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A New Feeding Method And Standards For Fattening Young Swine, John Marcus Evvard 2017 Iowa State College

A New Feeding Method And Standards For Fattening Young Swine, John Marcus Evvard

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Regardless of the rather widespread development of feeding standards for fattening swine, there was in 1910 a manifest need for a more simple and effective method for practical field and feedlot feeding. This need stimulated the development of the free-choice system or standards of feeding, with or without modification, and also the perfection of the self-feeding practice. In this development emphasis was placed on capitalizing the appetite and feeding habits of swine, inasmuch as the appetite was found in controlled experiments to be a fairly accurate and reliable guide under most conditions of successful feeding.

Early isolated experiments, 1776 to ...


Bacteriological Studies On Sulfid Spoilage Of Canned Vegetables, C. H. Werkman 2017 Iowa State College

Bacteriological Studies On Sulfid Spoilage Of Canned Vegetables, C. H. Werkman

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Sulfid spoilage of canned vegetables is characterized by the marked blackening of the contents and the production of hydrogen sulfid by the organism responsible. Externally the can manifests no characteristics of spoilage; it does not swell or spring.

The condition constitutes a new type of thermophilic spoilage due to insufficient processing. It has caused losses in both the sweet corn and pea canning industries of the middle western states. The general characteristics of the spoilage have led to the designation of "sulfid spoilage" for this type.

Sulfid spoilage in canned sweet corn has been shown to be caused by a ...


Apple Breeding: A Study Of Jonathan Crosses, H. L. Lantz 2017 Iowa State College

Apple Breeding: A Study Of Jonathan Crosses, H. L. Lantz

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Two hundred seventy-three Jonathan seedlings produced by 11 crosses form the basis of the records in this bulletin.

These studies show clearly that the progenies produced by the different crosses of Jonathan differ or vary in many important characteristics. These variations are attributed to differences in the genetic constitution of the several varieties which were used in combination with Jonathan, and indicate the relative value of these varieties as parents when crossed with Jonathan.

The range of variation in the seedlings of these progenies is generally quite wide both as to tree and fruit. Differences in the horticultural characteristics such ...


Editor's Note On `Putting Fossils In Trees' Special Issue, April M. Wright 2017 Iowa State University

Editor's Note On `Putting Fossils In Trees' Special Issue, April M. Wright

April Wright

This special issue has its origins with a 2014 symposium organized by myself and my co-editors David W. Bapst, Graeme T. Lloyd and Nicholas J. Matzke at the Society for Vertebrate Paleontology meetings in Berlin, Germany. In the two years prior to 2014, there had been several interesting and important papers published [1] [2] [3][4] about estimating phylogenetic trees incorporating fossil taxa, and particularly involving Bayesian analyses. Some of these papers were written from a neontological perspective, and appeared in journals not often read by paleontologists. We convened our session with a simple idea: to get di#11;erent ...


Soggy Breakdown Of Apples And Its Control By Storage Temperature, H. H. Plagge, T. J. Maney 2017 Iowa State College

Soggy Breakdown Of Apples And Its Control By Storage Temperature, H. H. Plagge, T. J. Maney

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

1. Soggy breakdown, a non-parasitic disease which develops at low temperatures, is described.

2. Soggy breakdown is distinguished from "internal breakdown" and from "physiological decay "or the breakdown which accompanies senescence. The name "mealy breakdown" is suggested for the latter.

3. Grimes and Wealthy apples have been found to be very susceptible to soggy breakdown, while Jonathan, Arkansas, Willow and Northwestern Greening appear immune to the disease.

4. The initial appearance of soggy breakdown on Grimes in cold storage occurred during the early part of December.

5. Differences of 2° or 4° F. in cold storage temperatures markedly affected the ...


Soybean Inoculation Studies, Lewis W. Erdman, F. Scott Wilkins 2017 Iowa State College

Soybean Inoculation Studies, Lewis W. Erdman, F. Scott Wilkins

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The results of the soybean inoculation studies reported in this bulletin were obtained under field conditions, and the experiments extended over a period of three years. These studies included the testing of different ways of applying inoculated soil to soybean seeds as well as to the soil, and also the testing of a number of commercial cultures, secured from different sources, on the inoculation of soybeans. Data have also been reported which show the relative efficiencies of soil from different sources, pure cultures of soybean bacteria, and different commercial cultures on the inoculation of different varieties of soybeans. The effects ...


Physiological Studies On The Nitrogen Fixing Bacteria Of The Genus Rhizobium, Rudger H. Walker 2017 Iowa State College

Physiological Studies On The Nitrogen Fixing Bacteria Of The Genus Rhizobium, Rudger H. Walker

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

1. In the experimental work reported in this bulletin studies were made of some physiological activities of the nitrogen fixing bacteria of the genus Rhizobium, to ascertain whether or not certain tests could be used for diagnostic purposes in separating the various cross-inoculation groups.

