Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 186241 - 186270 of 189704

Full-Text Articles in Life Sciences

Shorter Articles And Reports: The Simultaneous Modification Of Distinct Mendelian Factors, R. A. Emerson Jan 1913

Shorter Articles And Reports: The Simultaneous Modification Of Distinct Mendelian Factors, R. A. Emerson

Agronomy & Horticulture -- Faculty Publications

In another paper on the inheritance of a recurring somatic variation in variegated ears of maize, it was shown that the amount of red color developed in the pericarp of variegated seeds bears a definite relation to the development of color in the progeny of such seeds. The relation is such that the more color there is in the pericarp of the seeds planted the more likely are they to produce plants with wholly self-red ears and correspondingly the less likely to produce plants with variegated ears. Self-red ears thus produced behave just as if they were hybrids between self-red ...


Scientific Proceedings Of The Royal Dublin Society; Unsound Mendelian Developments Especially As Regards The Presence And Absence Theory, James Wilson Dec 1912

Scientific Proceedings Of The Royal Dublin Society; Unsound Mendelian Developments Especially As Regards The Presence And Absence Theory, James Wilson

Forensics

No abstract provided.


Unlawful Iowa Weeds And Their Extermination, L. H. Pammel, Charlotte M. King Dec 1912

Unlawful Iowa Weeds And Their Extermination, L. H. Pammel, Charlotte M. King

Circular

The Iowa weed law is violated in many parts of the state, partly because the farmers and some officers are unfamiliar with the law, and partly because they are not interested in the important question of weed control.


On The Status Of Some Species Of The Genus Panurginus, J. C. Crawford Dec 1912

On The Status Of Some Species Of The Genus Panurginus, J. C. Crawford

Co

In a paper on the bees of Nebraska, Messra Swenk and Cockerell say that a comparison of cotypes of Panurginus nebrascensis with specimens of P. ornatipes shows that the two are synonyms and that P. boylei is a subspecies. The types of all of the involved species being in the collections of the U.S. National Museum has led to a re-examination of them and the characters given show them to be abundantly distinct. In view of these characters, what Messrs. Swenck and Cockerell has under the name ornatipes is somewhat of a mystery.


Notes On Some Canadian Bees, J. C. Crawford Dec 1912

Notes On Some Canadian Bees, J. C. Crawford

Co

The specimens here recorded are part of a collection made at Medicine Hat, Alberta, by Mr. J. R. Malloch, between September 1st and October 15th, 1911. Other species of bees, which have not been studied, were also collected.


The North American Digger Wasps Of The Subfamily Scoliinae, Oscar C. Bartlett Dec 1912

The North American Digger Wasps Of The Subfamily Scoliinae, Oscar C. Bartlett

Ba

This contribution to our knowledge of the sub-family Scoliinae (digger wasps) found in North America, Central America and the West Indies, is the result of work done at the Massachusetts Agricultural College under the direct supervision of Doctor H. T. Fernald, and forms a portion of a thesis for the degree of doctor of philosophy. In it, an attempt has been made to place before those interested, a paper in which our present knowledge of these wasps is systematically arranged and the identification of the species facilitated.


Beef Production., H. R. Smith Oct 1912

Beef Production., H. R. Smith

University of Nebraska Historical Extension Bulletins

Contents: Part I. Comparison of Rations. Part II. Comparison of Breeds and Types.


Bulletin No. 96 - Ration Experiments With Swine, University Of Wyoming Agricultural Experiment Station Oct 1912

Bulletin No. 96 - Ration Experiments With Swine, University Of Wyoming Agricultural Experiment Station

Wyoming Agricultural Experiment Station Bulletins

No abstract provided.


Some American Lebertia, Ruth Marshall Oct 1912

Some American Lebertia, Ruth Marshall

Faculty Publications in the Biological Sciences

The genus Lebertia of the water-mites is easily recognized by the character of the epimera. It belongs to a small group of genera, the subfamily Lebertiinae, characterized by the union of the four pairs of epimera into a single group, with their more or less complete fusion. This forms a shield which covers a large part of the ventral surface of the body.


Descriptions Of New Hymenoptera No. 5, J. C. Crawford Sep 1912

Descriptions Of New Hymenoptera No. 5, J. C. Crawford

Co

Many of the species herein described were received from the Bureau of Entomology, United States Department of Agriculture, having been reared by its various branches in economic investigations as parasites of injurious insects. In this connection attention is especially called to the interesting and varied series reared from Agromyza. In this paper, as in all previous papers published by me, the sex first described is to be taken as the true type and the second as the allotype.


Good Seed Corn For 1913, H. D. Hughes Sep 1912

Good Seed Corn For 1913, H. D. Hughes

Circular

Whether Iowa farmers will have good seed corn for next spring's planting will depend upon whether they select their seed In the Held early, before a sharp freeze, and whether they dry It properly this fall and store It In the right kind of a place this winter. If any one or these factors Is neglected, the man who neglects them Is more than likely to be without good seed corn In 1913.

Although a general alarm.about seed corn has been sounded regularly every fall for some years, the vitality of the seed In the spring has become ...


