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Effect Of Stubble Mulching On Number And Activity Of Earthworms, S. P. Teotia, F. L. Duley, T. M. Mccalla

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A survey of earthworm population under different cropping systems was made under stubble mulch farming and where the residue was plowed under. The influence of earthworms on some of the important physical and biological properties of the soil was studied. Their role in the decomposition of crop residues was also determined.

The Growth-Promoting Properties Of Quinic Acid, Malcom Gordon, Francis A. Haskins, Herschel Mitchell

Department of Agronomy and Horticulture: Faculty Publications

Evidence is accumulating that there is a common metabolic precursor to many of the benzene ring derivatives found in living organisms. Recent work by Davis and Tatum indicates that one such precursor is the naturally occurring shikimic acid (Fig. 1) since this compound serves as a growth factor for certain mutants of Escherichia coli and Neurospora which otherwise require a combination of tyrosine, phenylalanine, tryptophan and p-aminobenzoic acid for growth. These mutants cannot utilize the closely related, naturally occurring quinic acid (Fig. 1) as a substitute for any of their requirements.

A Guide To The Collection Of Technical Intelligence, Part I, July 1950, Department Of The Army, Assistant Chief Of Staff, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This is a detailed, well-illustrated guide showing the range of weapons and equipment army technical intelligence was interested in, including:

• Armored vehicles
• Artillery
• Infantry small arms
• Mortars, antitank weapons, and grenades
• Mines, booby traps, and demolitions
• Ammunition
• Artillery rockets and rocket launchers

Notable lapses in this booklet are:

(a) Lack of guidance for using the booklet and

(b) The lack of mention of:

• Radio and electronic equipment
• Chemical, biological, and radiological warfare equipment
• Bridge and stream-crossing equipment
• Construction equipment
• Trucks and other transportation equipment
• Quartermaster type equipment
• Specialized equipment for Arctic warfare.

When this booklet was published, the technical intelligence …

Whole Issue Nebraska Bird Review (July 1950) 18(3)

Nebraska Bird Review

Contents

Twenty-five Year Summary of Bird Migration in Nebraska, Part 3 - Ducks ................William F. Rapp, Jr .................41

The Distribution of Field Observations on Nebraska Birds During the Last Fifty Years ••• Thomas B. Thorson .................... 47

Ornithology in Nebraska Colleges and Universities Ramona E. Dreyer and William F. Rapp, Jr ....................48

Least Tern ....................Photographed by Ray S. Wycoff, Lexington, Nebraska ....................50

Minutes of the Forty-Ninth Annual Meeting of The Nebraska Ornithologists' Union ....................52

Announcements & General Notes ....................56

Book Reviews ....................60

63rd Annual Report, Agricultural Experiment Station, University Of Nebraska College Of Agriculture, May 1950

Agricultural Research Division: News and Annual Reports

Soils Research Erosion Control and Moisture Conservation, Soil Microbiology and Crop Residue Management, Mineralogical Studies, Classification and Correlation of Soils in Soil Conservation Districts, Influence of Perennial Grasses on Soil Structure, Phosphorus Status of Nebraska Soils, Fertilizers for Corn on Nonirrigated Soils, Nitrogen Fertilizers for Bromegrass, Properties of Sandy Soils in Northeastern Nebraska, Fertilizers for Winter Wheat, Lime and Commercial Fertilizers for Sweetclover, Nitrogen Maintenance in Sharpsburg Silty Clay Loam Soil, Influence of Irrigation Practice, Seeding Rate and Fertilizer Application on the Production of Safflower, Cultural Experiments with Sugar Beets, Fertilizers for Potatoes Following Bromegrass Pasture, Influence of Irrigation Practice, …

It's Time To Take Stock

United States Environmental Protection Agency: Publications

Likening colleges and universities to the automobile industry may seem far-fetched, but is it? Each is engaged in fashioning and selling necessary products- one trained men, the other mechanical equipment. Both entered the post-war years with production at low ebb; unable to satisfy pent-up customer demands. Time and high-speed assembly lines have bridged the gap of gas buggy shortage. The impact of selective buying by a discriminating public is now real cause for concern among some of the motor moguls. Rumor has had it that schools teaching wildlife management are overproducing. We decided to gather facts and opinions at the …

Whole Issue Nebraska Bird Review (April 1950) 18(2)

Nebraska Bird Review

Contents

Twenty-five Year Summary of Bird Migration in Nebraska, Part 2.....William F. Rapp, Jr. ..............23

News and Notes ..............25

Report of the Membership Committee 29

Wildfowl Sketches....C.G. Pritchard ..............30

Announcements ..............32

General Notes ..............32

Periodicals in the Nebraska Ornithologists' Union Library ..............36

Book Reviews ..............39

Microorganisms And Soil Structure, T. M. Mccalla

Department of Agronomy and Horticulture: Faculty Publications

SUMMARY

Laboratory tests were made to determine the effectiveness of different compounds and microbial groups in increasing the stability of Peorian loess lumps against the action of falling water drops. The influence of these on percolation tests in the laboratory was also determined.

