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Articles 39241 - 39270 of 39771
Full-Text Articles in Physical Sciences and Mathematics
Fertility Build-Up In Wheatbelt Soils, M D. Carroll
Fertility Build-Up In Wheatbelt Soils, M D. Carroll
Experimental Summaries - Plant Research
Areas of loamy sand from Wongan Hills Research Station, which had carried subterranean clover for varying numbers of years, were sampled at five depth intervals to 60 cm. Wheat yield and a range of soil properties were related to numbers of years under subterranean clover. (W56H)
The Ias Bulletin, V3n1, January 1969, Iowa Academy Of Science
The Ias Bulletin, V3n1, January 1969, Iowa Academy Of Science
IAS Bulletin
"
In this issue:
--- Call for Papers
--- Visiting Scientist Program
--- Speakers' Bureau Directory
--- Special Committee Named
--- State-Wide Articulation Committee Appointed
--- Report fromthe ISTS Short Course Committee
--- Constitution Revision
--- Industrial Support Being Solicited
--- Special Bulletin Going Out to all High School Science Teachers
--- Membership Information
--- Academy Representatives Attend AAAS Convention
--- Proceedings for 1967 and 1968
--- Research Grants Awarded
--- New Section to Appear on the 1969 Program
--- Program Notes from Other Sections
--- Eighty-First Session at Cedar Falls
--- Call for Nominations for Teacher Awards
--- Selected …
Nitrogenous Fertilisers For Cereal Grain Crops Results From 1969 Trials With Wheat, Oats, Barley And Linseed, M G. Mason
Nitrogenous Fertilisers For Cereal Grain Crops Results From 1969 Trials With Wheat, Oats, Barley And Linseed, M G. Mason
Experimental Summaries - Plant Research
69ME3, 66ES8, 66ES8, 69GE1, 69GE4, 69GE2, 61M11, 69M1, 69M2, 69ME7, 69TS3,69TS4, 69M3, 68SG4, 69ME2,69ME4, 68JL1, 68JL7, 68JL4, 68JL10, 68JL6, 68JL12, 69GE3, 69BA1, 69BA2, 69BA3, 69TS2, 69NO3, 69ES3, 69NA3, 67LG18, 69LG2, 69C1, 69C2, 67N3, 69N2, 69NO4, 68TS7, 61WH2, 62WH1, 69WH2, 69WH3, 69MO4, 69WH4, 69N1, 69NO2, 61A2, 69A1, 67ES1, 69ES4, 69BR1, 67ES2, 67ES2, 69E1, 69E2, 69AL1, 69MO2, 69MT1, 69MO3, 69NA2, 69NA4,
Progress In Weed Control, Department Of Agriculture, Western Australia
Progress In Weed Control, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
In May, 1967, the "Journal of Agriculture" printed a special issue on weed control, with the emphasis on chemicals for weed control in cereal crops.
This month, just two years later, enough new information has accumulated to warrant publication of another "theme" issue, this time with important articles on weed control in pastures, chemical firebreaks and chemical ploughing, as well as weed control in linseed and cereal crops.
Pasture Improvement In South Western Australia, J W. Malcolm
Pasture Improvement In South Western Australia, J W. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
"There is no doubt that Australia's enhanced prosperity in the last 30 years has been dependent in no small measure on the use of legume-based pastures." E. M. Hutron, June, 1968. *
THE LAST 30 years have seen an increased interest in pasture improvement which has transformed much of Western Australia. Large areas have been sown to new and improved pasture species—as a result productivity of both livestock and cereal enterprises has risen.
Pastures For The Pastoral Areas, D G. Wilcox, K. Fitzgerald
Pastures For The Pastoral Areas, D G. Wilcox, K. Fitzgerald
Journal of the Department of Agriculture, Western Australia, Series 4
The pastoral areas lie generally outside the zone where cultivated crops are grown.
The rainfall is erratic and the basic pastures for sheep and cattle consist of native plants.
In some favoured areas however, and in particular situations, sown pasture species are becoming increasingly important.
The Use Of Pickled Wheat In Poultry Feeding, P Smetana
The Use Of Pickled Wheat In Poultry Feeding, P Smetana
Journal of the Department of Agriculture, Western Australia, Series 4
FEEDING fungicides to poultry can result in harmful effects, to the birds themselves, and to their human consumers.
To prevent such effects it is advisable that wheat pickled with fungicides should not be included in poultry rations.
Saltland Pastures, C V. Malcolm
Saltland Pastures, C V. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
FOLLOWING THE DEVELOPMENT of Agriculture in Western Australia considerable areas of highly productive land have become salt affected to the degree that normal crops and pastures cannot be grown.*
However, species and establishment methods are available which can bring at least some of this land back into production.
