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Relation Of The Barberry To Stem Rust In Iowa, I. E. Melhus, L. W. Durrell, R. S. Kirby 2017 Iowa State College

Relation Of The Barberry To Stem Rust In Iowa, I. E. Melhus, L. W. Durrell, R. S. Kirby

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

It has been definitely known since 1865 that the European barberry is the alternate host of stem rust (Puccinia graminis); yet the exact relation of this shrub to the annual appearance of stem rust of our grains and grasses is not well understood. Tulasne brothers (18) (1847), de Bary (1) (1865) and others rarely described and figured the morphology of teleutosporic germination. They gave little consideration, however, to the questions as to what environmental conditions influence such germination and the production, dissemination, viability and growth of the sporidia—conditions that have a fundamental bearing on serious attacks of stem rust.


Effect Of Seasonal Conditions And Soil Treatment On Bacteria And Molds In Soil, P. E. Brown, W. V. Halversen 2017 Iowa State College

Effect Of Seasonal Conditions And Soil Treatment On Bacteria And Molds In Soil, P. E. Brown, W. V. Halversen

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The study of the microorganic population of the soil has revealed many interesting facts but none more significant nor of more far-reaching importance than the discovery that molds occur in soils and perform various functions which directly or indirectly exert considerable influence on soil fertility.

The occurrence and activities of bacteria in the soil has been the subject of extensive inquiry and much knowledge along this line has been accumulated. These organisms have been found to occur in large numbers in practically all soils and to play a prominent part in the reactions which must necessarily take place in soils ...


The Volatile Acid Production Of Starters And Of Organisms Isolated From Them, B. W. Hammer, D. E. Bailey 2017 Iowa State College

The Volatile Acid Production Of Starters And Of Organisms Isolated From Them, B. W. Hammer, D. E. Bailey

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The introduction of starters represents one of the distinct advances made in the field of dairying. Altho starters have been widely used their careful study has been very much neglected and the men who handle them extensively are often unable to explain the results obtained. The increasing use that is being made of starters in the manufacture of butter, various types of cheese, and fermented milk drinks makes it essential that they be studied with the idea of securing information regarding the reasons for the variations that occur in the quality. The present paper gives the results secured in a ...


Studies On Formation Of Gas In Sweetened Condensed Milk, B. W. Hammer 2017 Iowa State College

Studies On Formation Of Gas In Sweetened Condensed Milk, B. W. Hammer

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In foods treated in various ways for their preservation, microorganisms that can resist conditions that the great majority of micro-organisms cannot withstand, occasionally develop and bring about undesirable changes. These changes are common in foods that have been subjected to heat and are the results of the presence of organisms that have the ability to resist temperatures that usually effectively sterilize the product in question. In sweetened condensed milk, which is presumably preserved by the addition of high percentages of sucrose, abnormal changes sometimes occur as a result of the presence of organisms that have the ability to develop in ...


Studies On Color In Swine, Orren Lloyd-Jones, John M. Evvard 2017 Iowa State College

Studies On Color In Swine, Orren Lloyd-Jones, John M. Evvard

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In 1913 an investigation was started at the Iowa experiment station in ' the laboratories of the animal husbandry section, which aimed toward aiding in a genetic analysis of the belt pattern in Hampshire swine. The crosses, which have already involved many hundreds of pigs, have dealt entirely with the Duroc-Jersey and the Hampshire breeds. The breed standard describes the Hampshires as "black with the exception of a white belt encircling the body, including the fore legs," while the Duroc-Jersey is described as being "cherry red without other admixtures." The white belt of the Hampshire is far from being a fixed ...


Studies On Abnormal Evaporated Milk, B. W. Hammer 2017 Iowa State College

Studies On Abnormal Evaporated Milk, B. W. Hammer

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Evaporated milk, which depends for its keeping quality on the destruction of the con tamed micro-organisms by heat, occasionally spoils because of the presence of one or more organisms that resist the exposure employed in the sterilizer. The milk may undergo coagulation, gas formation or various other changes depending on the organism or organisms present. In this paper an unusual type of spoiling, mainly evident as an abnormal flavor and odor, altho there sometimes was coagulation, is reported and the organism causing it is described.


Appetite As A Guide In Feeding Dairy Calves, A. C. McCandlish 2017 Iowa State College

Appetite As A Guide In Feeding Dairy Calves, A. C. Mccandlish

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Appetite, as an indicator of physiological needs, has been minimized by many investigators in the field of human and animal nutrition. From the beginning the whole animal kingdom h.as been controlled in its feeding problems only by appetite and environmental limitations of the food supply. Consequently, even tho the role of appetite be not of great importance under artificial experimental conditions, yet, if the broad facts of the case, the continued existence and multiplication of man and other animals, after countless aeons of feeding with appetite as their sole guide, be taken into consideration, it must be recognized as ...