Bulletin No. 95 - I. A Comparison Of Cotswold And Southdown Grade Lambs; Ii. Fattening Rations For Aged Ewes, University Of Wyoming Agricultural Experiment Station Sep 1912

Bulletin No. 95 - I. A Comparison Of Cotswold And Southdown Grade Lambs; Ii. Fattening Rations For Aged Ewes, University Of Wyoming Agricultural Experiment Station

Wyoming Agricultural Experiment Station Bulletins

No abstract provided.


Bulletin No. 118 - Methods For Increasing The Crop Producing Power Of Irrigation Water, John A. Widtsoe, L. A. Merrill Sep 1912

Bulletin No. 118 - Methods For Increasing The Crop Producing Power Of Irrigation Water, John A. Widtsoe, L. A. Merrill

UAES Bulletins

The studies of the Utah Station on the effect of water on the yields of crops have shown, first, that as the water applied increases, the total weight of dry matter also increases; and second, that the increase is not in proportion to the amount of water applied, since the less water applied, the larger the yield of dry matter for each inch of water used. These experiments, as reported in bulletins No. 116 and No. 117 indicate with much certainty the best quantities of water to use for various crops. When, however, each farmer has been allotted this best ...


Bulletin No. 120 - The Chemical Composition Of Crops As Affected By Different Quantities Of Irrigation Water, John A. Widtsoe, Robert Stewart Sep 1912

Bulletin No. 120 - The Chemical Composition Of Crops As Affected By Different Quantities Of Irrigation Water, John A. Widtsoe, Robert Stewart

UAES Bulletins

In earlier bulletins it has been shown that when the quantity of irrigation water applied to crops is varied, the yields of the total crop as well as of the several plant parts vary quite definitely. The readiness with which plants respond to differences in irrigation is really remarkable and undoubtedly lies at the foundation of the future science of irrigation.

Variations in the quantities of irrigation water not only affect the total yield of dry matter, but also the composition of the plant itself. This fact was brought out many years ago in the investigations of this Station.


Bulletin No. 117 - The Yields Of Crops With Different Quantities Of Irrigation Water, John A. Widtsoe, L. A. Merrill Sep 1912

Bulletin No. 117 - The Yields Of Crops With Different Quantities Of Irrigation Water, John A. Widtsoe, L. A. Merrill

UAES Bulletins

The value of an irrigated farm rests In the land and in the water available for irrigation. Usually the water right for an acre is worth considerably more than the land itself. Under irrigation it is just as important to secure the largest yield per unit of water as it is to obtain the largest yield per acre. Owing to the high cost of water, the production per unit of water is frequently more important than the yield per acre. In Utah and the other irrigated states, the water available for irrigation, or that which may be made available, is ...


Bulletin No. 119 - The Effect Of Irrigation On The Growth And Composition Of Plants At Different Periods Of Development, John A. Widtsoe, Robert Stewart Sep 1912

Bulletin No. 119 - The Effect Of Irrigation On The Growth And Composition Of Plants At Different Periods Of Development, John A. Widtsoe, Robert Stewart

UAES Bulletins

Early in the pursuit of the irrigation investigations conducted by this Station, it became important to know the best amounts of water to apply at various stages of the plant's growth. The effect of the total quantity of water applied to a crop, depends in large measure upon the number of irrigations and their times of application during the season. It was thought that some light would be shed upon this problem by examining crops, under variable irrigation methods, at different times before maturity. Such work, also, it was hoped might yield more definite information concerning the manner in ...


Bulletin No. 116 - The Production Of Dry Matter With Different Quantities Of Irrigation Water, John A. Widtsoe Sep 1912

Bulletin No. 116 - The Production Of Dry Matter With Different Quantities Of Irrigation Water, John A. Widtsoe

UAES Bulletins

The second period of the irrigation investigations of the Utah Experiment Station began in 1901, when plans were formulated for accurate and extensive studies of the relations to each other of soils, crops and water. Preliminary work was done on the College Farm during the summer of 1901. During the winter of 1901-02, the Greenville Farm was secured, and on it was constructed a system of weirs, flumes and laterals, whereby accurately measured quantities of water could be placed at will upon any plat. With this apparatus a great number of vital questions concerning the practice of irrigation was submitted ...


Growing Alfalfa In Iowa, H. D. Hughes Jul 1912

Growing Alfalfa In Iowa, H. D. Hughes

Circular

When properly cared for, alfalfa can be grown almost anywhere in Iowa with success.

It is quite commonly accepted that this legume is not well adapted in Iowa's climatic and soil conditions and does not fit well into Iowa rotations, but practical experience does not justify this view. The success of many individual farmers and the result of experiments on various soils and under various climatic conditions demonstrate that if proper methods are followed alfalfa can be grown profitably on nearly all Iowa soils.


Bulletin No. 94 - The Chemical Examination Of Death Camas, University Of Wyoming Agricultural Experiment Station Jul 1912

Bulletin No. 94 - The Chemical Examination Of Death Camas, University Of Wyoming Agricultural Experiment Station

Wyoming Agricultural Experiment Station Bulletins

No abstract provided.


