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The Manuscript Works Of S. Fred Prince (1857-1951), Sarah Burke Cahalan, Jason W. Dean 2018 University of Dayton

The Manuscript Works Of S. Fred Prince (1857-1951), Sarah Burke Cahalan, Jason W. Dean

Marian Library/IMRI Faculty Publications

S. Fred Prince, a botanical illustrator and amateur scientist, is a largely unknown artist whose work on the American landscape demonstrates his eligibility to be considered in the lineage of self-taught illustrator-naturalists such as Mark Catesby and Genevieve Jones. In this article, we present a survey of extant Prince materials identified at time of writing, describing their contents and physical characteristics. Beyond this survey and description, we also provide a biographical sketch and timeline of Prince's life.


Alnus Maritima: A Rare Woody Species From The New World, James A. Schrader, William R. Graves 2017 Iowa State University

Alnus Maritima: A Rare Woody Species From The New World, James A. Schrader, William R. Graves

William R Graves

Although first introduced into cultivation in the 1870's and praised for its ornamental character, Alnus maritima (Marsh.) Muhl. ex Nutt. (seaside alder) remains a rare woody species with unrealised potential. The ornamental promise of A. maritima was first recognised by Thomas Meehan, an Englishman who emigrated to the United States (Philadelphia, Pa). In 1848 after serving for two years at the Royal Botanic Gardens, Kew, Mr. Meehan was best known as the publisher of Meehan's Monthly (1891- 1902) and as the author of The American Handbook of Ornamental Trees (1853) and The Native Flowers and Ferns of the ...


Effects Of Light And Soil Moisture On Forest Tree Seedling Establishment, G. E. Gatherum, A. L. McComb, W. E. Loomis 2017 Iowa State University of Science & Technology

Effects Of Light And Soil Moisture On Forest Tree Seedling Establishment, G. E. Gatherum, A. L. Mccomb, W. E. Loomis

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The present studies were designed to aid in the solution of forest tree seedling establishment problems common to stand conversion practices in Iowa. The primary objectives were: (1) to determine the minimum treatment needed to insure successful survival and growth; (2) to study the relationships of light and soil moisture in plant competition resulting from stand conversion; and (3) to evaluate five species of conifers - European larch, Scotch pine, eastern white pine, Norway spruce and red pine - for adaptability to region, site and underplanting.

Field studies were made at the Brayton Forest in northeastern Iowa and consisted of ( 1 ) practical ...


A Comparison Of Methods And Blowers For The Purity Analysis Of Kentucky Bluegrass Seed, L. E. Everson 2017 Iowa State College

A Comparison Of Methods And Blowers For The Purity Analysis Of Kentucky Bluegrass Seed, L. E. Everson

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Three methods for conducting purity analysis of Kentucky bluegrass seed were compared. They were: (1) hand method-preliminary separation made with a blower and the final differentiation of questionable florets by hand, (2) standard method-separation with a blower using the same pure seed criteria as for the hand method and (3) climax method-separation with a blower at a level which gives the maximum pure live seed percentage.

Three blowers (the Ottawa, Erickson and Ames) were included in the study. Four laboratories cooperated in the investigation. Variations within laboratories were compared; variations between laboratories were not considered.


Inheritance Of Resistance To Specific Races Of Crown And Stem Rust, To Helminthosporium Blight, And Of Certain Agronomic Characters Of Oats, S. C. Litzenberger 2017 University of Alaska, Fairbanks

Inheritance Of Resistance To Specific Races Of Crown And Stem Rust, To Helminthosporium Blight, And Of Certain Agronomic Characters Of Oats, S. C. Litzenberger

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Observed segregation for reaction to stem rust in several oat crosses was on a monohybrid basis except in the cross Sac x Hajira-Joanette where segregation was observed to be on a three-factor basis. A mesothetic type of reaction to the composite of races 2 and 8 was observed in seedling plants classified as susceptible in two crosses, Mindo x Tama and Sac x Hajira-Joanette. Since no segregation was observed for reaction to race 2 in either of the two crosses, one factor pair for resistance to race 8 must be allelic to the one governing resistance to race 2 possessed ...


