Digital Commons Network^™

Interaction Between A Fossorial Rodent (The Pocket Gopher, Thomomys Bottae) And A Desert Plant Community, R. E. Dingman, L. Byers

Memorandum

No abstract provided.

Effect Of Density On The Population Dynamics Of Perognathus Formosus And Its Relationships Within A Desert Ecosystem, R. M. Chew

Memorandum

No abstract provided.

Factors Affecting Seed Reserves In The Soil Of A Desert Ecosystem, R. M. Chew, J. F. Nelson

Memorandum

No abstract provided.

Impact Of Seed Consumers Desert Biome, M. Bryant, D.J. Depree, S. Dick-Peddie, P. Hamilton, W.G. Whitford

Progress reports

No abstract provided.

Plant Food Preferences Of Two Sympatric Rodents And Their Potential Impact On A Great Basin Shrub Community, E.L. Becker Ii, D.F. Balph

Progress reports

No abstract provided.

Programming Phase Of Water Response Ecosystem Model: V. Annual Plant Submodel, B. J. Gilbert

Progress reports

No abstract provided.

Conceptualization And Early Development Of A Water Response Ecosystem Model, D. C. Wilkin, P. W. Lommen, J. V. Robinson, G. S. Innis

Progress reports

No abstract provided.

Data Search For Aquatic Model, J. Perry Ii, G. W. Minshall

Progress reports

No abstract provided.

Further Development Of A Stream Ecosystem Model, J. H. Wlosinski, G. W. Minshall

Progress reports

No abstract provided.

Impact Of Seed Consumers In A Desert Ecosystem, W. C. Whiteford

Progress reports

No abstract provided.

Interaction Between A Fossorial Rodent (The Pocket Gopher, Thomomys Bottae) And A Desert Plant Community, R. E. Dingman, L. Byers

Progress reports

No abstract provided.

Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman

Progress reports

No abstract provided.

Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman

Progress reports

No abstract provided.

Factors Affecting Seed Reserves In The Soil Of A Desert Ecosystem, R. M. Chew, J. F. Nelson

Progress reports

No abstract provided.

Recommendations For Management Of Sharp-Tailed Grouse In The Nebraska Sandhills, Leonard H. Sisson

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

Research was conducted on sharp-tailed grouse in the Nebraska Sand Hills from 1958 through 1973. The purpose of the study was to obtain information and develop techniques necessary for effective management of the species. Habitat requirements, population dynamics, mobility, food habits and census methods were investigated. Results of the study were reported by Sisson (1975). On the basis of these results, recommendations on habitat management and spring population surveys were developed.

A Survey Of Land Suitable For Townsville Stylo In The North Kimberley Of W.A. 1973, A Kubicki, J. Beer

Books & book chapters

The aims of the survey were to -

(a) define the extent and actual location of country suitable for the production of non-indigenous pastures; in particular to classify the land for its suitability for Townsville stylo (Styioaanthes hurniiia).

(b) map the areas so defined on a land system basis.

The area surveyed covered approximately 88 000 sq.km (33 968 sq.miles) and included most of the catchments of the Carson, Drysdale, King Edward, Prince Regent, Charnley, Isdell and Chapman Rivers. It covered the country between latitude 14°S and 17°S and longitude 124°30'E and 127°30'E.

Nitrogenous Fertilisers For Cereal Production, M G. Mason

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

Among the many factors influencing crop response to nitrogen applications, the most important are the season, soil type, paddock history, time of application and source of nitrogen. Before deciding whether to use nitrogen on a cereal crop, which source to use and at what rate, the farmer needs some understanding of how these factors work.

