllabus And Sourcebook, Mary E. Bluemle
Theses and Dissertations
This dissertation, which includes a sourcebook of pertinent reference materials, sample lesson plans, and natural science roadlogs, is an initial attempt at providing an Indian Studies field course in natural science. It also includes a syllabus which stresses natural science processes and serves as a unifying factor for field work, lecture, and course discussions. The dissertation stresses geographical and ecological concepts, climatic and geological processes, and the natural habitats of North Dakota. It includes discussions of North Dakota vertebrates and early man and his relation to his environment; discussions of_ the geologic features, geologic history, vegetation and animal life of …
Geology Of The North Beulah, Center, And Glenharold Lignite Mines In Mercer And Oliver Counties, Southwestern North Dakota, Roy E. Kulland
Geology Of The North Beulah, Center, And Glenharold Lignite Mines In Mercer And Oliver Counties, Southwestern North Dakota, Roy E. Kulland
Theses and Dissertations
The geology of the North Beulah, Center, and Glenharold lignite mines in Mercer and Oliver Counties, southwestern North Dakota, were examined. Stratigraphically, all mines lie within the Sentinel Butte Formation. The North Beulah Mine lies 70 m below the top of the Sentinel Butte Formation and the Center and Glenharold Mines lie about 80 m above the base of the Tongue River Formation.
Four sedimentary types are recognized arid common to all mines; these are: silt and clay, silty sand, sand, and lignite. The silt and clay were deposited in floodbasins and shallow lakes occupying the lowest parts of the …
The Persian And Arabic Destructions Of Caesarea Maritima: The Historical And Stratigraphical Data, Sarah Eleanor Sypher
The Persian And Arabic Destructions Of Caesarea Maritima: The Historical And Stratigraphical Data, Sarah Eleanor Sypher
Theses and Dissertations (Comprehensive)
This thesis presents the historical and stratigraphical evidence for the Persian and Arabic destructions of Caesarea Maritima. Its main purpose is to discover whether the stratigraphical data coincides with the historical information concerning the city in the sixth and seventh centuries A.D.
The archaeological data are the results of four seasons of excavation (1971, 1972, 1973, 1974) carried out by the Joint Expedition to Caesarea Maritima under the direction of Dr. R.J. Bull, Drew University, Madison, N.J. It is supported by a consortium of twenty-one Colleges, Seminaries, and Universities, including Wilfrid Laurier University, and is sponsored by the Albright Institute …
Un Parajapygidé Inédit Des Plages De La Côte Caraïbe De Cuba Récolté Par Mr. L. Botosaneanu Au Cours De La Seconde Expédition Biospéléologique Cubano-Roumaine À Cuba En 1973, J. Pages
International Journal of Speleology
P. (P.) botosaneanui n.sp. has been collected in the interstitial habitat of the Caribbean shores on the eastern coast of Cuba. This note is divided into 6 parts: 1) the description by L. Botusaneanu of the stations where this species has been collected and data on the possibility for the specimens of this taxa to swim and to creep between the grains of sand; 2) the description and the affinities of the n. sp., which is closely related to bonetianus Silv. from Mexico; 3) the study of the male genitalia made possible the definition of 4 instars (male 1 to …
The Ecology Of A Predaceous Troglobitic Beetle, Neaphaenops Tellkampfii (Coleoptera: Carabidae, Trechinae) Ii. Adult Seasonality, Feeding And Recruitment, Russell M. Norton, Thomas C. Kane, Thomas L. Poulson
The Ecology Of A Predaceous Troglobitic Beetle, Neaphaenops Tellkampfii (Coleoptera: Carabidae, Trechinae) Ii. Adult Seasonality, Feeding And Recruitment, Russell M. Norton, Thomas C. Kane, Thomas L. Poulson
International Journal of Speleology
In deep cave areas with loose substrate and sufficient moisture, the life history of Neaphaenops tellkampfii (Coleoptera: Carabidae, Trechinae) is synchronized with the seasonal pattern of its primary food sources, the eggs and first instar nymphs of the cave cricket Hadenoecus subterraneus (Orthoptera Gryllacridoidea, Rhaphidophoridae). Neaphaenops reproduction coincides with an order of magnitude increase in Hadenoecus egg input in the spring. Our 46 observations of predation by Neaphaenops suggest some switching to other cave animals as cricket egg and first instar nymph densities decrease during the summer. Neaphaenops life history in areas of Hadenoecus egg input is as follows: (1) …
The Life Cycle Of A Kentucky Cave Beetle, Ptomaphagus Hirtus, (Coleoptera; Leiodidae; Catopinae), Stewart B. Peck
The Life Cycle Of A Kentucky Cave Beetle, Ptomaphagus Hirtus, (Coleoptera; Leiodidae; Catopinae), Stewart B. Peck
International Journal of Speleology
