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Iowa State University

2007

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Farmstead, Chelsea Reynolds Dec 2007

Farmstead, Chelsea Reynolds

Sketch

No abstract provided.


Technical Appendix To 'Temporary Stabilizations, Sudden Stops, And Asset Prices', Rajesh Singh, Chetan Subramanian Dec 2007

Technical Appendix To 'Temporary Stabilizations, Sudden Stops, And Asset Prices', Rajesh Singh, Chetan Subramanian

Economics Working Papers (2002–2016)

This is a technical appendix to our publication 'Temporary stabilizations, sudden stops, and asset prices' in the Review of Development Economics, Vol. 13 no. 2 (May 2009): 333-347.


Cases, Regulations, And Statutes, Robert P. Achenbach Jr Dec 2007

Cases, Regulations, And Statutes, Robert P. Achenbach Jr

Agricultural Law Digest

No abstract provided.


Work Opportunity Tax Credit Extended To Employees Residing In "Rural Renewal Counties", Neil E. Harl Dec 2007

Work Opportunity Tax Credit Extended To Employees Residing In "Rural Renewal Counties", Neil E. Harl

Agricultural Law Digest

The Small Business and Work Opportunity Tax Act of 20071, in addition to other changes in the Work Opportunity Tax Credit,2 the 2007 tax act extended the credit to newly-hired employees residing in a “rural renewal county.”3 The credit amount is up to a maximum of 40 percent of the first $6,000 of “qualified first-year wages” paid to an eligible employee who is a “designated community resident” and who works for at least 400 hours during the first year of employment.4 Thus, the credit could be as much as $2400 for each eligible employee.5


Index To Volume 18, Nos. 1-24, Agricultural Law Digest Dec 2007

Index To Volume 18, Nos. 1-24, Agricultural Law Digest

Agricultural Law Digest

No abstract provided.


Continuing Education For Iowa Commercial Pesticide Applicators, Jean Mcguire Dec 2007

Continuing Education For Iowa Commercial Pesticide Applicators, Jean Mcguire

Integrated Crop Management News

Four continuing instructional courses (CIC) will be held in February and March to offer continuing education credit for Iowa commercial pesticide applicators. These programs will be held around the state at Iowa State University Extension county offices.


Evaluation Of Corn Rootworm Hybrids, Marlin E. Rice, James D. Oleson, Jon J. Tollefson Dec 2007

Evaluation Of Corn Rootworm Hybrids, Marlin E. Rice, James D. Oleson, Jon J. Tollefson

Integrated Crop Management News

This past summer, we evaluated corn rootworm technologies in side-by-side experiments at four locations in Iowa (Ames, Crawfordsville, Nashua, and Sutherland). The objective was to measure the degree of root protection and standability provided by the corn rootworm Cry proteins in each of three technologies, and then to compare them to a standard soil insecticide--Aztec® 2.1G. These field trials measured performance in protecting corn roots under a wide range of environmental conditions. Performance was measured as root injury, product consistency, and plant lodging. All tests were planted on continuous corn ground that was planted late the previous year to ...


Field Testing Of N-Hibit™ Seed Treatment In 2007 For Management Of Scn In Iowa, Gregory L. Tylka, Christopher C. Marett Dec 2007

Field Testing Of N-Hibit™ Seed Treatment In 2007 For Management Of Scn In Iowa, Gregory L. Tylka, Christopher C. Marett

Integrated Crop Management News

N-Hibit™ is a seed-treatment that contains harpin protein, a compound that can stimulate plant defense responses. N-Hibit™ is now being sold in the United States for management of the soybean cyst nematode (SCN). Iowa State University evaluated the effects of N-Hibit™ seed treatment on soybean yield and SCN population densities in experiments at nine locations throughout Iowa. Experiments were conducted in Albert City, Mason City, and Manchester in northern Iowa; Cambridge, Farnhamville, and Urbana in central Iowa; and Council Bluffs, Crawfordsville, and Melrose in southern Iowa. The work was supported by the soybean checkoff through funds from the Iowa Soybean ...