Middle And Late Cenozoic Tapirs From Nebraska, C. Bertrand Schultz, Larry D. Martin, R. George Corner

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

The distribution and evolution of Late Cenozoic tapirs are discussed and the forms present in Nebraska are reported. Two new species are described from the Ogallala Pliocene of Nebraska, ?Tapirus johnsoni and ?T. simpsoni. Tapirs are known in Nebraska from the Early Oligocene through the Middle Pleistocene. The northern limit of the distribution of the tapirs contracts gradually southward in North America throughout the Tertiary, and even during the Pleistocene interglacials Nebraska must have been near the northern limit of their range.

Stratigraphic Occurrences Of Teleoceras With A New Kimballianspecies From Nebraska, Lloyd G. Tanner

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

Study of Teleoceras remains in the University of Nebraska State Museum indicates that this specialized, short-limbed rhinoceros inhabited the Central Great Plains from Early through Late Pliocene. Previously thought to have become extinct at the end of the middle Pliocene, this genus is now known from the very latest Pliocene. A new species, Teleoceras schultzi, is described from the Kimball Formation, Ogallala Group, Frontier County, Nebraska.

The Historical Development Of Wasatch Trails In Salt Lake County, Clyde Brian Hardy

Theses and Dissertations

In this study investigation was made concerning the etiology of the foot trails that thread their way through Wasatch Forest lands in Salt Lake county. The time delimitation was 1847 to 1975.

The origin of the majority of these trails dates back to the nineteenth century and is closely tied to the efforts of pioneers who labored to wrest a living from semi-arid land. Early lumbering, livestock operations, mining activities, water collection systems, and pioneer recreation all provided impetus for trail development. In a sense these trails are a kind of anthology of human endeavor.

Passing into the twentieth century …

Summary Of Trial Results - 1975, N. R. Mckeown

Experimental Summaries - Plant Research

1. From September 1971 to late August 1974 there was a mean reduction of legume content in the medic pastures from 40 per cent to 22.0 per cent but the reduction at 7.4 sh/ha was to 31 per cent. The drop in woolly clover content on the volunteer pastures was closely similar. 2. In 1972, at 7.4 sheep/ha a difference in body weight of 7-9 kg rapidly developed in favour of sheep grazing barrel medic compared with sheep on volunteer pasture. This difference was maintained consistently throughout the trial. At lower stocking rates the differences were smaller and less consistent. …

Extracts From The Department Of Agriculture's Annual Report, 1974-75, Department Of Agriculture, Western Australia

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

The Department of Agriculture's Annual Report for the year ended June 30, 1975, took the form of short reviews of selected activities of the Department during the year.

Some of these reviews are reprinted below to give an idea of the range of activities undertaken by the Department. A limited number of copies of the full report are available to interested organisations from the Department of Agriculture, Jarrah Road, South Perth, 6151.

In past years the Department's report has taken the form of a relatively detailed technical summary of the work of each Division. Because of the large volume of …

Effects Of Atrazine On Penned Pheasants And The Occurrence Of Stress Marks On Feathers, Thomas Orin Melius

Electronic Theses and Dissertations

Doses of 4 g of atrazine (AAtrex) were not lethal to penned hen pheasants (Phasispus colchicus), but levels of 6, 8, 10 and 12 g induced mortality. Pen studies to determine the effects of atrazine on reproduction of hen pheasants were conducted with two replicates of the basic test. Birds were administered treatment levels of 0, 100, 200, or 400 mg of atrazine per hen per week. Egg production and gain in weight of hens were unaffected by the treatments. Replicate A eggs were unaffected by the treatments. Replicate A eggs were unaffected in shell thickness and pipping rates, while …

Food Habits Of Young-Of-The-Year Fishes In Abbey Pond, South Dakota, Randall D. Radant

Electronic Theses and Dissertations

Food habits of young-of-the-year largemouth bass (Micropterus salmoides), bluegill (Lepomis macrochirus), black crappie (Pomoxis nigromaculatus), yellow bullhead (Ictalurus natalis), and yellow perch (Perca flavescens) were studied during 1973 and 1974 in Abbey Pond, South Dakota. Organisms found in young-of-the-year fish stomachs and in plankton samples were identified and counted in the laboratory. Zooplankton, aquatic insects and fish were the most important food organisms consumed by young fishes. Using Ivlev’s electivity index food electivity by the fishes for zooplankton was calculated. The size-specific food habits of young-of-the-year largemouth bass progressed from entomostracans to aquatic insects to fish. In most cases zooplanktons …

