Digital Commons Network^™

Bulk Hybridization Of Smooth Bromegrass (Bromus Inermis), Wayne E. Domingo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Large populations of controlled hybrids are essential to the most rapid progress in many phases of plant breeding programs. Plant species vary in the ease with which they may be hybridized. Hand hybridization of forage grasses is usually slow and laborious, and the minuteness of the floral parts of most of the species which have perfect flowers renders their hybridization by hand especially difficult and tedious. This difficulty limits the use that forage grass breeders are making of the significant principles of hybridization and thereby retards progress in this phase of plant breeding. Any dependable, rapid technique of hybridization which …

Reflex Action In The Earthworm, As A Typical Example Of The Annelids, Morris L. Yoder Jr.

Biology Honors Papers

This 18 page thesis discusses the anatomy of the earthworm and importance of reflex actions, including responses to various stimuli and the role of the nerve cord.

The Relation Of Some Physical And Chemical Factors Of The Soil To The Productivity And Distribution Of Certain Waterfowl Food Plants At The Bear River Migratory Waterfowl Refuge, Grant Hortin Jensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the last few years several areas within the state of Utah have been and are being developed for the conservation of migratory birds. Of utmost importance in this respect is the management of these areas so as to obtain a sufficient supply of rood plants for use by water fowl. Previous work done at the Bear River Migratory Waterfowl Refuge shows that the productivity of aquatic rood plants, chiefly Potamogeton pectinatus L. and Ruppia maritima L. varies with different localities and that these differences could not be attributed to chemical conditions of the water, i.e., dissolved oxygen, alkalinity, and …

Fifty-Fourth Annual Meeting Of The Iowa Academy Of Science And The Ninth Annual Convention Of The Junior Academy Of Science Of Iowa, April 19 And 20, 1940, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Front Matter

Journal of the Minnesota Academy of Science

No abstract provided.

The Effect Of Environmental Factors Upon The Growth Rates Of Minnesota Fishes, Samuel Eddy, Kenneth D. Carlander

Journal of the Minnesota Academy of Science

No abstract provided.

Minnesota Lake Surveys And Fish Management, Samuel Eddy

Journal of the Minnesota Academy of Science

No abstract provided.

Experimental Simulation Of Winter Anaerobiosis, Raymond L. Lindeman

Journal of the Minnesota Academy of Science

No abstract provided.

Regional Plankton Studies In Minnesota, Charles B. Reif

Journal of the Minnesota Academy of Science

No abstract provided.

When Are Pine Cones Ripe?, Paul O. Rudolf

Journal of the Minnesota Academy of Science

No abstract provided.

Deer Inventory Studies In Minnesota, Gordon Fredine

Journal of the Minnesota Academy of Science

No abstract provided.

Further Studies On Prosthogonimus Macrorchis, Oviduct Fluke Of Poultry, With Special Reference To The Effect On Egg Production In The Ring-Necked Pheasant, Ralph W. Macy

Journal of the Minnesota Academy of Science

No abstract provided.

Longevity Of Red Pine Seed, Eugene I. Roe

Journal of the Minnesota Academy of Science

No abstract provided.

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.

Kentucky Warbler (Vol. 16, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Control Of Stored Grain Pests In Nebraska, M. H. Swenk, D. B. Whelan

Nebraska Agricultural Experiment Station: Historical Circulars

At the close of 1939 about twice the amount of wheat was in storage in Nebraska as compared to the close of 1938. Frequently a new crop of grain goes into storage before the preceding older grain leaves the farm, and, due to inadequate storage space, the crops are not kept separated, thus promoting an early infestation of the new grain from the older grain that has become infested. Under such conditions the damage by stored grain pests becomes a matter of unusual importance.

North And South Dakota Horticulture, April 1940, North And South Dakota State Horticultural Societies

North and South Dakota Horticulture

Volume 13, Number 4

The Sandhill Crane, O.A. Stevens
Newslants, H.A. Graves
Selling S.D. Trees, E.H. Everson
Manitoba News Letter, W.R. Leslie
Secretary's Corner, W.A. Simmons
April, W.E.H. Porter
President's Corner, H.E. Beebe
Fruit and Vegetable Notes, F.X. Wallner
Lilies, C.M. Clarke
Book Review, Mrs. F. Briley
Grapes in a Prairie Garden, C.A. Barr

Block And Bridle Annual 1940

Block and Bridle Annual (1933–2021)

The objectives of the Block and Bridle Club of Nebraska may be stated in a few words. They are, to foster an interest in the livestock industry, and to advertise that industry through favorable publicity; to prepare outstanding students of today for leadership tomorrow; to provide a means by which to congenial group of young men may meet and benefit each from the association of the others; and to participate in activities of the Campus so that the entire student body may profit not only in money but in useful things accomplished.

The Morphology And Histology Of The Virginia Oyster, Ostrea Virginica, Lister, Lewis Charles Goldstein

Master's Theses

The oyster has been known and used commercially since before the Roman and Greek civilizations, and reports of investigations pertaining to it can be found dating back almost to that period. Because of the commercial value of the oyster, most of the study of' the animal has dealt with its economic importance. Definite information concern­ ing the morphology and microscopic . structure of this Mollusc, therefore, is scarce. To be sure, there is an abundance of miscellaneous literature, but no systematic microscopic study has been reported. T. C . Nelson (1938) states, "A critical survey of the abundant and scattered …

Noteworthy Plants From The Duluth Area, Olga Lakela

Journal of the Minnesota Academy of Science

No abstract provided.

