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Articles 19351 - 19380 of 19777

Full-Text Articles in Life Sciences

Microenvironmental Effects Of Erosion Control Treatments On Seedling Survival In A Southeastern Utah Salt Desert Area, Ross W. Wein May 1969

Microenvironmental Effects Of Erosion Control Treatments On Seedling Survival In A Southeastern Utah Salt Desert Area, Ross W. Wein

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study of the microclimate of erosion control treatments was carried out in two habitat types in a semiarid southeastern Utah, salt desert shrub area. The soils are highly eroded Mancos shale and support a low density of salt desert shrub species which offers little protection against high intensity summer convectional rainstorms.

Gully plugs and contour furrows had been installed by the Bureaus of Reclamation and Land Management to prevent runoff of soil laden water which results from these summer rainfalls. Formerly this sediment was carried to the Colorado River and deposited in Lake Powell.

The purpose to t he …


A New Natricine Snake Of The Genus Thamnophis From Northern Mexico, Douglas A. Rossman Mar 1969

A New Natricine Snake Of The Genus Thamnophis From Northern Mexico, Douglas A. Rossman

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.


The Taxonomic Status Of Sturnira Bidens (Chiroptera: Phyllostomidae) With Notes On Its Karyotype And Life History, Alfred L. Gardner, John P. O'Neill Mar 1969

The Taxonomic Status Of Sturnira Bidens (Chiroptera: Phyllostomidae) With Notes On Its Karyotype And Life History, Alfred L. Gardner, John P. O'Neill

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.


A New Species Of Blackbird (Agelaius) From Peru, Lester L. Short Mar 1969

A New Species Of Blackbird (Agelaius) From Peru, Lester L. Short

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.


Distributional Notes On The Birds Of Peru, Including Twelve Species Previously Unreported From The Republic, John P. O'Neill Mar 1969

Distributional Notes On The Birds Of Peru, Including Twelve Species Previously Unreported From The Republic, John P. O'Neill

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.


Nitrogen Fertiliser Survey, Department Of Agriculture, Western Australia Jan 1969

Nitrogen Fertiliser Survey, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

THE DECEMBER, 1968 issue of the "Journal of Agriculture" included, as part of an article on the economics of nitrogen fertiliser use, a lift-out section for farmers to complete and return to the Journal.

In the lift-out, farmers were asked to calculate their fertiliser costs and answer a series of questions about the use of nitrogen on their farms.


Paspalum Vaginatum : For Salty Seepages And Lawns, C V. Malcolm, I. A. F. Laing Jan 1969

Paspalum Vaginatum : For Salty Seepages And Lawns, C V. Malcolm, I. A. F. Laing

Journal of the Department of Agriculture, Western Australia, Series 4

PASPALUM VAGINATUM, aptly termed "sea shore paspalum" has an amazing ability to thrive in wet salty situations. It is also a good lawn grass.

Seed of the grass is not available but it may easily be established by planting pieces.

This article reviews where and how the grass may be used.


Wildflowers Of The Geraldton District, E M. Bennett Jan 1969

Wildflowers Of The Geraldton District, E M. Bennett

Journal of the Department of Agriculture, Western Australia, Series 4

THE wildflowers of Western Australia which have aroused such interest throughout the world are found largely in the south western corner of the State.

Within this area, and indeed in the drier areas also, certain districts are richer than others.

One example of this concentration of wildflowers occurs to the north and east of Geraldton.


The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker Jan 1969

The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker

Aspen Bibliography

No abstract provided.


The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas Jan 1969

The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas

Aspen Bibliography

No abstract provided.


Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight Jan 1969

Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight

Aspen Bibliography

No abstract provided.


Taxonomic And Ecological Study Of A Hillside Marsh, Coles County, Illinois, Hampton M. Parker Jan 1969

Taxonomic And Ecological Study Of A Hillside Marsh, Coles County, Illinois, Hampton M. Parker

Masters Theses

No abstract provided.


Digitaria Adscendens And D. Sanguinalis (Gramineae) In Arkansas, Albert Robinson Jr. Jan 1969

Digitaria Adscendens And D. Sanguinalis (Gramineae) In Arkansas, Albert Robinson Jr.

Journal of the Arkansas Academy of Science

No abstract provided.


Dormancy And Life Span Of Saffron Thistle Seeds, B J. Quinlivan, J. R. Pierce Jan 1969

Dormancy And Life Span Of Saffron Thistle Seeds, B J. Quinlivan, J. R. Pierce

Journal of the Department of Agriculture, Western Australia, Series 4

RESEARCH in the Geraldton area has indicated that seeds of the saffron thistle (Carthamus lanatus) spread their germination over some seven years but most germinate in the first two years.

Factors influencing the rate of germination and the survival of seeds are the depth of burial and the presence of termites in the soil.


