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Fungal Colonization Of Alfalfa Stubble Following Harvest, J. K. O'Mara, G. P. Munkvold

Journal of the Iowa Academy of Science: JIAS

Two-year-old stands of alfalfa cultivars Saranac and Vernal, planted in Central Iowa, were sampled 0, 15, and 30 days after the first harvest in 1995 to identify fungi colonizing the stubble left after harvest and evaluate the role of harvest-induced wounds as infection sites for potential crown-rotting fungi. Analysis of variance was conducted to determine if sampling date and cultivar significantly affected incidence of the fungi. All stems were infected with at least one fungal species at every sampling dare. The fungal genera most frequently isolated were Alternaria, Colletotrichum, Fusarium, Phoma, and Rhizoctonia. Fusarium acuminatum was the most frequently isolated …

Carnivorous Spadefoot (Spea Bombifrons Cope) Tadpoles And Fairy Shrimp In Western Iowa, Eugenia S. Farrar, Jane D. Hey

Journal of the Iowa Academy of Science: JIAS

Amphibian larval polymorphisms, rarely found in the Midwest, are more common in arid western regions. We have discovered that Plains spadefoot toad, Spea bombifrons Cope, tadpoles occur as carnivorous and omnivorous morphological forms in flooded soybean and corn fields on the Missouri River flood plain of western Iowa. Carnivores have longer snouts, larger beaks with an upper cusp and lower notch, shorter intestines with fewer loops than the omnivores, and they feed on fairy shrimp. A similar polymorphism in Spea multiplicata Cope enhances survival in the desert because the carnivore develops faster after consuming fairy shrimp and is able to …

A Search For Average, Extremes, And Runs Of Unusual Weather In Iowa, R. E. Carlson, D. P. Todey

Journal of the Iowa Academy of Science: JIAS

Temperature and precipitation during the past decade have exhibited wide variation throughout Iowa. Is this unusual? An attempt was made to answer this question by computing various statistical parameters that characterize variation in Iowa's long term climatic record. Absolute deviations were used to identify the most and least variable months and years since 1900. Overall, 1936 with a very cold winter and very warm summer was the least normal year. Runs of daily weather showed that heat and cold stress could often persist for more than 1 month. Runs of dry days were much longer than runs of wet days. …

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Photo, Dr. Richard W. Pohl, February 1982 & Foreward To V.104 No.3, Lynn G. Clark

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Nesting Status Of The Cooper's Hawk In Iowa: 1988-1996, David. J. Conrads

Journal of the Iowa Academy of Science: JIAS

The Cooper's Hawk was once considered a common nesting species in Iowa. Organochlorine pesticides and their residues, along with habitat loss contributed to its decline throughout the Midwest after the 1940's. This species was classified as endangered in Iowa in 1984, but recent trends in nests found indicate that the population of these hawks has increased. Since April 1988, 53 nests have been discovered in Iowa. Due to the apparent population growth, this species was removed from Iowa's endangered species list in 1994.

Awards And Recognition, Iowa Academy Of Science, 1997

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Teaching Fractions Through The Multiple Intelligences, Lisa K. Freese

Graduate Research Papers

Fractions are frequently used in daily life. However, many students have difficulty learning fraction concepts. In addition, some students begin the study of fractions with negative impressions.

The writer of this article uses Howard Gardner's theory of multiple intelligences to address the difficulties students face in learning fraction concepts. Dr. Howard Gardner, the creator of the Theory of Multiple Intelligences (Ml Theory), believes that it is unfair to teach all students in the same way. Students need opportunities to solve relevant problems that are meaningful to their everyday lives. Rather than concentrating on singular viewpoints and exclusive answers when studying …

Iowa Academy Of Science 109th Annual Meeting [1997]: Advance Program, Iowa Academy Of Science

Iowa Academy of Science Documents

Contains information about the schedule and presentations for the 1997 annual meeting of the Iowa Academy of Science.

Incorporating The Ti-92 Into A High School Classroom, Heather Golliher

Presidential Scholars Theses (1990 – 2006)

Calculators have been a part of mathematics for years. More recently, the graphing calculator has been widely accepted as a mathematical tool. The Tl-92 has the capability to take this technology integration a step further. It has been described as having "the power of a computer with the independence of a graphing calculator." With the geometry package and the symbolic manipulation unique to the Tl-92, the question becomes, how should this technology be coordinated with the existing curricula in high school classrooms to make the learning and teaching of mathematics as exciting and relevant as possible?

Iowa Academy Of Science Membership Directory, 1997-98, Iowa Academy Of Science

Iowa Academy of Science Documents

Table of Contents:

Editorial Board, Journal ... 5
Committees ... 6
Sections ... 18
ISTS Regional Directors ... 22
Awards of Merit ... 24
Excellence in Science Teaching Awards ... 25
Past Presidents ... 26
Membership Roster ... 27

An Analysis Of Student Reaction To The Use Of Interactive Video And Hypermedia To Enhance Post-Secondary Biological Science Education, Paulette A. Church

Graduate Research Papers

The perceived effect on student learning provided by interactive technology in the biological sciences has been studied on a small, private, two-year college campus. The first portion of the study was the perceived effectiveness of interactive video when used for class presentations for biological science majors. The second portion of the study evaluated five campus-produced interactive laserdisc tutorials designed for individual and group use for students taking a general introductory biology lab course.

Math Problem Solving In The Classroom, Mary Jane Conrad

Graduate Research Papers

This paper describes the important aspects for teaching problem solving in mathematics. Problem solving was used to introduce the concepts as well as to practice them. This research paper discusses mathematical concepts and skills in a student-centered environment of a multi-aged first and second grade classroom in a parochial school and investigates the effects of the approach on students, teacher, and curriculum.

In many primary classrooms mathematics is taught in ways that fail to connect with young children's prior knowledge and ways of learning. The cumulative effect is such that students tend to do math procedures, rather than apply math …

Book Review - Okoboji Wetlands. A Lesson In Natural History, Robert W. Black

Journal of the Iowa Academy of Science: JIAS

Michael Lannoo's reverent, musing history of the Okoboji region, and especially its wetlands and the Iowa Lakeside Laboratory, is a uniquely structured, well-written and wonderfully illustrated introduction to a distinct region in Iowa, a rich natural history of wetland organisms and a relatively unexplored branch of environmental ethics. Lannoo draws upon many years of experience in this region, as a student, researcher and teacher, and the wonderful resources of the Iowa Lakeside Laboratory and the Iowa Great Lakes Maritime Museum to produce a volume that educates the reader of the history and natural history of the Okoboji region and provokes …