Deterioration Of Midwestern Ranges, J. E. Weaver, F. W. Albertson

Department of Agronomy and Horticulture: Faculty Publications

The native grasses of the mixed prairie and short-grass plains disclimax have been subjected for a long period of years to extreme drought, much overstocking, and severe damage from dust. Behavior of the vegetation during the dry year of 1933, the extreme drought of 1934, and the terrible dust storms and intermittent periods of desiccation during subsequent years, has been continuously observed (Weaver and Albertson, '36). Previous studies in this area furnished a back- ground which enabled one to compare present conditions with those of the pre-drought period (Weaver, '24; Clements and Weaver, '24; Albertson, '37). A large series of …

An Inquiry Into The Influence Of Environment On The Incidence Of Poultry Diseases, L. Van Es, J. F. Olney

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The principal purpose of the investigation reported here was to evaluate, if possible, hygienic measures, and in addition to gather whatever information might become available pertaining to the relation of certain disorders to a given poultry population after its exposure to their specific etiologic factors. The experiments were conducted on a piece of ground upon which poultry had not been maintained for many years, if ever.

Vegetative Composition And Grazing Capacity Of A Typical Area Of Nebraska Sandhill Range Land, A. L. Frolik, W. O. Shepherd

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The sandhill area of Nebraska occupies approximately 20,000 square miles of the central portion of the state. Being unadapted to cultivation, the land is for the most part still covered with native vegetation. It is utilized primarily for the production of livestock, chiefly cattle. During the period 1931 to 1938 the sandhills carried annually an average of 1,041,000 cattle, which amounted to 31 per cent of the total number in the state. The management practices used in the Nebraska sandhills have gained national recognition as a good example of range conservation in the United States. The purpose of this study …

Bulletin No. 291 - Range Resources Of Rich County, Utah, L. A. Stoddart

UAES Bulletins

In 1936 the Utah Agricultural Experiment Station organized project 179 entitled "A study of agricultural resources of Utah and their utilization." The project was divided into four sub-projects, A dealing with agricultural economics, B dealing with soil resources, C dealing with irrigational water resources, and D dealing with range resources.

Sub-project D, entitled "Range resources and condition of vegetation cover," was begun in 1936 with a survey of Duchesne and Uintah Counties, and the findings were published as Utah Station Bulletin No. 283, "Range conditions in Uinta Basin, Utah." The field season of 1937 was devoted to Wasatch County, and …

Spraying Tree Fruits, C. C. Wiggans, E. H. Hoppert

Nebraska Agricultural Experiment Station: Historical Circulars

The production of sound, clean fruit is unquestionably one of the major problems facing the modern fruit grower. Culture may be neglected and pruning delayed for a time but the omission of sprays for even a single season demonstrates their absolute necessity. This applies equally to the commercial grower and to the farmer or gardener who has only a few trees.

North And South Dakota Horticulture, March 1940, North And South Dakota State Horticultural Societies

North and South Dakota Horticulture

Volume 13, Number 3

The Barn Owl, O.A. Stevens
Newslants, H.A. Graves
Trees for South Dakota, E.H. Everson
President's Corner, H.E. Beebe
Manitoba News Letter, W.R. Leslie
Secretary's Corner, W.A. Simmons
March, W.E.H. Porter
Fruit and Vegetables Notes, F.X. Waller [sic]
Book Review, Mrs. F. Briley
Questions and Answers, Prof. L.L. Davis
Premium List

North And South Dakota Horticulture, February 1940, North And South Dakota State Horticultural Societies

North and South Dakota Horticulture

Volume 13, Number 2

The Scarlet Tanager, O.A. Stevens
Newslants, H.A. Graves
N.D. Premium List
President's Corner, H.E. Beebe
Manitoba News Letter, W.R. Leslie
Secretary's Corner, W.A. Simmons
Tardy Winter, W.E.H. Porter
Fruit and Vegetable Notes, F.X. Wallner
Beekeeping Notes, J.A. Munro
Questions and Answers, L.L. Davis
Book Reviews, Mrs. F. Briley

A Study Of Subspecific Variation In The Yellow Pocket-Gopher (Geomys Lutescens) In Nebraska, And Of The Geographical And Ecological Distribution Of The Variants, Myron H. Swenk

University of Nebraska State Museum: Mammalogy Papers

The Yellow Pocket-Gopher (Geomys lutescens) was described by Merriam (14) in 1890, as a paler and smaller subspecies of Geomys bursarius, based on "numerous specimens received from the Sand Hills of western Nebraska", and especially upon an adult Cjl type specimen (No. 23595, U. S. N. M.) collected in the sandhills along Birdwood Creek, Lincoln County, Nebraska, May 27, 1889, by A. B. Baker. Although even as late as 1931 Scheffer (17) classified Geomys lutescens as a subspecies of G. bursarius, it is without doubt specifically distinct from G. bursarius. In all of its variations …

A Comparative Study Of Textbooks In General Agriculture Used In Senior High Schools, Lowell O. Yasmer

Master's Theses or Doctor of Nursing Practice

The specific problem of the thesis is, "A Comparative Study of Certain Textbooks in General Agriculture Used in Senior High Schools.” It is limited in that it doe s not cover all textbooks in the field of general agriculture , but only those which made a certain score or rating through the use of a device formulated for this purpose, nor was it the problem to discover which is the best textbook in agriculture but rather to make a comparative analysis of the textbooks selected. The books selected were compare d critically with each other in an effort to determine …