Investigations In Seed Classification By Family Characteristics, Duane Isely 2017 Iowa State College

Investigations In Seed Classification By Family Characteristics, Duane Isely

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The need to identify seeds may be encountered by individuals in several fields of biological endeavor. The greatest use of seed taxonomy in botanical and agronomic work is undoubtedly relative to seed analysis. One of the most important functions of the analyst is the recognition and designation of weed seeds occurring incidentally with agricultural seeds. The competent seed analyst must be able to recognize the seeds of a great many more or less common plants and should likewise possess the means of identifying, at least approximately, numerous less common ones. Application of seed taxonomy is not, however, confined solely to ...


Observations On Mold Development And On Deterioration In Stored Yellow Dent Shelled Corn, G. Semeniuk, C. M. Nagel, J. C. Gilman 2017 Iowa State College

Observations On Mold Development And On Deterioration In Stored Yellow Dent Shelled Corn, G. Semeniuk, C. M. Nagel, J. C. Gilman

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Examinations during 3 consecutive years were made in Iowa for mold development in yellow dent shelled corn stored in steel bins of 1,000-2,740 bushel capacities. The first was made during August and September 1941, the second in March 1942 and the third in April 1943. Different bins were examined in each of the three inspections. Bins reportedly containing some corn of 14 percent or more moisture were examined and probed in the first examination, those with corn of 13.5 percent or more moisture in the second examination; no selection of bins for moisture content was made in ...


Germinability Of Treated And Untreated Lots Of Vegetable Seed In Pythium-Infested Soil And In The Field, R. H. Porter 2017 Iowa State College

Germinability Of Treated And Untreated Lots Of Vegetable Seed In Pythium-Infested Soil And In The Field, R. H. Porter

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Seed lots of beans, beets, carrots, onions, peas, popcorn, soybeans, spinach, sweet corn and tomatoes were obtained from several sources. Tests with treated and untreated seed were made in sand, blotters or towels using the standard methods recommended in rules for seed testing. In addition, tests were made in soil naturally infested with Pythium debaryanum Hesse and Pythium graminicola Subr. as well as in the field. Temperature and moisture conditions in the field were occasionally optimum or nearly so but more frequently the temperature-moisture relationship was such as to provide an environment far below the optimum for germination. The data ...


Further Experiments With The Iowa Air Blast Seed Separator For The Analysis Of Small-Seeded Grasses, Ewert Åberg, R. H. Porter, Wayne A. Robbins 2017 Iowa State College

Further Experiments With The Iowa Air Blast Seed Separator For The Analysis Of Small-Seeded Grasses, Ewert Åberg, R. H. Porter, Wayne A. Robbins

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In recent years attempts, have been made in Europe and North America to improve seed laboratory machines used for the separation of chaff from heavy seeds in grasses. The most important European contribution is probably the Gilchrist seed separator" used at the seed testing station in Edinburgh, Scotland. The Holland (Leendertz) separator has some merit, but its chief weakness as shown by Porter (7) was the inconstant speed of the motor which made it. impossible to deliver the same volume of air through the separator tube each time the valve was opened to a given point. Replacement of the motor ...


Epiphytology And Control Of Sugar Beet Leaf Spot Caused By Cercospora Beticola Sacc., C. M. Nagel 2017 Iowa State College

Epiphytology And Control Of Sugar Beet Leaf Spot Caused By Cercospora Beticola Sacc., C. M. Nagel

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Control measures for Cercospora beticola Sacco in the past usually have been limited to the application of fungicides either as a dust or spray. The use of fungicides for the control of leaf spot on a commercial basis has not always proved effective, practical and economical in the Upper Mississippi Valley. Because of this fact the problem was approached recently from another angle, namely, the development of leaf spot in relation to modified cultural practices. The modification employed in these studies consists of spacing the plants a greater distance apart within and between' the rows, thereby inducing a change in ...


