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Articles 39991 - 40020 of 40108
Full-Text Articles in Entire DC Network
The Common Intestinal Roundworm Of Swine, H. M. Martin
The Common Intestinal Roundworm Of Swine, H. M. Martin
Nebraska Agricultural Experiment Station: Historical Circulars
The large intestinal roundworm of pigs is a very common parasite, and is probably present in every hog raising district of Nebraska. Up until the last few years the true nature of this parasite was unknown. Little did we realize the actual harm done by this worm; but through the scientific investigations of Stewart, Ransom, and others we now know that this parasite causes heavier losses to the breeder and feeder of swine than any other now common in Nebraska.
Relation Of Environment And Other Factors To Potato Wilt Caused By Fusarium Oxysporum, R. W. Goss
Relation Of Environment And Other Factors To Potato Wilt Caused By Fusarium Oxysporum, R. W. Goss
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The present work was undertaken to determine the influence of some environmental factors on the infection and progress of the disease potato wilt. The work has not progressed to the point of determining the exact relation of each of these factors. However, the results thus far obtained are presented here in order to direct attention to the nature and distribution of the disease in relation to the environmental conditions under which certain types of infection take place.
Some Field Instruments And Their Applications, G. W. Goldsmith
Some Field Instruments And Their Applications, G. W. Goldsmith
University Studies (University of Nebraska) (1888–1984)
Physiology and ecology depend for their constructive development largely upon the applications of physico-chemical concepts to living organisms and their environment, to their life processes, reactions, and interrelations. A concept is valuable biologically in so far as it can be applied and used as a tool for better understanding of the phenomena related to life. Ecology, as the study of the relations between organisms and their environment and of the interrelations of organisms, depends primarily upon the findings of physiology (Clements, 1905). But to apply physicochemical concepts and hence make them of value to the physiologist or ecologist commonly requires …
Reglamento General Para La Pesca De La República De Cuba, República De Cuba. Secretaría De Agricultura, Comercio Y Trabajo
Reglamento General Para La Pesca De La República De Cuba, República De Cuba. Secretaría De Agricultura, Comercio Y Trabajo
Mario Diaz Cruz Pamphlets
Publicado en "Gaceta Oficial" el 28 de Mayo de 1923
Anthocyan Pigments, Paul B. Sears
Anthocyan Pigments, Paul B. Sears
Papers in Ecology
Noack has found rhamnose-free flavonol diglucosides to be much more abundant in green leaves than has generally been supposed. In such leaves as he studied he was able to establish the existence of flavonol-anthocyan in couples of similar glucosidal nature, but secured no evidence of aromatic nucleus composition in such cases. He suggests that these couples function as a reduction mechanism during photosynthesis.
The Common Intestinal Roundworm Of Swine (Ascaris Lumbricoides), H. M. Martin
The Common Intestinal Roundworm Of Swine (Ascaris Lumbricoides), H. M. Martin
Nebraska Agricultural Experiment Station: Historical Circulars
The large intestinal roundworm of pigs is a very common parasite and is probably present in every hog raising district of Nebraska. Up until the last few years the true nature of this parasite was unknown. Little did we realize the actual harm done by this worm; but through the scientific investigations of Stewart, Ransom, and others we now know that this parasite causes heavier losses to the breeder and feeder of swine than any other now common in Nebraska.
Some Hymenopterous Parasites Of Lignicolous Itonididae, Charles Thomas Brues
Some Hymenopterous Parasites Of Lignicolous Itonididae, Charles Thomas Brues
Bo
No abstract provided.
Eine Hymenopteren-Ausbeute Aus Dem Amanusgebirge. (Kleinasien Und Nord-Syrien, Südl. Armenien.), Josef Fahringer, Heinrich Friese
Eine Hymenopteren-Ausbeute Aus Dem Amanusgebirge. (Kleinasien Und Nord-Syrien, Südl. Armenien.), Josef Fahringer, Heinrich Friese
Er
No abstract provided.
Descriptions Records And Notes On North American Nyssonidae (Hymenoptera), James Chester Bradley
Descriptions Records And Notes On North American Nyssonidae (Hymenoptera), James Chester Bradley
Bo
No abstract provided.