Survey Of The Helminth Parasites Of Selected Game Fishes Of Lake Fort Smith, Arkansas, David A. Becker, Walter C. Houghton Jan 1969

Survey Of The Helminth Parasites Of Selected Game Fishes Of Lake Fort Smith, Arkansas, David A. Becker, Walter C. Houghton

Journal of the Arkansas Academy of Science

No abstract provided.


Some Noteworthy Species Of The Arkansas Flora, Gary E. Tucker Jan 1969

Some Noteworthy Species Of The Arkansas Flora, Gary E. Tucker

Journal of the Arkansas Academy of Science

No abstract provided.


Freshwater Algae Of Arkansas, Richard L. Meyer Jan 1969

Freshwater Algae Of Arkansas, Richard L. Meyer

Journal of the Arkansas Academy of Science

No abstract provided.


Survey Of The Arkansas Campanulaceae (Including The Lobeliaceae), Edwin B. Smith Jan 1969

Survey Of The Arkansas Campanulaceae (Including The Lobeliaceae), Edwin B. Smith

Journal of the Arkansas Academy of Science

This paper is a summary of the Campanulaceae of Arkansas, based on the material on file in the University of Arkansas herbarium. A key to the species is included, followed by an alphabetical listing by genus and species of the taxa in the Campanulaceae known to occur in the state. After each taxon, the following information is included in this order: blooming period (as indicated on our material), known distribution in general terms (NW-northwest, E-east, G-general, C- central, etc.), habitat, chromosome number (as reported in Darlington & Wylie, 1955; in the Index to Plant Chromosome Numbers, Vol. I.II, and Supplement; …


Study Of The Herbaceous, Vascular Plants From Selected Sites In Faulkner County, Arkansas, Sara Mills Barnett Jan 1969

Study Of The Herbaceous, Vascular Plants From Selected Sites In Faulkner County, Arkansas, Sara Mills Barnett

Journal of the Arkansas Academy of Science

No abstract provided.


Dardanelle Reservoir Illinois Bayou Embayment Background Survey, Clarence B. Sinclair Jan 1969

Dardanelle Reservoir Illinois Bayou Embayment Background Survey, Clarence B. Sinclair

Journal of the Arkansas Academy of Science

No abstract provided.


Successional Patterns In Diverted Croplands Of Crawford County, Illinois, Norman Tracy Jan 1969

Successional Patterns In Diverted Croplands Of Crawford County, Illinois, Norman Tracy

Masters Theses

No abstract provided.


A New Rhinoceros From The Nebraska Miocene, Lloyd G. Tanner Jan 1969

A New Rhinoceros From The Nebraska Miocene, Lloyd G. Tanner

Bulletin of the University of Nebraska State Museum (1924–2023)

A new species of rhinoceros, Menoceras marslandensis, is here proposed. It is based upon a nearly complete skull from the upper part of the Marsland Formation, Hemingford Group (Miocene), of Box Butte County, Nebraska. The new species was probably derived from Menoceras arikarense (Barbour), collected from the Agate Springs Quarries (Arikaree Group, Harrison Formation) of Sioux County, Nebraska, with which both Diceratherium niobrarensis Peterson and D. cooki Peterson are likely synonymous. From Menoceras arikarense, the presumed ancestral stock, Menoceras marslandensis differs in possessing the following characters: (1) very long, fused but slightly cleft, nasals, with flattened, rugose areas …


The Prairie Naturalist Volume 1, No.4. December 1969 Dec 1968

The Prairie Naturalist Volume 1, No.4. December 1969

The Prairie Naturalist

EDITORIAL: Restoring Beauty to the Human Environment ▪ Paul B. Kannowski

A REQUIEM FOR THE PRAIRIE ▪ Hugh H. Iltis

BIRDING IN MY BACK YARD ▪ Mrs. George A. Anderson

OCCURRENCE OF THE CECROPIA AND ROCKY MOUNTAIN SILK MOTHS IN SOUTHWESTERN NORTH DAKOTA ▪ James Oberfoell


"The Population Explosion And Ecology", Paul R. Ehrlich Nov 1968

"The Population Explosion And Ecology", Paul R. Ehrlich

Special Collections: Oregon Public Speakers

No abstract provided.


Biological Studies Of Selected Reaches And Tributaries Of The Colorado River, Nelson Thomas, Federal Water Pollution Control Administration Oct 1968

Biological Studies Of Selected Reaches And Tributaries Of The Colorado River, Nelson Thomas, Federal Water Pollution Control Administration

Publications (WR)

This report fulfills the request of the Colorado River Basin Project, Denver, Colorado, to determine the effects of municipal and industrial wastes on the aquatic life in selected waters of the Colorado River Basin. These studies were conducted with the assistance of personnel from the Colorado River Basin Project.


