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Feasibility Of Commercial Vegetable Production In Western Iowa As A Boost To Agricultural And Rural Development, M. Leron Robbins, Kermit J. Hildahl
Feasibility Of Commercial Vegetable Production In Western Iowa As A Boost To Agricultural And Rural Development, M. Leron Robbins, Kermit J. Hildahl
Proceedings of the Iowa Academy of Science
Yield and quality of several kinds of vegetables grown on plots in Iowa's Missouri River Valley were high, indicating great potential for commercial production of high-value crops. The availability of water; the light, fertile soils present in parts of the Valley and the reasonably long growing season make the Valley potentially an even greater food-producing area than it is presently. Commercial vegetable production in the Valley could be expected to increase farm income, stimulate the economy of local small towns, and reduce the migration of rural people to urban areas.
Cover - Table Of Contents
Proceedings of the Iowa Academy of Science
No abstract provided.
Automatic Recording Of Conductance Titrations, George E. Knudson, David Langhus
Automatic Recording Of Conductance Titrations, George E. Knudson, David Langhus
Proceedings of the Iowa Academy of Science
An electrical circuit and a method are described for the automatic recording of conductance titrations. The off-balance bridge signal produces very sharp peaks at the end point in acid-base titrations.
The Absorption Of Chlorinated Hydrocarbon Insecticides By Frog Skin, Timothy O. Kaiser, Jewett Dunham
The Absorption Of Chlorinated Hydrocarbon Insecticides By Frog Skin, Timothy O. Kaiser, Jewett Dunham
Proceedings of the Iowa Academy of Science
The absorption of lindane, heptachlor, aldrin, dieldrin and p, p' DDT by frog skin has been studied. Various experiments indicate that water-soluble fractions of these insecticides are selectively absorbed by the skin. The relative quantities of insecticides absorbed appear to be partially related to their water solubilities. Selected studies using isolated frog skin indicate that the passage of insecticides across the skin does not alter the electrical potential difference across the skin. The observed results are discussed with respect to the accumulation of these chemicals in the tissues of the frogs.
Age, Iq Effects And Reliability Of A Stereoscopic Test For Field Dominance, David M. Pierce
Age, Iq Effects And Reliability Of A Stereoscopic Test For Field Dominance, David M. Pierce
Proceedings of the Iowa Academy of Science
Results support findings by Bechtoldt and Colliver for temporal dominance of the visual field. The test-retest reliability of the stereoscopic procedure for assessing dominance of the nasal or temporal visual fields was found to be significant for both left and right temporal fields. Furthermore, the test results appear to be unaffected by age or by level of intellectual functioning. Further research is in order both to evaluate competing theories of binocular rivalry and suppression and to assess optical processes at cortical and subcortical levels.
X-Ray Diffraction Analysis Of The Pennsylvanian Clays Of Mahaska County, Harold Dean Anderson
X-Ray Diffraction Analysis Of The Pennsylvanian Clays Of Mahaska County, Harold Dean Anderson
Proceedings of the Iowa Academy of Science
This study involved five of the operating open-pit mines of Mahaska County, Iowa, which are located near the eastern edge of the Mid-Continent Basin. The mines were sampled from the underclay to the surface at two foot intervals and the clay fraction was separated and analyzed both qualitatively and quantitatively. Results of this investigation showed that the major component present besides illite and kaolinite in the hulk sample was quartz. However, the quartz was not present in the less-than-two micron fraction. The clay fraction analysis varied from 38 percent to 60 percent kaolin and 17 percent to 26 percent illite …
Engineering Solutions To Environmental Problems, Richard B. Miller
Engineering Solutions To Environmental Problems, Richard B. Miller
Proceedings of the Iowa Academy of Science
The environmental problems that we face today are largely associated with what we call the "good life." The "good life" consists of lots of leisure time, low cost of goods, lots of modem conveniences, etc. This means the convenience of prepackaged foods, throw-away containers, and all kinds of disposables. The free time gives us lots of time to travel, recreation, etc. We're able to afford it because we have mass production made possible primarily by electrical energy. We like to travel so we need lots of transportation: automobiles, airplanes, etc. Our income has gone up faster than our costs, and …
Back Cover - Iowa Academy Of Science Board Of Directors And Section Chairmen
Back Cover - Iowa Academy Of Science Board Of Directors And Section Chairmen
Proceedings of the Iowa Academy of Science
No abstract provided.