Food And Distribution Of Underyearling Brook And Rainbow Trout In Castle Lake, California, Wayne A. Wurtsbaugh, R. Brocksen, C. Goldman

Watershed Sciences Faculty Publications

A difference was found in the summer distribution of underyearling brook trout, Salvelinus fontinalis (Mitchill), and planted rainbow trout, Salmo gairdneri Richardson, in Castle Lake, California. Brook trout underyearlings oriented to the bottom and were found primarily in shallow water on the eastern shore of the lake near springs. The rainbow trout underyearlings were more pelagic and were found in the littoral areas along the entire shoreline. Gravimetrically, the food eaten during the summer by brook trout underyearlings was 13% terrestrial, 11% limnetic, and 76% benthic. Rainbow trout ate 15% terrestrial, 15% limnetic, and 70% benthic food. In summer, rainbow …

A Statistical Approach To The Study Of The Ecosystems Of Seven Ponds In East-Central Illinois, Gregory Lee Orr

Masters Theses

Gross primary productivity, heterotrophic bacterial numbers, and net phytoplankton densities of seven ponds in Coles County, Illinois, were studied in relation to physical, chemical, and biological habitat variables (light intensity and duration, turbidity, water temperature, pH, dissolved oxygen, sulfur, nitrogen, phosphorus, production, bacteria, and phytoplankton). Ten observations were made for each pond (except where otherwise noted) from 17 June through 25 August 1974. Stepwise multiple linear regression analyses of the data were used in order to determine those environmental factors which were important in predicting (i.e., significantly correlated with) bacterial and phytoplankton densities, and production. A multiple linear regression equation …

Some Relationships In The Water Quality And Life Forms Of Field Tile Effluents And Downstream Water, Joseph C. Sidwell

Masters Theses

No abstract provided.

Late Pleistocene And Holocene Geology Of The Moe Site, New Town, North Dakota, Richard W. Kornbrath

Theses and Dissertations

Eight stratigraphic units of Late Cenoioic age are present around the Moe Archeological Site near New Town, North Dakota. Unit Zero is a layer of glacial sediment consisting of grayish brown pebbly clay loam. Unit One consists of fluvial and beach sand and gravel. Unit Two consists of light yellowish brown, offshore lake silt that was deposited into a glacial lake in Late Wisconsinan time. Unit Three is a layer of glacial sediment consisting of grayish brown pebbly clay loam (Late Wisconsinan). Unit Four consists of fluvial sand and gravel (Late Wisconsinan}. Unit Five is a layer of slough sediment …

Raising Wood Ducks, Richard L. Nelson

Nebraska Game and Parks Commission: Publications

Numbered among Nature's most colorful creatures, wood ducks willingly accept a helping hand from man in establishing new homes. These birds adapt well to suitable habitat, and you can play an important part in bringing the wood duck to locations where they do not now nest. For groups or individuals who are willing to expend the effort necessary to undertake a wood duck restoration project anti see it to completion, it is an exceptional gift from today's generation to those of decades and centuries to come. Many areas in Nebraska provide suitable wood duck habitat, but do not have a …

Water Current, Volume 7, No. 1, January 1975

Water Current Newsletter

From the Desk of the Director
Conference Held on Research in Action
NWRRI Research Seminar
Nebraska First in NPDES Program
Resignations and Retirements from OWRT
Future Water Crisis Noted
Horton Outlines Federal Water Policy
Research Review: Seasonsal Water Use of Irrigated Pasture Grasses Under Permanent-Set Irrigation as Related to Climatic Factors