Rice Steps Down As Executive Editor, Marlin E. Rice Dec 2007

Rice Steps Down As Executive Editor, Marlin E. Rice

Integrated Crop Management News

During the past 19 years, I have served as the executive editor of this newsletter, and at the end of this year, I will step down from that responsibility. When I first assumed this role in 1988, the newsletter was known as Crops, Soils and Pests Newsletter, and it was printed on yellow paper with no photographs. During that year, there were 1,464 paid subscribers.


Fungicides For Soybean: Considerations For 2008, Daren S. Mueller Dec 2007

Fungicides For Soybean: Considerations For 2008, Daren S. Mueller

Integrated Crop Management News

Even though soybean rust was found in Iowa in 2007, the pathogen cannot survive in Iowa. The pathogen can only survive on living plant tissue of susceptible plants. Likely overwintering sites are in Florida and Texas on kudzu and in Central America on legumes, such as jicama and soybean. This means the risk of rust getting to Iowa in 2008 is the same as it was at the beginning of past years. For rust to get to Iowa, it will need to successfully overwinter somewhere in the South and retrace the path it traveled in 2007.


Yield Responsiveness Of Corn To Foliar Fungicide Application In Iowa, Alison E. Robertson, Lori Abendroth, Roger W. Elmore Dec 2007

Yield Responsiveness Of Corn To Foliar Fungicide Application In Iowa, Alison E. Robertson, Lori Abendroth, Roger W. Elmore

Integrated Crop Management News

An estimated three million acres of corn in Iowa were sprayed mid-season with fungicides (strobilurin or a strobilurin/triazole combination) in 2007. Reasons for spraying vary and include the high price of corn, potential to control diseases, and a possibility of improved yield from "plant health" benefits. Until this year, fungicide applications to production corn fields were rarely practiced in Iowa because they were not profitable. In addition, many of the hybrids grown today have good overall tolerance to foliar diseases.


New Distribution Format For Icm Newsletter, Wendy Wintersteen, Gerald A. Miller Dec 2007

New Distribution Format For Icm Newsletter, Wendy Wintersteen, Gerald A. Miller

Integrated Crop Management News

The print version of the Integrated Crop Management (ICM) Newsletter will be discontinued at the close of the 2007 calendar year. A new distribution format of the ICM Newsletter is planned for 2008. Discontinuation of the printed version was a difficult decision. However, in recent years, we have experienced a steady decrease in the number of subscribers for the print version and a steady increase in printing, design, handling and shipping costs. During the newsletter’s 19-year run, ISU was the first land-grant university to publish a full color crops newsletter and deliver it to subscribers that same week. This ...


Iowa Seed Directory Offers Quality Seed Options, Jessica L. Vogel Dec 2007

Iowa Seed Directory Offers Quality Seed Options, Jessica L. Vogel

Integrated Crop Management News

Farmers and gardeners looking for quality-assured seed to plant can order a free 2007 Iowa Seed Directory from the Iowa Crop Improvement Association (ICIA). Seed production information from more than 100 producers is included in this year's directory. Iowa Seed Directory listings include ICIA members who range from farmer-owned enterprises to multi-national seed companies. The directory lists fields that were inspected for genetic identity and purity during the 2007 season. The Iowa Seed Directory is published annually as a resource for quality soybean, oat, wheat, and native prairie species seeds.


Surveying Iowa For Scn, Gregory L. Tylka, Alison E. Robertson Dec 2007

Surveying Iowa For Scn, Gregory L. Tylka, Alison E. Robertson

Integrated Crop Management News

Most crop professionals in the Midwest recognize the soybean cyst nematode (SCN) as a widespread, yield-limiting factor. But until the mid-1990s, little was known about the actual distribution of SCN throughout the region. In 1995 and 1996, Iowa State University plant pathologists collaborated with the USDA National Agricultural Statistics Service (NASS) personnel to collect samples from hundreds of randomly selected fields in Minnesota, Iowa, Missouri, Illinois, Indiana, and Ohio. The work was supported by the soybean checkoff through funds from the North Central Soybean Research Program.