The Effect Of Crown Gall Upon A Young Apple Orchard, Laurenz Greene, I. E. Melhus 2017 Iowa State College

The Effect Of Crown Gall Upon A Young Apple Orchard, Laurenz Greene, I. E. Melhus

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

This bulletin contains a record of progress in a study of the effect of crown gall upon an apple orchard from the time it is set out until it becomes of bearing age. The relative influence of various types of galls upon the annual growth of the trees has been considered and some data have been gathered on the amount and position of the galls in relation to the growth and percentage of stand in the orchard. Also, the susceptibility of certain kinds of apple trees to crown gall after they have been planted in the orchard, and the persistence ...


Milk As The Sole Diet Of Ruminants, A. C. McCandlish 2017 Iowa State College

Milk As The Sole Diet Of Ruminants, A. C. Mccandlish

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

From time imemmorial milk has been regarded as the food best adapted to the complete nourishing of mammalia. It is the sole diet of all mammals during the earlier part of their postnatal development and is recognized as an excellent staple in the diet of the adult human, especially in the case of invalids. On the farm it is used extensively in the feeding of young animals, and in the case of the hog it is fed in large quantities to more mature individuals.

Within the last decade many investigations have been made concerning the nutritive value of milk and ...


Studies On The Clarification Of Milk—Ii, B. W. Hammer, A. J. Hauser 2017 Iowa State College

Studies On The Clarification Of Milk—Ii, B. W. Hammer, A. J. Hauser

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In a former publication of this station the results obtained in a study of the clarification of milk with the DeLaval clarifier are presented. The data show: first that commonly, altho by no means constantly, the plates poured from clarified milk contained a larger number of colonies than plates poured from Unclarified milk of the same lot; this was undoubtedly due to a breaking up of the clumps of organisms and should be spoken of as an 'apparent increase since the large number of bacteria in the slime indicates that there was actually an elimination of organisms; second, that there ...


Composition And Digestibility Of Sudan Grass Hay, W. G. Gaessler, A. C. McCandlish 2017 Iowa State College

Composition And Digestibility Of Sudan Grass Hay, W. G. Gaessler, A. C. Mccandlish

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

ThE.J introduction of Sudan grass (Andropogon sorglwrn var.) into the United States took place less than nine years ago, but since then this .crop has become widely known and its popularity is rapidly increasing. Sudan grass, being an annual, does not make a good pasture plant, but gives excellent results as a hay or soiling crop; it might also be successfully made into silage if mixed with a legume.


Soil Inoculation With Azotobacter, Paul Emerson 2017 Iowa State College

Soil Inoculation With Azotobacter, Paul Emerson

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Following the discovery of the nitrogen fixing powers of the symbiotic bacteria in the soil, early investigators found that the power of utilizing the free atmospheric nitrogen was not confined to the symbiotic bacteria alone. They noted increases in soils which had borne no legumes and they found that fallow soils in particular increased appreciably in nitrogen content. These . facts stimulated researches which led to the discovery of many forms of bacteria which are able, when growing alone, to fix nitrogen from the air. The chief of these is now known as the azotobacter group.


Effects Of Certain Alkali Salts On Ammonification, P. E. Brown, D. R. Johnson 2017 Iowa State College

Effects Of Certain Alkali Salts On Ammonification, P. E. Brown, D. R. Johnson

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The occurrence of so-called" alkali spots" in certain Iowa soils has been nnted in recent publications, these spots are found only in the Wisconsin drift soil area, in association with peat deposits, and are the result of course of peculiarly poor drainage conditions. It is unnecessary here to consider further the causes of these formations or the methods which should be followed in reclaiming the areas affected as these points have been discussed in the publications referred to. It will be sufficient to call attention to the results of the chemical studies of the spots and to consider briefly some ...


Studies On The Crown Rust Of Oats, I. E. Melhus, L. W. Durrell 2017 Iowa State College

Studies On The Crown Rust Of Oats, I. E. Melhus, L. W. Durrell

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

During some seasons crown rust of oats (Puccinia coronata Corda) becomes a serious limiting factor in successful oat production in Iowa. It is not uncommon to have this rust occur in epidemic form one year and the following year to have only a small amount of the disease present. Up to the present time the various factors which influence the growth, development and epidemiology of this rust have not been definitely studied.