Testing The Quality Of Seeds For Farm And Garden, R. H. Porter 2017 Iowa State College

Testing The Quality Of Seeds For Farm And Garden, R. H. Porter

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The yield and quality of a crop to be harvested depend in part on the quality of the seed that is planted. Seed quality is a relative term. It is based on a number of conditions, the more important of which are purity of the seed as expressed in terms of freedom from weed seed and other impurities, viability, freedom from seed-borne organisms and ability to resist infection by soil-borne organisms. Many factors and conditions affect seed quality, including crop sequence, type and frequency of cultivation, climate, time of harvesting, genetic constitution of the seed, variety of seed planted, storage ...


Soil-Inhabiting Fungi Attacking The Roots Of Maize, Wen-Chun Ho 2017 Iowa State College

Soil-Inhabiting Fungi Attacking The Roots Of Maize, Wen-Chun Ho

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Several pathogens were known to attack the roots of maize, but their effect was not well understood. These organisms seemed to attack not only singly but in combination with one another and in a certain succession, influenced by environmental conditions.

The present study was undertaken to investigate the relative importance of (a) various pathogens attacking seeds and seedlings in their early stages of development, (b) symptoms manifested by each pathogen singly and in combination, (c) the injuries produced by each pathogen under laboratory, greenhouse and field conditions, and (d) the influence of environmental factors upon the succession of pathogens on ...


Vegetative Development Of Inbred And Hybrid Maize, M. E. Paddick 2017 Iowa State College

Vegetative Development Of Inbred And Hybrid Maize, M. E. Paddick

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The study herein reported consists of observations on the vegetative development of maize with special emphasis on leaf production. The objective has been to obtain a better picture of the dynamics of hybrid vigor as expressed through growth processes such as rate, correlation, sequence and final size. Most of the results were obtained from two Iowa inbred strains and their reciprocal hybrids, and for that reason may not be entirely characteristic of a general population.

Specific researches on growth and heterosis of maize are so numerous as to prohibit any but general comment. Orthodox explanations of hybrid vigor or heterosis ...


Influence Of Cultural Factors On Alfalfa Seedling Infection By Pythium Debaryanum Hesse, W. F. Buchholtz 2017 Iowa State College

Influence Of Cultural Factors On Alfalfa Seedling Infection By Pythium Debaryanum Hesse, W. F. Buchholtz

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

It is well recognized that considerable care must be exercised on some soils to establish stands of small-seeded legumes, notably alfalfa and red clover and sometimes sweet clover. Farmers generally are aware of the necessity of sowing a good grade of seed of a hardy variety on a well-prepared seedbed under a light nurse crop, after the soil, if acid, has been limed. The common rate of seeding alfalfa is 10-15 pounds per acre, which, with good-quality seed, provides for 50-75 seeds per square foot. Second year stands in Iowa, however, rarely contain more than 10 plants per square foot ...


Drought Effects On Composition And Yield For Corn Stover, Mixed Grasses, And Miscanthus As Bioenergy Feedstocks, Rachel Emerson, Amber Hoover, Allison Ray, Jeffrey Lacey, Marnie Cortez, Courtney Payne, Douglas L. Karlen, Stuart Birrell, David Laird, Robert Kallenbach, Josh Egenolf, Matthew Sousek, Thomas Voigt 2017 Idaho National Laboratory

Drought Effects On Composition And Yield For Corn Stover, Mixed Grasses, And Miscanthus As Bioenergy Feedstocks, Rachel Emerson, Amber Hoover, Allison Ray, Jeffrey Lacey, Marnie Cortez, Courtney Payne, Douglas L. Karlen, Stuart Birrell, David Laird, Robert Kallenbach, Josh Egenolf, Matthew Sousek, Thomas Voigt

Douglas L Karlen

Drought conditions in 2012 were some of the most severe in recent history. The purpose of this study is to examine the impact of drought on quality, quantity, and theoretical ethanol yield (TEY) of three bioenergy feedstocks, corn stover, mixed grasses from Conservation Reserve Program lands, and Miscanthus × giganteus. To assess drought effects on these feedstocks, samples from 2010 (minimal to no drought) and 2012 (severe drought) were compared from multiple locations in the US. In all feedstocks, drought significantly increased extractives and reduced structural sugars and lignin; subsequently, TEYs were reduced 10–15%. Biomass yields were significantly reduced for ...