Faunal Analysis Of The Schmitt Site, Ralph E. Eshelman
Faunal Analysis Of The Schmitt Site, Ralph E. Eshelman
Proceedings of the Iowa Academy of Science
A faunal analysis on the animal remains recovered from the Schmitt Site shelter was conducted to supplement the formal archeological report by John L. Reese (Proc. Iowa Acad. Sci., 79 (2): 56-58, 1972. Animal remains suggest that the valley in which the site was situated had permanent water, an oak-hickory forest interspersed with meadows, and prairies above the valley on the flatlands. Little if any climatic change has taken place since the occupation of the site. The shelter probably was never occupied permanently, but was used periodically as a camp.
Parametric Relationships Of Conventional Versus Repetitive Loading Triaxial Tests, Darwin E. Fox, J. M. Hoover
Parametric Relationships Of Conventional Versus Repetitive Loading Triaxial Tests, Darwin E. Fox, J. M. Hoover
Proceedings of the Iowa Academy of Science
This investigation was developed to examine response of a field-mixed asphalt-treated granular base material to 100,000 repetitions of a load whose magnitude was determined by a failure criterion proposed by Hoover (1970), and Fish and Hoover (1969). Axial strain and load at the point of maximum volume of a specimen during a conventional triaxial test appear to produce a "proportional limit," indicating that failure may have started. Axial stress at this point was applied in the repetitive loading triaxial test at the same confining pressure, during which axial strain and pore pressure continuously increased and specimen volume decreased in each …
A Primary Mammoth Site With Associated Fauna In Pottawattamie County, Iowa, Leo Carson Davis, Ralph E. Eshelman, Jean C. Prior
A Primary Mammoth Site With Associated Fauna In Pottawattamie County, Iowa, Leo Carson Davis, Ralph E. Eshelman, Jean C. Prior
Proceedings of the Iowa Academy of Science
. In August 1970, an investigation was made of the remains of a mammoth, Mammuthus cf. M. columbi, exposed west of Oakland, in Pottawattamie County, Iowa. A segment of proboscidian tusk, a lower third molar, and additional skeletal fragments were collected from the Wisconsin loess. Associated with the mammoth was a small-mammal fauna consisting of Phenacomys intermedius (heather vole), Microtus pennsylvanicus (meadow vole), and Vulpes vulpes (red fox), extant species with an area of sympatry immediately north of the Minnesota-Canadian border. This fauna, here designated the Oakland local fauna, supports cooler summers in western Iowa during Wisconsin loess deposition.
The Nature Of The Ascus Wall: A Preliminary Study, Carl Malone
The Nature Of The Ascus Wall: A Preliminary Study, Carl Malone
Proceedings of the Iowa Academy of Science
The ultrastructure of the ascus wall of five free-living and two lichenized Ascomycetes is briefly described. The unitunicate ascus is interpreted to be two layered, and the bitunicate ascus is interpreted to be four layered. It is suggested that the terms "single layered" and "two layered" not be used synonymously with the terms "unitunicate" and "bitunicate" respectively.
A Preliminary Study Of Aquatic Hyphomycetes In Iowa, Barbara J. Dyko, Lois H. Tiffany
A Preliminary Study Of Aquatic Hyphomycetes In Iowa, Barbara J. Dyko, Lois H. Tiffany
Proceedings of the Iowa Academy of Science
Ten species in seven genera of aquatic Hyphomycetes have been found on submerged leaves from six aquatic sites in Story County, Iowa.