Notes On Some Diseases Of Aspen, Carl Hartley, Glenn G. Hahn
Notes On Some Diseases Of Aspen, Carl Hartley, Glenn G. Hahn
Aspen Bibliography
No abstract provided.
Fusarium Blight Of The Soy Bean And The Relation Of Various Factors To Infection, Richard O. Cromwell
Fusarium Blight Of The Soy Bean And The Relation Of Various Factors To Infection, Richard O. Cromwell
Nebraska Agricultural Experiment Station: Historical Research Bulletins
An investigation was outlined (1) to determine the parasitism of Fusarium on soy bean, (2) to establish its relationship to Fusaria of the section Elegans in so far as a comparison of the cultural characters permitted, and (3) by means of cross- inoculations and field studies to determine the relationship of this disease of soy beans to the wilt disease of cowpeas (Vigna sinensis Hassk.) caused by Fusarium tracheiphilum Smith. The results of these investigations up to the close of the summer of 1916 have been reported. The studies were continued at the North Carolina Experiment Station until the …
The Nearctic Psammocharids Of The Genus Aporinellus Banks, Joseph Bequaert
The Nearctic Psammocharids Of The Genus Aporinellus Banks, Joseph Bequaert
Ba
On one of the collecting trips made this summer with Prof. William M. Wheeler, in the vicinity of Boston, I collected a little Psammocharid which has proved to be an undescribed species of Aporinellus. In comparing this specimen with Mr. Nathan Banks' extensive collection of Psammocharids I have found another undescribed member of the same genus. Descriptions of both forms are given herewith, together with a brief review of the group. I am much indebted to Mr. Nathan Banks, of the Museum of Comparative Zoology, Cambridge, Mass., for the loan of rich material containing many types and for valuable bibliographic …
A New Genus Of Bees From Peru (Hym.), T. D. A. Cockerell
Die Bienenfauna Pommerns, Paul Blüthgen
Halictinae De Cuba, Carl F. Baker
Halictinae De Cuba, Carl F. Baker
An
Las Halictinae, especialmente en los zonas templadas, forman uno de los grupos más grandes de abejas silvestres, y son de interés biológico especial en cuanto al importante papel que juegan en la polinización de las plantas. Ninguna abeja de este género es grande y en su mayoría son pequeñas. Al-gunas són de color colorado brillante pero la mayor parte carece de adornos. Las alas anteriores tienen el estigma muy desarrollado, dos ó tres células submarginales y la vena basal muy encorvada. Todas las hembras tienen en el último segmento dorsal un canal, llamado la rima, que á menudo se extiende …
Common Parasites Of Swine, J. T. E. Dinwoodie
Common Parasites Of Swine, J. T. E. Dinwoodie
SDSU Extension Circulars
The publication of this bulletin is designed to convey to hog raisers of this state information regarding some of the common parasites of swine. All of the parasites described herein have been found infesting swine within the state. Some of the parasites may be common in some localities, and uncommon in others. Undoubtedly all sections of South Dakota are in danger at any time of experiencing loss from these parasites.
Deterioration Of Cane Sugars In Storage: Its Causes And Suggested Measures For Its Control, William Ludwell Owen
Deterioration Of Cane Sugars In Storage: Its Causes And Suggested Measures For Its Control, William Ludwell Owen
LSU Agricultural Experiment Station Reports
No abstract provided.