The Viability And Germination Of Seeds Of Convolvulus Arvensis L. And Other Perennial Weeds, E. O. Brown, R. H. Porter 2017 Iowa State College

The Viability And Germination Of Seeds Of Convolvulus Arvensis L. And Other Perennial Weeds, E. O. Brown, R. H. Porter

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

From 1935 to 1939 inclusive, laboratory and field studies were made of the production, viability, impermeability, longevity and germination of seeds of Convolvulus arvensis L. and of other deep-rooted perennial weeds. A summary of the results is as follows:

Bindweed plants, Convolvulus arvensis, produced an abundance of seed in seasons of high temperature and low rainfall. Periods of cloudy weather restricted blossoming and seed production.

Production of normal seedlings by seeds, immediately after collection on the plants, varied from 7 to 24 percent, impermeability in the same collections varied from 28 to 91 percent and dead seeds ranged from 2 ...


Pythium Graminicola Subr. On Barley, Wen-Chun Ho, C. H. Meredith, I. E. Melhus 2017 Iowa State College

Pythium Graminicola Subr. On Barley, Wen-Chun Ho, C. H. Meredith, I. E. Melhus

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Pythium graminicola was constantly isolated from infected roots of barley grown on the experimental plots of the Northern Iowa Agricultural Experimental Farm, Kanawha, and from plants grown on the plots at the Agronomy Farm at Ames, Iowa, in 1936 to 1939, inclusive.

The symptoms of Pythium graminicola on barley were: Seed decay, seedling blight, root necrosis, yellowing and curling of leaves and stunting. Pythium root necrosis was very severe in 1936 and in 1938. The injury to the seedlings was greater at high temperature than at low. The pathogen grew very slowly at 15° c., which may in part explain ...


An Inhibitor Produced By Diplodia Zeae (Schw.) Lev., G. C. Kent 2017 Iowa State College

An Inhibitor Produced By Diplodia Zeae (Schw.) Lev., G. C. Kent

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Evidence has been presented indicating that Diplodia zeae in its normal growth produced an endocellular substance inhibitive to its own growth. This substance reduced by two-thirds the growth of Diplodia zeae on agar to which it had been added. Germination of spores of Diplodia zeae was greatly reduced.

The inhibitive action was not destroyed by correction of hydrogen- ion concentration or sugar concentration in the solution of the inhibitor.

The inhibitor retained its action after moderate dilution with distilled water and after boiling or autoclaving at 15 pounds pressure for 1 hour.

The action of the inhibitor was retained after ...


Experiments On The Control Of European Bindweed (Convolvulus Arvensis L.), A. L. Bakke 2017 Iowa State College

Experiments On The Control Of European Bindweed (Convolvulus Arvensis L.), A. L. Bakke

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

European bindweed (Convolvulus arvensis L.) is found in every county in Iowa. It is more prevalent in the western and northwestern parts of the state where 100-acre tracts are common. Many farms have become heavily infested during the last 10 years. European bindweed reduces crop yields, increases the cost of production, threatens land which is free of weeds and finally reduces all land values in its vicinity. It is a serious pest not only in Iowa but also in South Dakota, Minnesota, Nebraska, Kansas, Colorado, Idaho, Washington, Utah and California. It occurs in northeastern North America and sparingly in southeastern ...


Relation Of Root Reserves To Control Of European Bindweed Convolvulus Arvensis L., A. L. Bakke, W. G. Gaessler, W. E. Loomis 2017 Iowa State College

Relation Of Root Reserves To Control Of European Bindweed Convolvulus Arvensis L., A. L. Bakke, W. G. Gaessler, W. E. Loomis

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

European or field bindweed was recognized as a serious pest in Kansas as early as 1908 (13). Since that time it has spread rapidly and has come to be classed as the worst weed of the prairie and Great Plains States (12, 13, 21, 25). Patches of the weed in Nebraska have spread 13 feet in a year by vegetative growth, and the roots have penetrated to a depth of 20 feet (12). Even short sections of the root, carried from infested areas on cultivation machinery, will grow and establish new centers of infestation. The plant fruits freely, particularly in ...


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