Winter Movement And Home Range Of White-Tailed Deer At Pilot Knob State Park, Iowa, Michael D. Zagata, Arnold O. Haugen
Winter Movement And Home Range Of White-Tailed Deer At Pilot Knob State Park, Iowa, Michael D. Zagata, Arnold O. Haugen
Proceedings of the Iowa Academy of Science
Home ranges of nine radio-equipped white-tailed deer (Odocoileus virginianus) were determined during the winters of 1969-70 through 1971-72. For does and female fawns, the winter ranges varied from 145 to 307 acres, the major (longest) axes from 1.00 to 1.19 miles, and minimum daily movement from 0.78 to 1.00 mile. Home range sizes of adult does were more consistent than those of female fawns or bucks, varying from 198 to 215 acres. Their major (longest) axes ranged from 1.00 to 1.12 miles and minimum daily movement varied from 0.78 to 0.88 mile. Bucks exhibited the greatest variation in movement, …
In Memoriam: Henry S. Conard, 1874-1971
In Memoriam: Henry S. Conard, 1874-1971
Proceedings of the Iowa Academy of Science
Henry Shoemaker Conard, Honorary Fellow of the Iowa Academy of Science, its President in 1914-15, and Grinnell College Professor Emeritus of Botany, Died at Lake Hamilton, Florida, on October 7, 1971. Professor Conard was born in Philadelphia, Pennsylvania, on September 12, 1874. He completed work for the Bachelor of Science and Master of Arts degrees in 1894 and 1895, respectively, at Haverford College. Following a two-year tenure as Harrison Fellow at the University of Pennsylvania, Professor Conard was granted the Doctor of Philosophy degree in 1901.
Back Cover - Iowa Academy Of Science Board Of Directors And Section Chairmen
Back Cover - Iowa Academy Of Science Board Of Directors And Section Chairmen
Proceedings of the Iowa Academy of Science
No abstract provided.
Cover - Table Of Contents
Proceedings of the Iowa Academy of Science
No abstract provided.
Waterfowl Lead Poisoning Studies At Forney's Lake, Iowa, Richard A. Bishop
Waterfowl Lead Poisoning Studies At Forney's Lake, Iowa, Richard A. Bishop
Proceedings of the Iowa Academy of Science
Forney's Lake in Fremont County is a popular waterfowl concentration area along the Missouri River with a history of lead poisoning of mallards. About 1,500 mallards died from lead poisoning in 1960 and about 2,500 in the winter of 1965 and 1966. A total of 143 bottom samples taken in 1966 and 1967 indicated an average of 1.6 pellets per square foot were available to waterfowl. Lead poisoning losses on this area can be minimized by regulating water levels after the hunting season to move the birds elsewhere.
The Effects Of 2-Deoxyglucose On The Atp Consumption In Cell Cultures, Darrell D. Young
The Effects Of 2-Deoxyglucose On The Atp Consumption In Cell Cultures, Darrell D. Young
Proceedings of the Iowa Academy of Science
Cultures of Chinese Hamster Cells (CCL 16, Don Strain) were treated with 2-Deoxyglucose over varying lengths of time in order to compare the mitotic index with the rate of adenosine triphosphate synthesis. Treatment with the glucose analog reduces both the mitotic index and the ATP level by nearly 50 percent. The relationship to the Swann "energy reservoir" hypothesis is also discussed.
Iowaville: A Possible Historic Ioway Site On The Lower Des Moines River, Dean F. Straffin
Iowaville: A Possible Historic Ioway Site On The Lower Des Moines River, Dean F. Straffin
Proceedings of the Iowa Academy of Science
In Iowa, the Ioway and Oto Indians bridge the gap between the historically known Indians inhabiting Iowa, and the long cultural continuum delineated by archaeological research on prehistoric sites. Few historic Ioway sites are known today, particularly in southeast Iowa. The recently discovered Iowaville site may contribute substantially to our knowledge of scantily documented Ioway Indians, and may shed light on relationships with the prehistoric Oneota culture.
Space Travel To The Moon And Kepler's Dream, Paul B. Selz
Space Travel To The Moon And Kepler's Dream, Paul B. Selz
Proceedings of the Iowa Academy of Science
Johann Kepler advocated Copernicus's heliocentric theory in his Dream and Notes. He imagined how a moon dweller would see the solar system and the conclusions he would draw. Then by reversing the point of view to the earth, Kepler showed that the same conclusions would follow. This involved concepts of mass, inertia, gravity, acceleration, velocity, and the driving force in a trip to the moon. Twelve years before Newton's birth in 1642, Kepler published in this little known dream ideas which Newton later developed. Kepler's ideas concerning the moon's distance, motion, and conditions to be met in space are reviewed.
Cover - Table Of Contents
Proceedings of the Iowa Academy of Science
No abstract provided.