Superphosphate For Wheatbelt Pastures : Rates Of Application, Walter Jacob Cox
Superphosphate For Wheatbelt Pastures : Rates Of Application, Walter Jacob Cox
Journal of the Department of Agriculture, Western Australia, Series 4
BECAUSE Western Australian soils are low in phosphorus, frequent applications of superphosphate are required for both crop and pasture production. The recommended rates are determined from the results of field experiments that test different quantities of super and measure the extra yield.
This article discusses the recommended rates of superphosphate in relation to soil type and superphosphate history. Methods of application and time of topdressing are also discussed.
Promising Results On West Kimberley Pindan Country, A L. Payne
Promising Results On West Kimberley Pindan Country, A L. Payne
Journal of the Department of Agriculture, Western Australia, Series 4
IN the 22 to 28 inch rainfall belt of the West Kimberley area of Western Australia are extensive areas of what is locally known as "pindan" country.
The term "pindan" refers to a light red or yellow sandy soil type supporting scattered Eucalypts, sparse-dense wattle scrub and grasses such as curly spinifex, ribbon grass and native sorghum.
Legumes Or Artificial Nitrogen?, N J. Halse
Legumes Or Artificial Nitrogen?, N J. Halse
Journal of the Department of Agriculture, Western Australia, Series 4
Choosing between legumes and artificial nitrogen is not the problem which many farmers are making it.
This article deals with the choice in the mixed cereal and sheep farms of the Western Australian wheatbelt.
A New Rhinoceros From The Nebraska Miocene, Lloyd G. Tanner
A New Rhinoceros From The Nebraska Miocene, Lloyd G. Tanner
Bulletin of the University of Nebraska State Museum
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 …
Methods Of Distinguishing Larval Alewife (Alosa Pseudoharengus) From Larval Blueback Herring (A Aestivalis), James Ross Chambers
Methods Of Distinguishing Larval Alewife (Alosa Pseudoharengus) From Larval Blueback Herring (A Aestivalis), James Ross Chambers
Dissertations, Theses, and Masters Projects
No abstract provided.
History Of The State Vermin Barrier Fences, Formerly Known As Rabbit Proof Fences, J S. Crawford
History Of The State Vermin Barrier Fences, Formerly Known As Rabbit Proof Fences, J S. Crawford
Research Reports
There is evidence of rabbits arriving in Australia as far back as 1788, and it is well known that others were liberated on islands around the coast, including some off the coast of Western Australia. However, they remained localised and it is now generally accepted that the rabbits which did spread originated from a small shipment of the wild type brought on the Clipper “Lightning” in 1859. They were released on “Barwon Park”, the property of Thomas Austin, near Geelong in Victoria, and within three years, had reached pest proportions
Ammonium Nitrate Vs Urea, M G. Mason
Ammonium Nitrate Vs Urea, M G. Mason
Experimental Summaries - Plant Research
Ammonium nitrate is a source of nitrogen containing half
its nitrogen in the ammonium form and half in the nitrate form.
Some properties are set out in comparison with urea in the
following table.
Ammonium nitrate has an advantage over urea in that it can
be topdressed onto the surface of the soil and left uncovered
without a danger of loss of nitrogen to the atmosphere. When urea
is left uncovered on the surface of the soil losses of nitrogen occur
through volatilisation of ammonia during the hydrolysis of the urea.
Such losses with ammonium nitrate are only likely to …
Honey Plants In Western Australia, F. G. Smith
Honey Plants In Western Australia, F. G. Smith
Bulletins - 3000 - 3999
Successful honey production depends, among other things on a good knowledge of the plants which produce nectar.
Every apiarist needs to know which plants are of importance to honey-bees, where those plants occur, and when they flower. He also needs to know which plants produce nectar which will result in the production of good quality honey, and which produce unpalatable or unmarketable honey. To maintain the strength of his bee colonies he also needs to know which plants produce nutritious pollen.
The object of this bulletin is to provide the basic information on these subjects in the main beekeeping areas …
The Soft Bottom Macrobenthic Community Of Arthur Harbor, Antarctica, James K. Lowry
The Soft Bottom Macrobenthic Community Of Arthur Harbor, Antarctica, James K. Lowry
Dissertations, Theses, and Masters Projects
No abstract provided.
Distribution, Growth And Behavior Of The Spotted Hake In The Chesapeake Bight, Charles A. Barans
Distribution, Growth And Behavior Of The Spotted Hake In The Chesapeake Bight, Charles A. Barans
Dissertations, Theses, and Masters Projects
No abstract provided.
Aspects Of The Ecology, Life History, And Host-Parasite Relationship Of Loxothylacus Panopaei (Sacculinidae) In Chesapeake Bay, Seth Jerome Daugherty
Aspects Of The Ecology, Life History, And Host-Parasite Relationship Of Loxothylacus Panopaei (Sacculinidae) In Chesapeake Bay, Seth Jerome Daugherty
Dissertations, Theses, and Masters Projects
No abstract provided.