Bulletin No. 93 - Comparison Of Sheep Branding Paints, University Of Wyoming Agricultural Experiment Station Jun 1912

Bulletin No. 93 - Comparison Of Sheep Branding Paints, University Of Wyoming Agricultural Experiment Station

Wyoming Agricultural Experiment Station Bulletins

No abstract provided.


Circular No. 7 - Labor Saving Devices For The Farm Home, Leah D. Widtsoe Jun 1912

Circular No. 7 - Labor Saving Devices For The Farm Home, Leah D. Widtsoe

UAES Circulars

This paper was written for and read before the first International Congress of Farm Women held at Colorado Springs, October 17th to 21st, 1911. A few changes have been made in the manuscript and some illustrations added.

The name indicates that it is written for the progressive farmers of some means--since all labor saving devices cost more or less money. The farm home which finds it difficult to keep flour in the barrel, naturally will not be interested in $125.00 water systems--except as an ideal they may attain to some day, and ideals are always helpful. To find ways ...


Citrus Talks-Frost Prevention, Charles C. Chapman May 1912

Citrus Talks-Frost Prevention, Charles C. Chapman

Charles C. Chapman Citrus Speeches

This is the program for the Convention of Fruit Growers, called specifically to address the subject of frost prevention. Mr Charles C. Chapman addressed the convention as the President of the Citrus Protective League. The presentations addressed the history and importance of frost prevention and various methods of achieving it.


Circular No. 6 - Measurement And Distribution Of Irrigation Water, L. M. Winsor May 1912

Circular No. 6 - Measurement And Distribution Of Irrigation Water, L. M. Winsor

UAES Circulars

This circular has been prepared to meet the more urgent and immediate needs of the water user. The complications which usually arise in water measurement have been eliminated to such an extent that anyone who will follow the few simple instructions outlined in the following pages can learn to measure the flow of irrigation streams under ordinary conditions.


Spraying Apple Trees, University Of Nebraska (Lincoln Campus) Agricultural Experiment Station. Apr 1912

Spraying Apple Trees, University Of Nebraska (Lincoln Campus) Agricultural Experiment Station.

University of Nebraska Historical Extension Bulletins

The degree of success in spraying depends almost wholly upon when the materials are put on and how they are applied. 'The two principal pests that concern Nebraska apple growers are the apple scab and the codling moth worm. There are other injurious insects and fungous diseases common to the orchard, but if the orchard is properly treated for those two the others will in a large measure be controlled.


Fertility Experiments In A Rotation Of Cowpeas And Wheat, University Of Tennessee Agricultural Experiment Station, C.A. Mooers, H.H. Hampton, W.K. Hunter Apr 1912

Fertility Experiments In A Rotation Of Cowpeas And Wheat, University Of Tennessee Agricultural Experiment Station, C.A. Mooers, H.H. Hampton, W.K. Hunter

Bulletins

No abstract provided.


Home-Made Seed Corn Testers, H. D. Hughes Mar 1912

Home-Made Seed Corn Testers, H. D. Hughes

Circular

The seed corn situation in the corn-belt states this year is serious. Not as much seed corn was saved last year as usual, and a large number of tests made in different sections of the state show this to be very low in vitality. Very little of it is fit to plant without first being carefully tested.

Most farmers who had seed for sale have already sold out their surplus, so the bulk of the corn planted this year on Iowa farms will have to be saved from the corn grown upon the farm the past season. The only way ...


A Classification For Forestry Literature, Faculty Of The Yale Forest School Feb 1912

A Classification For Forestry Literature, Faculty Of The Yale Forest School

Yale School of Forestry & Environmental Studies Bulletin Series

The following classification for forestry literature has been prepared by the Faculty of the Yale Forest School for use in its library. It is published to supply the demand for a simple and comprehensive classification that is adapted to any library system. The work was begun about one year ago and included a study of all available data on the subject. A tentative outline was submitted to prominent members of the profession from whom helpful suggestions were received.

The subject has been divided into nine parts of approximately equal importance. The secondary divisions also have been limited to nine and ...


Circular No. 5 - Boys' Potato Clubs: How To Grow The Crop And Organization, J. C. Hogenson Feb 1912

Circular No. 5 - Boys' Potato Clubs: How To Grow The Crop And Organization, J. C. Hogenson

UAES Circulars

The object of the organization is to encourage, interest and instruct its members in agriculture, and particularly in the best methods of growing potatoes. "Efficiency" is the motto of the clubs. Efficiency in any good work is true and profitable education. To do good things intelligently and with cheerful spirit entitles the member to the highest degree of approval.


Scientific Proceedings Of The Royal Dublin Society; The Inheritance Of The Dun Coat-Colour In Horses, James Wilson Jan 1912

Scientific Proceedings Of The Royal Dublin Society; The Inheritance Of The Dun Coat-Colour In Horses, James Wilson

Forensics

No abstract provided.


Citrus Notes-The Santa Ysabel Ranch, Charles C. Chapman Jan 1912

Citrus Notes-The Santa Ysabel Ranch, Charles C. Chapman

Charles C. Chapman Citrus Speeches

These are notes for an article published in by the Fullerton News.