Effects Of Ddt On The Density And Diversity Of Tardigrades, Gary W. Barrett, Ronald G. Kimmel
Effects Of Ddt On The Density And Diversity Of Tardigrades, Gary W. Barrett, Ronald G. Kimmel
Proceedings of the Iowa Academy of Science
Twenty lichen-bearing tree bark samples were collected from DDT sprayed American elm trees (Ulmus Americana L.) in central Iowa. Twenty comparable samples were collected from an adjacent nontreated habitat. A tardigrade density of 4 individuals collected from the treated habitat was found to differ significantly (P < .01) from a density of 97 individuals collected from the non-treated area. Margalef's diversity index (D=S-1/1n N) determinations were found to be 0.00 and 0.44 for the treated and non-treated habitats, respectively. Tardigrade species organization within the nontreated habitat did not differ significantly from that as predicted by MacArthur's broken-stick model, suggesting that tardigrade species occupy contiguous, non-overlapping niches within a …
Petrified Lepidophloios Specimens From Iowa Coal Balls, Nancy Brotzman, Jeffry Schabilion
Petrified Lepidophloios Specimens From Iowa Coal Balls, Nancy Brotzman, Jeffry Schabilion
Proceedings of the Iowa Academy of Science
Examination of Iowa coal balls from the Des Moines Series has yielded two petrified stern fragments assignable to the arborescent lycopod genus Lepidophloios. Details of the leaf cushions and internal stem anatomy are described and compared with similar specimens from Kansas and Illinois coal balls. In light of these observations, criteria presently used to distinguish among species of Lepidophloios are re-examined. In particular, the diagnostic features of Lepidophloios kansanus (Felix) Eggert and L. pachydermatikos Andrews & Murdy are reviewed and determine to represent ontogenetic differences. The probable conspecific nature of the above taxa results in assignment of the Iowa specimens …
A Further Note On Formica Exsectiodes Forel, K. M. Quick, C. L. Christensen
A Further Note On Formica Exsectiodes Forel, K. M. Quick, C. L. Christensen
Proceedings of the Iowa Academy of Science
Consideration of the subsoil form and its effect on ant mound distribution within the forest is presented. Active ant mounds are found only where the subsoil is mainly composed of sand and gravel. A report on the discovery of another large complex of ant mounds six miles northwest of New Hartford, Iowa is made.
Primary Productivity In Lake Red Haw, Lucas County, Iowa, Phyllis J. Kingsbury, Lynda D. Corkum, Paul D. Krause
Primary Productivity In Lake Red Haw, Lucas County, Iowa, Phyllis J. Kingsbury, Lynda D. Corkum, Paul D. Krause
Proceedings of the Iowa Academy of Science
Primary production studies were conducted on an 83-acre lake in south central Iowa during the summer of 1970 and winter of 1971. Primary productivity was measured using the light dark bottle method. Summer values ranged from 2.74 to 6.25 grams of carbon assimilated/m2/day. This was correlated with water temperature, nitrate nitrogen, ortho phosphates, carbon dioxide, light penetration and plankton populations. Studies were continued during the winter using C14 and scintillation counting methods.
Some Diatoms In Lacustrine Sediments Of Pillsbury And Sylvan Lake Beds In Northwest Iowa, James J. Hungerford
Some Diatoms In Lacustrine Sediments Of Pillsbury And Sylvan Lake Beds In Northwest Iowa, James J. Hungerford
Proceedings of the Iowa Academy of Science
Diatom populations in two cores of lake sediments from Northwest Iowa have been analyzed as part of an investigation into the history of postglacial sediments in this region. The three member strata sequence of sediments indicate lacustrine diatoms were deposited in the upper two members. Diatoms and macroscopic organisms are scarce to non-existent in the deepest member. Evidence indicates that the level where diatom populations were first established represents the original bottom of the lake. Pollens, particularly spruce pollen, found immediately below the upper two members were possibly blown in and mixed with sediments from the receding glacier.
The Effects Of Non-Solution Hypotheses On Concept Learning, Marianne Mcmanus
The Effects Of Non-Solution Hypotheses On Concept Learning, Marianne Mcmanus
Proceedings of the Iowa Academy of Science
Forty-five preschool children were given 18 uncorrected trials before solving a size discrimination problem. Non-solution response choices for a particular stimulus size or position were evidenced by 71% of the subjects. Subjects who made non-solution hypothesis behaviors .on the trials before concept learning did not require significantly more blocks of trials to learn the discrimination problem than those subjects who had responded randomly. A trend was noted such that subjects who had demonstrated the most consistency in their non-solution hypothesis behavior required fewer trials to learn the discrimination problem.