Revisions Of Two Subgenera Of Andrena: Micrandrena Ashmead And Derandrena, New Subgenus (Hymenoptera: Apoidea), David O. Ribble Oct 1968

Revisions Of Two Subgenera Of Andrena: Micrandrena Ashmead And Derandrena, New Subgenus (Hymenoptera: Apoidea), David O. Ribble

Bulletin of the University of Nebraska State Museum (1924–2023)

This paper is a monographic revision of the bee subgenera Micrandrena Ashmead and Derandrena, new subgenus, of the genus Andrena in North America. Both subgenera occur in the New World and Micrandrena also occurs in the Old World. Twenty-eight species are treated, of which twelve are new: Andrena (Micrandrena) annectens, ishii, labergei, lamelliterga, lepidii, micheneri, Andrena (Derandrena) arctostaphylae, californiensis, hermosa, murietae, penutiani, viridissima. Thirteen names are placed in synonymy: Andrena semotula Cockerell with candidiformis Viereck and Cockerell; subtilicornis Viereck, nitidicornis Cockerell, chlorogaster nesiotes Timberlake, chlorogaster gavilanica Timberlake, radialis Timberlake, catalinica Cockerell with chlorogaster Viereck; vegana Viereck and Cockerell with illinoiensis …


The Prairie Naturalist Volume 1, No. 3. September, 1969 Sep 1968

The Prairie Naturalist Volume 1, No. 3. September, 1969

The Prairie Naturalist

EDITORIAL: A VOICE FOR CONSERVATION ▪ Paul B. Kannowski

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1968 ▪ Robert N. Randall

SOME ENVIRONMENTAL MANAGEMENT PROBLEMS AND PROPOSED SOLUTIONS ▪ Laurence R. Jahn

SOME PLANTS OF WESTERN MINNESOTA ▪ O. A. Stevens

MORTALITY OF MIGRATORY BIRDS AT GRAND FORKS, NORTH DAKOTA FOLLOWING A MOSQUITO CONTROL OPERATION IN MAY, 1969 ▪ Robert W. Seabloom, Lewis W. Oring and James R. Reilly

NESTING OF THE UPLAND PLOVER ON THE MISSOURI COTEAU ▪ K. F. Higgins, H. F. Duebbert and R. B. Oetting

NOTE

Albino sparrows discovered at Hazen, North Dakota ▪ Larry L. Kruckenberg and …


Geographic Variation In Dicamptodon Ensatus (Eschscholtz) With Notes On Life History And Zoogeography, Ronald A. Nussbaum Jul 1968

Geographic Variation In Dicamptodon Ensatus (Eschscholtz) With Notes On Life History And Zoogeography, Ronald A. Nussbaum

All Master's Theses

The purpose of this paper is to present information concerning geographic variation between three northern populations of Dicamptodon, and to add to the meager store of information concerning the life history and biology of the species.


The Genera And Species Of The Feather Mite Subfamily Trouessartinae Except Trouessartia (Acarina: Proctophyllodidae), Kenneth R. Orwig Jun 1968

The Genera And Species Of The Feather Mite Subfamily Trouessartinae Except Trouessartia (Acarina: Proctophyllodidae), Kenneth R. Orwig

Bulletin of the University of Nebraska State Museum (1924–2023)

A systematic study of the acarine subfamily Trouessartinae (except Trouessartia) of the family Proctophyllodidae is presented. Diagnoses are given for the subfamily, five named genera and four new genera. The named genera and their type species are: Allanalges Trouessart, 1886, A. podagricus (Trouessart), 1886; Calcealges Gaud, 1952, C. cyathoplax Gaud, 1952; Hemicalcealges Gaud and Mouchet, 1957, H. margaropygus (Gaud and Mouchet), 1957; Pseudalges Radford, 1950, Proctophyllodes (Pterocolus) analgoides Trouessart, 1885; and Trouessartia Canestrini, 1899, Dermaleichus corvinus Koch, 1840. New genera and their type species are: Arthrogynalges, A. biovoidatus, new species; Bicentralges, B. orientalis, new species; Neocalcealges, N. inattditus, new species; …


Two Feather Mite Genera (Analgoidea, Proctophyllodidae) From Birds Of The Families Oxyruncidae And Pipridae (Passeriformes, Tyranni), Warren T. Atyeo, J. Gaud Jun 1968

Two Feather Mite Genera (Analgoidea, Proctophyllodidae) From Birds Of The Families Oxyruncidae And Pipridae (Passeriformes, Tyranni), Warren T. Atyeo, J. Gaud

Bulletin of the University of Nebraska State Museum (1924–2023)

The genus Hemipterodectes Berla is redefined and the type species, H. squalocauda is figured. A new genus, Diproctophyllodes (type species, Proctophyllodes (Alloptes) dielytra Trouessert, 1885) is described; D. exquisita (Berla), 1959 is synomized with D. dielytra; and D. oxyrunci, new species, is described.