2. The studies made include agglutination, gelatin liquefaction and fermentation of sugars and other carbon compounds.

3. The organisms used were chiefly of the alfalfa and sweet clover, soybean, pea, red clover and dalea groups. Bacillus radiobacter was also studied for purposes of comparison.

4. In this work agglutination occurred in all homologous tests.

5. In ...


Infection Studies With Watermelon Wilt Caused By Fusarium Niveum Efs., D. R. Porter 2017 Iowa State College

Infection Studies With Watermelon Wilt Caused By Fusarium Niveum Efs., D. R. Porter

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Watermelon wilt, caused by Fusarium niveum, is a serious disease in Iowa and in many other sections of the United States. The present Iowa acreage is less than 10 percent of the acreage before wilt became a factor.

Three heretofore undescribed seedling symptoms are described. These are: seedling rot, damping off and stunting.

The organism may cause lesions on any of the roots. These are at first water-logged and become discolored in advanced stages. The lesions vary in length from a trace to 28 centimeters.

Infection may be induced thru the use of infested soil, by means of spore suspensions ...


A Study Of Sclerospora Graminicola (Sacc.) Schroet. On Setaria Viridis (L.) Beauv. And Zea Mays L., I. E. Melhus, F. H. Van Haltern, Donald E. Bliss 2017 Iowa State College

A Study Of Sclerospora Graminicola (Sacc.) Schroet. On Setaria Viridis (L.) Beauv. And Zea Mays L., I. E. Melhus, F. H. Van Haltern, Donald E. Bliss

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Conidial sporulation of Sclerospora graminicola has been observed in the day time occurring naturally in the field and under artificial conditions in the laboratory. The period required for the development of mature conidia lies between 4 hours 35 minutes and 111/2 hours. The conditions which seem necessary for the production of conidia, whether during the day or night, are: a completely saturated atmosphere, turgid host leaves, a slight moisture film on the surface of the leaves and a temperature ranging between 8° and 27 °C.

When flooded into a drop of water immediately after being discharged, conidia were ...


Studies On Nitrification And Its Relation To Crop Production On Carrington Loam Under Different Treatment, Lewis W. Erdman, Harry Humfeld 2017 Iowa State College

Studies On Nitrification And Its Relation To Crop Production On Carrington Loam Under Different Treatment, Lewis W. Erdman, Harry Humfeld

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In the summer of 1926 certain plots on the Agronomy Farm of the Iowa Agricultural Experiment Station were sampled four times and studies made on the amount of nitrates, moisture, and the reaction of the soils at the time of sampling and the nitrifying power of the soils as determined by three methods, (a) nitrification of the soils' own nitrogen, (b) nitrification of ammonium sulfate and (c) nitrification of ammonium sulfate in the presence of calcium carbonate. The reaction of the soils was also determined after the 30 days of incubation. The following conclusions seem to be justified from this ...


The Numbers Of Microorganisms In Carrington Loam As Influenced By Different Soil Treatments, Lewis W. Erdman 2017 Iowa State College

The Numbers Of Microorganisms In Carrington Loam As Influenced By Different Soil Treatments, Lewis W. Erdman

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

This bulletin presents the results of studies made on the soils from a number of field plots which are located on Carrington loam and have been under definite soil treatments and cropping systems for a period of 12 years. The following conclusions seem justified:

1. The highest numbers of bacteria were found in the soils in March, 1926. In 1925 the highest numbers of bacteria were found in July and November. Great fluctuations in numbers of bacteria occurred from one sampling to another.

2. The greatest number of fungi was found in the soils in November, 1924. The numbers gradually ...


Bioaccumulative And Toxic Effects Of Ingested Clean And Pbt-Saturated Microplastics On Oryzias Latipes (Japanese Medaka Fish): Method Development Towards Physiological And Chemical Analysis, Kieran O'Neil 2017 University of Puget Sound

Bioaccumulative And Toxic Effects Of Ingested Clean And Pbt-Saturated Microplastics On Oryzias Latipes (Japanese Medaka Fish): Method Development Towards Physiological And Chemical Analysis, Kieran O'Neil

Honors Program Theses

Microplastics are major and often overlooked components of this global accumulation of plastic debris. Recent marine surveys in Puget Sound have found microplastic contamination in benthic communities such as forage fish and mussel populations, indicating the prevalence of microplastics throughout the water column and marine environment. In light of rapid and increasing accumulation of plastic debris and chemical pollutants in marine environments, the transfer of toxic chemicals to biota via microplastic ingestion is of significant concern. Preliminary research on the toxic effects of pollutants on biotic systems has identified microplastics as a transport mechanism for persistent bioaccumulative toxins (such as ...