Faunal Variation On Pelagic Sargassum, Michael L. Fine
Faunal Variation On Pelagic Sargassum, Michael L. Fine
Dissertations, Theses, and Masters Projects
No abstract provided.
Taxonomy And Distribution Of Western Atlantic Bittium (Gastropoda: Mesogastropoda), Ella May Thomson Wulff
Taxonomy And Distribution Of Western Atlantic Bittium (Gastropoda: Mesogastropoda), Ella May Thomson Wulff
Dissertations, Theses, and Masters Projects
The genus Bittium in the Western Atlantic was studied to determine the number and distribution of extant species. Shells of adults and juveniles collected from Brazil to Canada, including the type specimens of B. virginicum, were examined and compared on the basis of length, lengthwidth ratio and varix presence or absence. Although intergrades of B. alternatum and B. varium probably existed in the middle Chesapeake Bay, along the Atlantic shores of the Delmarva Peninsula and New Jersey, and in western Long Island Sound prior to 1940, B. alternatum is now found from Shark River, New Jersey, northward and B. varium …
The Prairie Naturalist Volume 1, No.4. December 1969
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
Expectation Values Of Simple Correlated Helium-Atom Wavefunctions, Thomas P. Tsien, Russell T. Pack
Expectation Values Of Simple Correlated Helium-Atom Wavefunctions, Thomas P. Tsien, Russell T. Pack
Faculty Publications
In this Note we present the results of a calculation of the expectation values of a number of one- and two electron properties of the ground-state helium atom using two very simple correlated wavefunctions.
The Ias Bulletin, V2n5, November 1968, Iowa Academy Of Science
The Ias Bulletin, V2n5, November 1968, Iowa Academy Of Science
IAS Bulletin
In this issue:
--- Board of Directors Meeting at UNI
--- Visiting Scientist Program to be Revived
--- Speakers Bureau Directory to be Developed
--- Third Articulation Conference Passes Resolution
--- Membership and Dues Information
--- Local Arrangements Committees at Work
--- Academy Representatives to Attend AAAS Convention
--- Research Funds Still Available
--- AAPT Selects New Officers
--- ISTS Notes
--- Participation Form
--- Registration for Inclusion
--- IAS Address Changes and Corrections
Revisions Of Two Subgenera Of Andrena: Micrandrena Ashmead And Derandrena, New Subgenus (Hymenoptera: Apoidea), David O. Ribble
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
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 …
Biological Studies Of Selected Reaches And Tributaries Of The Colorado River, Nelson Thomas, Federal Water Pollution Control Administration
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.
The Prairie Naturalist Volume 1, No. 3. September, 1969
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 …
The Ias Bulletin, V2n4, September 1968, Iowa Academy Of Science
The Ias Bulletin, V2n4, September 1968, Iowa Academy Of Science
IAS Bulletin
In this issue:
--- New Cover for the Bulletin
--- Corrections and Additions to the Membership List
--- 1969 Meetings Scheduled for Cedar Falls
--- IAS Dues Cover the Calendar Year
--- Proceedings for 1966 Ready
--- Academy Board to Meet
--- Fall Meeting AAPT
--- Our New President
--- Committee to Review the Academy Constitution
--- Collins Radio First Corporate Member
--- Professor Margaret Black Honored
--- Third Articulation Conference Scheduled for October 11 and 12 in Fort Dodge
--- Research Funds Available
--- 1967 Articulation Conference Report from Panel on Relations Between Physics and Mathematics
--- Science Teachers …
Two Feather Mite Genera (Analgoidea, Proctophyllodidae) From Birds Of The Families Oxyruncidae And Pipridae (Passeriformes, Tyranni), Warren T. Atyeo, J. Gaud
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
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.
Biometrical Study Of Morphology And Development Of The Pennsylvanian Trilobite Ameura Sangamonensis (Meek And Worthen), Roger K. Pabian, J. A. Fagerstrom
Biometrical Study Of Morphology And Development Of The Pennsylvanian Trilobite Ameura Sangamonensis (Meek And Worthen), Roger K. Pabian, J. A. Fagerstrom
Bulletin of the University of Nebraska State Museum
Biometrical study of morphology and development in a sample of 100 cranidia, 94 pygidia, 26 free cheeks, and 9 complete specimens of the trilobite Ameura sangamonensis (Meek and Worthen) from the Bonner Springs Shale (Pennsylvanian; Missouri Series) in eastern Nebraska indicates that the dominant growth pattern was isometric. Evidence supporting this conclusion consists of rectilinear size relations among eight pairs of cranidial dimensions, three pairs of pygidial dimensions, and three pairs of dimensions of the free cheeks. Qualitative changes in pygidial morphology during development include a progressive decrease in prominence of the border, increasing width of the posterior border relative …