Ptomaphagus hirtus has been successfully kept in laboratory culture at 12.5°C with food in surplus at all times. Eggs hatched in 18.5 days. Three larval instars were present, which had a total larval life span of 42 days. The pupal stage lasted 32 days. Adult males and adult females had average life spans of 2.2 years and 1.6 years respectively. Maximum adult longevity was 4.2 years. Females reached reproductive maturity a month after eclosion, young and old females produced one egg every 3.5 and 3.8 days respectively, and were reproductively active for as long as 2.5 years. Compared to European …
Distribution Of Indiana Cavernicolous Crayfishes And Their Ecto-Commensal Ostracods, H. H. Hobbs Iii
Distribution Of Indiana Cavernicolous Crayfishes And Their Ecto-Commensal Ostracods, H. H. Hobbs Iii
International Journal of Speleology
Six species and subspecies of crayfishes and four species of entocytherid ostracods are known to inhabit the subterranean streams of southern Indiana. Cambarus (E.) Iaevis (troglophile) appears to be the most widely distributed crayfish and occurs in both karst areas within the State. The troglobite, Orconectes inermis (2 subspecies), is restricted to the larger karst area in solution cavities of Mississippian carbonate rocks. The remaining crayfishes, Orconectes immunis, Orconectes propinquus and Orconectes sloanii, are not common inhabitants of cave waters and are probably trogloxenes. All of the crayfishes except O. sloanii were found to host at least one …
Observations Sur La Biologie De Stenasellus Virei (Crustacea Isopoda Asellota Des Caux Souterraines), Guy Magniez
Observations Sur La Biologie De Stenasellus Virei (Crustacea Isopoda Asellota Des Caux Souterraines), Guy Magniez
International Journal of Speleology
St. virei has been bred in the laboratory for many years (1960-1974). Most of the St.v.hussoni were captured in karstic waters, near the Moulis subterranean laboratory. Some St.v.virei from the Padirac sink-hole; St.v.buchneri from Cantabrian caves; St.v.boui and St.v.virei from phreatic waters; and St.buili and St.breuili have also been bred. Since Stenasellids are unable to swim, very low aquariums are used, with a bed of cave clay, some calcareous stones, dead wood and dead elm tree leaves. Little depth of water is necessary. Stenasellus was originally carnivorous, being able to capture and devour living prey, such as Chironomid larvae, but …
Remplissages Karstiques Au Tunnel De La Clusette, Jean Meia, Michel Pochon
Remplissages Karstiques Au Tunnel De La Clusette, Jean Meia, Michel Pochon
International Journal of Speleology
The piercing of a road tunnel in the flank of a limestone (Malm) anticline in the Neuchâtel Jura uncovered karstic forms transformed for the most part, by decarbonated soils. Mineralogical analysis of these latter, through the use of X-ray diffraction, reveals a great analogy with the surface soils. At more than 200 meters depth, the same allochtone mineralogical suite of aeolian origin which constitutes the largest part of the soils of the High Jura Mountains in Switzerland, is found: an abundance of ferriferous chlorite, and of quartz, plagioclase and potassic feldspar. The various factors favouring this deep infiltration are discussed.
Chronologie Du Développement Et Évolution Du Stockage De Calcium Et Des Cellules À Urates Chez Niphargus Schellenbergi Karaman, François Graf, Philippe Michaut
Chronologie Du Développement Et Évolution Du Stockage De Calcium Et Des Cellules À Urates Chez Niphargus Schellenbergi Karaman, François Graf, Philippe Michaut
International Journal of Speleology
The intra-marsupial development of Niphargus schellenbergi is divided into three phases: within the chorion, embryonic intermoult and juvenile intermoult. The disappearance of the chorion divides the first phase from the second. A double exuviation exists between the last two. The chronology of the embryonic development and of the beginning of post-embryonic development is established. On hatching the juvenile N. schellenbergi has one pair of hepatopancreatic caeca. During the first post-embryonic intermoults the ventral hepatopancreatic caeca, posterior caeca and anterior caecum are formed. The relation between posterior caeca and the aorta is described. The study of calcium storage before moulting showed …
Quaternary Geology Of The Southern Part Of The Grand Forks And Bemidji Quadrangles, Donald K. Sackreiter
Quaternary Geology Of The Southern Part Of The Grand Forks And Bemidji Quadrangles, Donald K. Sackreiter
Theses and Dissertations
Northwestern Minnesota is an area at the southwestern edge of the Canadian Shield that is mantled by thick Pleistocene sediment. The Pleistocene material included a variety of glacial, shoreline, offshore, fluvial, and eolian sediment.
The lithology of the glacial sediment reflects the rock and sediment over which the depositing glacier flowed. Glaciers that advanced from the northeast (Canadian Shield) deposited sandy, granitic-rich material. Glaciers that advanced from the north· (Manitoba Lowland) deposited loamy, calcareous-rich material. Glaciers that advanced from the northwest (eastern North Dakota and southwestern Manitobal deposited clayey, shale-ridt material. A variety of fluvial and lacustrine sediments are typically …