Evolvability: What Is It And How Do We Get It?, Matthew Moreno 2017 University of Puget Sound

Evolvability: What Is It And How Do We Get It?, Matthew Moreno

Honors Program Theses

Biological organisms exhibit spectacular adaptation to their environments. However, another marvel of biology lurks behind the adaptive traits that organisms exhibit over the course of their lifespans: it is hypothesized that biological organisms also exhibit adaptation to the evolutionary process itself. That is, biological organisms are thought to possess traits that facilitate evolution. The term evolvability was coined to describe this type of adaptation. The question of evolvability has special practical relevance to computer science researchers engaged in longstanding efforts to harness evolution as an algorithm for automated design. It is hoped that a more nuanced understanding of biological evolution ...


Time Factors In Relation To The Acquisition Of Food By The Honeybee, O. W. Park 2017 Iowa State College

Time Factors In Relation To The Acquisition Of Food By The Honeybee, O. W. Park

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

1. Of all the various methods for marking honeybees tried by the author, the one found best adapted for the present investigation was that of applying pigment combined with white shellac in alcohol.

2. A contrivance of simple construction was devised which, when placed in the entrance of a hive, caused practically every incoming and outgoing bee to pass thru the entrance dorsal side up, thereby enabling the observer to detect the marked bees.

3. A suitable method was discovered for distinguishing between nectar-carriers and water-carriers without injury to the bee.

4. The average speed determined for the flight of ...


The Influence Of Temperatures And Certain Other Factors Upon The Percentage Of Fat In Milk, Earl Weaver, C. A. Matthews 2017 Iowa State College

The Influence Of Temperatures And Certain Other Factors Upon The Percentage Of Fat In Milk, Earl Weaver, C. A. Matthews

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The percentage of fat in cows' milk varied definitely with seasonal changes. The fat test was highest during the first half of winter, or January. It gradually declined to the second half of summer, August and early September, when the lowest test occurred, and then it rose rather rapidly in the fall.

Ayrshire and Holstein tests were approximately 0.6 percent lower in the second half of summer than in the first half of winter. Guernsey and Jersey tests were approximately 1.1 percent lower.

The butterfat tests were found to be lower with higher outside and inside temperatures.

As ...


Studies On Starters, B. W. Hammer, M. P. Baker 2017 Iowa State College

Studies On Starters, B. W. Hammer, M. P. Baker

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

For a number of years the dairy section of the Iowa Agricultural Experiment Station has devoted considerable effort to an investigation of starters. This has seemed advisable because good starters have been shown to be very helpful in improving the quality of butter, which is the important dairy product of the state.


Gene-Specific Histone Acetylation And Dna Methylation Changes In Somatic Cell Nuclear Transfer (Scnt) Embryos, Kenneth L. White 2017 Utah State University

Gene-Specific Histone Acetylation And Dna Methylation Changes In Somatic Cell Nuclear Transfer (Scnt) Embryos, Kenneth L. White

Funded Research and Data

No abstract provided.


Transfer Of Residence With Continued Occupancy, Neil Harl 2017 Selected Works

Transfer Of Residence With Continued Occupancy, Neil Harl

Neil E. Harl

The rule has been well established that a transfer of a residence to a spouse with occupancy by the transferring spouse until death, would not result in inclusion of the value of the residence in the transferor's gross estate under a theory of a retained life estate. The courts have consistently required proof of at least an implied agreement between the husband and wife (assuming the transferring spouse continued occupancy) before that spouse is held to have retained possession or enjoyment so as to require inclusion of the residence in the gross estate. If the transferor is to prevail ...


When Discharge Of Indebtedness Occurs If The Debtor Is Not In Bankruptcy, Neil Harl 2017 Selected Works

When Discharge Of Indebtedness Occurs If The Debtor Is Not In Bankruptcy, Neil Harl

Neil E. Harl

As was noted in the March 30, 1990 issue of Agricultural Law Digest, whether discharge of indebtedness occurs for debtors in bankruptcy depends upon the chapter of the Bankruptcy Code. For Chapter 12 debtors, discharge of indebtedness takes place upon completion of payments under the plan. For debtors not in bankruptcy, the rules for when discharge of indebtedness take place are different and the consequences are also quite different.


Single Class Of Stock In S Corporations, Neil Harl 2017 Selected Works

Single Class Of Stock In S Corporations, Neil Harl

Neil E. Harl

Almost from the day of enactment of Subchapter S of the Internal Revenue Code in 1958, the single class of stock requirement has generated questions that have led to extensive litigation, repeated attempts to address the issues by regulation and numerous rulings in an effort to resolve the issues involved. The major area of concern has been the line between debt securities and equity interests, particularly where the debt securities represented shareholder loans.


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