Many organic substances-dextrose, sucrose, starch, peptone, cullulose, and gum arabic-did not themselves contribute directly to soil-structure stability, though these substances do furnish energy material for soil microorganisms, which can convert them readily into either microbial tissue or decomposition products that increase soil-structure stability. Lignin, proteins, oils, fats, waxes, resin, and paraffin increased the stability of lumps of …

Public Health Reports, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Preliminary tests with DDT for the control of mosquitoes, forest insects, and agricultural pests demonstrated that it was toxic to a wide variety of animal life. Because there were indications that the new insecticide would be widely used, apprehension was expressed by some groups that its extensive or indiscriminate use would cause extensive harm to wildlife.

The desirability of carefully controlled use was early recognized by those in charge of extensive programs for the control of insects of public health importance. A joint statement of policy for the use of DDT issued early in 1945 (1) by the Army and …

Whole Issue Nebraska Bird Review (Jan 1950) 18(1)

Nebraska Bird Review

Contents

Nesting Birds on a Keith County Farm.............Mrs. Carl N. Collister .............1

Twenty-five Year Summary of Bird Migration in Nebraska
William F. Rapp .............5

Announcements .............11

Pictorial Study of a nesting Eastern Red-Wing.....Adrian C. Fox .............12

General Notes .............14

Membership List............. 18

Book Reviews .............21

Research Bulletin 165, Effect Of Stubble Mulching On Number And Activity Of Earthworms, 1950

University of Nebraska Historical Extension: Bulletin

Research Bulletin 165, Effect of Stubble Mulching on Number and Activity of Earthworms, 1950

Report Of The Game, Forestation And Parks Commission 1950

Nebraska Game and Parks Commission: Publications

No abstract provided.

An Ecological Study Of Helminths Of Some Wyoming Voles (Microtus Spp.) With A Description Of A New Species Of Nematospiroides (Heligmosomidae: Nematoda), Merle L. Kuns, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

An ecological and taxonomic study of the helminth parasites of voles (Microtus spp.) in the Jackson Hole region of Wyoming is reported.

Nematospiroides microti n. sp. from Microtus montanus nanus and M. richardsoni macropus is described and figured.

A cestode, Paranoplocephala infrequens, and a nematode, Syphacia obvelata, were generally distributed throughout the region in all habitats except the sage flats.

A trematode, Quinqueserialis hassalli, was recovered only from voles collected near streams at low altitudes. This was presumably due to the localized distribution of the molluscan intermediate host.

Four helminths, viz., Hymenolepis horrida, Heligmosomum costellatum …

Studies On Some North American Shrew Cestodes, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

In spite of the importance of the various species of shrews to the biotic community, several aspects of their ecology remain very incompletely known. The helminths parasitic in the more conspicuous small mammals in North America have been studied more or less completely, but those occurring in shrews have been largely disregarded. This situation is particularly inappropriate when one considers that shrews often constitute the most abundant mammalian group in a given area. We have attempted to secure an adequate amount of shrew helminth material for study, and it is the purpose of this paper to present observations resulting from …

The Species Concept: A Semantic Review, Benjamin H. Burma

Department of Earth and Atmospheric Sciences: Faculty Publications

In some respects, it is extremely unfortunate that names are ever attached either to ideas or objects. The false attachment of names to ideas or objects similar but not identical with the original can work harm far exceeding the benefits conferred by having a convenient label. The name "species" has come to such a state. As we shall see, a species, be it plant or animal, is a fiction, a mental construct without objective existence. Animal, and plant, lines of descent exist in a four-dimensional continuum. To set up species in this continuous line of descent, we must chop it …

Effect Of Storage Temperatures On Triumph Seed Potatoes Used For The Early Crop In The South And In Central Nebraska, H. O. Werner

Nebraska Agricultural Experiment Station: Historical Research Bulletins

During the decade 1931-1940 it became increasingly apparent that some factor (or factors) besides disease was responsible for much of the variation in yields produced by lots of certified seed potatoes planted in commercial fields and comparative trial plots in the South during midwinter. This bulletin reports investigations into the method of storing western Nebraska seed potatoes as a means of improving the production of the early crop of Triumphs in the Gulf Coast States.

A Filter Paper "Chromatopile", Herschel Mitchell, Francis A. Haskins

Department of Agronomy and Horticulture: Faculty Publications

The application of one- and two-dimensional paper chromatography to the separation of small amounts of many kinds of compounds has become a well-established and useful technique (1, 2, 3, 5, 6). In general these methods do not handle sufficiently large quantities of materials for isolation and chemical identification. Large columns of starch and other materials have been used satisfactorily for handling larger quantities of mixtures (4). Starch columns proved to be unsatisfactory, how- ever, for isolation of certain substances under investigation in this laboratory. As a consequence, a new and simple apparatus and technique have been developed, using …

62nd Annual Report, Agricultural Experiment Station, University Of Nebraska College Of Agriculture, May 1949

Agricultural Research Division: News and Annual Reports

Contents

Cover Picture-Dr. Ephriam Hixson, Experiment Station entomolO