Studies Of The Etiology And Control Of Blister Canker On Apple Trees, J. Ralph Cooper
Studies Of The Etiology And Control Of Blister Canker On Apple Trees, J. Ralph Cooper
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The blister canker caused by Nummularia discreta Tul. is by far the most destructive disease of apple trees found in the United States. Serious damage due to this disease was first reported in Illinois in 1902. Since that time the disease has been reported to cause much damage in all apple-producing sections east of the Rocky Mountains. In Nebraska the disease is so prevalent that it is practically impossible to find an orchard free from it, and in many instances whole orchards have been destroyed thru its attacks. Because of the rapid dissemination and the destructive nature of blister canker, …
Color And Color-Pattern Mechanism Of Tiger Beetles, Victor E. Shelford
Color And Color-Pattern Mechanism Of Tiger Beetles, Victor E. Shelford
University of Nebraska State Museum: Entomology Papers
In 1903 the writer undertook a study of variation of the tiger beetles. The work here presented is the outgrowth of this beginning, and indeed includes some small portions regarding color patterns that were written in that year. The work has been prolonged for many reasons, but chief of these was the very large number of species in the group and the fact that an adequate understanding of the material could not be attained without consulting many large collections. Further, the experimental results obtained in 1906 demanded a firsthand study of the variations of the species concerned and their natural …
Descriptions Of Fossil Insects, T. D. A. Cockerell
Ecological Studies In The Tension Zone Between Prairie And Woodland, J. E. Weaver, Albert F. Thiel
Ecological Studies In The Tension Zone Between Prairie And Woodland, J. E. Weaver, Albert F. Thiel
Department of Agronomy and Horticulture: Faculty Publications
Upon the completion of a series of investigations in southeastern Washington and adjacent Idaho, in which there was found to be a direct relation between the available water content of the soil and the evaporating power of the air as succession progressed from grassland through scrub to forest, the senior writer moved to Minneapolis, Minnesota. Here such excellent conditions of prairie invaded by scrub and followed by forest offered themselves for study that the services of the junior author were enlisted and an analysis of the situation attempted. Later this study was supplemented by similar work carried on at Lincoln, …
Bulletin No. 151 - The Freezing Of Fruit Buds, F. L. West, N. E. Edlefsen
Bulletin No. 151 - The Freezing Of Fruit Buds, F. L. West, N. E. Edlefsen
UAES Bulletins
There are many orchards in this country, so located that every few years a frost almost completely destroys the crop, either by killing the buds in the spring of the year, or by freezing the fruit in the fall, just before it is picked. Utah is no exception. A report made by the county agricultural agents of the state, shows that in the spring of 1916, 85 percent of the apples, 90 percent of the peaches, and 65 percent of the mall fruit were killed by frost with a corresponding amount of damage to field crops.
Some Neotropical Megachilid Bees, T. D. A. Cockerell
The Carpenter-Bees Of The United States Of The Genus Xylocopa, Arthur J. Ackerman
The Carpenter-Bees Of The United States Of The Genus Xylocopa, Arthur J. Ackerman
A
This paper forms the major part of a thesis for the degree of master of science at the Massachusetts Agricultural College, and it has been prepared under the supervision of Dr. H. T. Fernald. It is an endeavor to make more easy the identification of the bees of this genus.
A Physiological Study Of Two Strains Of Fusarium In Their Causal Relation To Tuber Rot And Wilt Of Potato, George K. Link
A Physiological Study Of Two Strains Of Fusarium In Their Causal Relation To Tuber Rot And Wilt Of Potato, George K. Link
Nebraska Agricultural Experiment Station: Historical Research Bulletins
1. Fusarium tuberivorum Wilcox and Link is the same as Fusarium trichothecioides Woll. 2. Both Fusarium oxysporum and F. trichothecioides can produce both tuber rot and wilt of the potato plant. 3. The wilt is induced by destruction of the root system and by clogging of the xylem elements in the stem, and is, in mild cases, marked by such symptoms as discoloration of leaves, curling and rolling of leaves, and production of aerial tubers. 4. Under field and storage conditions Fusarium oxysporum is more probably responsible for wilt than is F. trichothecioides, and the latter more responsible for …
The Colloidal Swelling Of Wheat Gluten In Relation To Milling And Baking, F. W. Upson, J. W. Calvin
The Colloidal Swelling Of Wheat Gluten In Relation To Milling And Baking, F. W. Upson, J. W. Calvin
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Our experiments deal with the changes in hydration capacity of gluten under different conditions and were carried out by determining accurately the amount of water absorbed by gluten from solutions of varying concentrations of different acids, both with and without the presence of salts.
Some Bees From Colorado, T. D. A. Cockerell
Some Rocky Mountain Andrenid Bees, T. D. A. Cockerell
A New Leaf-Cutting Bee From Brazil, T. D. A. Cockerell
Some California Bees, T. D. A. Cockerell