Some Taxonomic Corrections To The Genus Tityus C. L. Koch, 1836 (Scorpiones: Buthidae) In Hispaniola, Greater Antilles, Rolando Teruel 2017 Museo de Historia Natural “Tomás Romay”

Some Taxonomic Corrections To The Genus Tityus C. L. Koch, 1836 (Scorpiones: Buthidae) In Hispaniola, Greater Antilles, Rolando Teruel

Euscorpius

In the present paper, the taxonomic status of several Hispaniolan members of the genus Tityus C. L. Koch, 1966 is revised after examination of almost all primary types and abundant supplementary material. This resulted in six new synonymies, which involve both extant and fossil species. The extant taxa herein synonymized are Tityus anasilviae Armas et Abud, 2004 under Tityus ottenwalderi Armas, 1999, Tityus bahoruco Teruel et Armas, 2006 under Tityus crassimanus (Thorell, 1876), Tityus ebanoverde Armas, 1999 under Tityus elii Armas et Marcano, 1992, and Tityus septentrionalis Armas et Abud, 2004 under Tityus portoplatensis Armas et Marcano, 1992. The fossil ...


Sisquoc, Diseños 111, Glo 348, Santa Barbara County, And Associated Historical Documents, 2017 California State University, Monterey Bay

Sisquoc, Diseños 111, Glo 348, Santa Barbara County, And Associated Historical Documents

Santa Barbara County

Diseños - Hand-drawn Spanish-Mexican map demonstrating the physical boundaries of land granted to Mexican citizens by the Spanish or Mexican.

Expediente – Hand-written Spanish-Mexican land grant document issued to Mexican citizens in Alta California for land in Alta-California.

Work Progress Administration Abstract (WPA Abstract) – A summary document prepared in 1938 under the Work Progress Administration program detailing the history of a rancho beginning with the Spanish-American land through the U.S. patenting process.

Hoffman Notes -- Summary of information concerning claims made for the Rancho lands from the Appendix containing the Table of Land Claims in the Reports of Land Cases by Ogden ...


Suey, Diseños 41, Glo 360, Santa Barbara And San Luis Obispo Counties, And Associated Historical Documents, 2017 California State University, Monterey Bay

Suey, Diseños 41, Glo 360, Santa Barbara And San Luis Obispo Counties, And Associated Historical Documents

Santa Barbara County

Diseños - Hand-drawn Spanish-Mexican map demonstrating the physical boundaries of land granted to Mexican citizens by the Spanish or Mexican.

Expediente – Hand-written Spanish-Mexican land grant document issued to Mexican citizens in Alta California for land in Alta-California.

Work Progress Administration Abstract (WPA Abstract) – A summary document prepared in 1938 under the Work Progress Administration program detailing the history of a rancho beginning with the Spanish-American land through the U.S. patenting process.

Hoffman Notes -- Summary of information concerning claims made for the Rancho lands from the Appendix containing the Table of Land Claims in the Reports of Land Cases by Ogden ...


Cytotoxic And Antimicrobial Effects Of Silver-Containing Surfaces, Sarah Goderecci 2017 Rowan University

Cytotoxic And Antimicrobial Effects Of Silver-Containing Surfaces, Sarah Goderecci

Theses and Dissertations

This study examines applications of sputtered silver coatings as alternatives to traditional antibiotic treatments. Given the increase in reports of antibiotic-resistant bacteria, new treatments and coatings for in-dwelling medical devices such as catheters and orthopedic implants are necessary. Silver oxide films were deposited onto Ti surfaces to examine the efficacy of such coatings against a variety of bacterial species both in vitro and in vivo. Bacterial growth studies showed that coatings exhibited antimicrobial activity against a range of bacterial species acting either in a bacteriostatic or bactericidal mechanism, depending on the target. Limited toxicity to in vitro mammalian cells was ...


Yellow Corn, Wet Soils, And N Loss – Part 2, John E. Sawyer 2017 Iowa State University

Yellow Corn, Wet Soils, And N Loss – Part 2, John E. Sawyer

John E. Sawyer

Last week (June 19) I provided some observations on corn growth and response to nitrogen (N) applied in an anhydrous ammonia study being conducted at the ISU research farm between Ames and Boone. Following are some observations one week later (June 26, 2008).


Update To Iowa Phosphorus, Potassium And Lime Recommendations, Antonio P. Mallarino, John E. Sawyer 2017 Iowa State University

Update To Iowa Phosphorus, Potassium And Lime Recommendations, Antonio P. Mallarino, John E. Sawyer

John E. Sawyer

This article highlights revisions to Iowa State University (ISU) soil-test interpretations and application guidelines for phosphorus (P), potassium (K) and lime in an update of extension publication PM 1688 "A General Guide for Crop Nutrient and Limestone Recommendations in Iowa." The printed version of this publication will not be ready until later in the fall and the online version should be posted by early October at the Extension Online Store and on the Soil Fertility web site. Field research is conducted continuously to assure that nutrient management suggestions are up to date. This research has indicated that some recommendations should ...


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