Soybean Rust: A Year In Review, Daren S. Mueller Dec 2007

Soybean Rust: A Year In Review, Daren S. Mueller

Integrated Crop Management News

During the 2005 and 2006 growing seasons, soybean rust was not a threat for Iowa soybean growers. This year was a different story, as soybean rust was established fairly early in the season in Texas and Louisiana creating the potential for soybean rust to get to Iowa during the growing season. Thankfully, soybean rust was not found while soybean plants were in a vulnerable stage; however, soybean rust was found in a field in Dallas County, Iowa, on Tuesday, September 25, 2007. Since the initial find, soybean rust was confirmed in 13 additional counties in Iowa (Figure 1).


Fate And Transport Of Pathogen Indicators From Pasturelands, Michelle L. Soupir Dec 2007

Fate And Transport Of Pathogen Indicators From Pasturelands, Michelle L. Soupir

Michelle L. Soupir

The U.S. EPA has identified pathogen indicators as a leading cause of impairments in rivers and streams in the U.S. Elevated levels of bacteria in streams draining the agricultural watersheds cause concern because they indicate the potential presence of pathogenic organisms. Limited understanding of how bacteria survive in the environment and are released from fecal matter and transported along overland flow pathways results in high uncertainty in the design and selection of appropriate best management practices (BMPs) and in the bacterial fate and transport models used to identify sources of pathogens.

The overall goal of this study was ...


S,C-Sulfonium Ylides From Thiophenes:  Potential Carbene Precursors, Stacey A. Stoffregen, Melanie Heying, William S. Jenks Dec 2007

S,C-Sulfonium Ylides From Thiophenes:  Potential Carbene Precursors, Stacey A. Stoffregen, Melanie Heying, William S. Jenks

Chemistry Publications

Photolysis of S,C-sulfonium ylides derived from thioanisol, thiophene, benzothiophene, or dibenzothiophene provides products deriving from dicarbomethoxycarbene. In methanol, no rearrangement of the carbene to the ketene derivative is observed. Formation of dibenzothiophene and benzothiophene is quantitative. For the thiophene-based ylide, insertion of the carbene into the α-CH bond of thiophene is observed. Evidence is presented that supports formation of both singlet and triplet carbene.


A Possible Constraint On Regional Precipitation Intensity Changes Under Global Warming, W. J. Gutowski Jr., E. S. Takle, K. A. Kozak, J. C. Patton, R. W. Arritt, J. H. Christensen Dec 2007

A Possible Constraint On Regional Precipitation Intensity Changes Under Global Warming, W. J. Gutowski Jr., E. S. Takle, K. A. Kozak, J. C. Patton, R. W. Arritt, J. H. Christensen

Geological and Atmospheric Sciences Publications

Changes in daily precipitation versus intensity under a global warming scenario in two regional climate simulations of the United States show a well-recognized feature of more intense precipitation. More important, by resolving the precipitation intensity spectrum, the changes show a relatively simple pattern for nearly all regions and seasons examined whereby nearly all high-intensity daily precipitation contributes a larger fraction of the total precipitation, and nearly all low-intensity precipitation contributes a reduced fraction. The percentile separating relative decrease from relative increase occurs around the 70th percentile of cumulative precipitation, irrespective of the governing precipitation processes or which model produced the ...


Toward Sequencing Cotton (Gossypium) Genomes, Z. Jeffrey Chen, Brian Eric Scheffler, Elizabeth Dennis, Barbara A. Triplett, Tianzhen Zhang, Wangzhen Guo, Xiaoya Chen, David M. Stelly, Pablo D. Rabinowicz, Christopher D. Town, Tony Arioli, Curt Brubaker, Roy G. Cantrell, Jean-Marc Lacape, Mauricio Ulloa, Peng Chee, Candace Haigler, Richard G. Percy, Alan R. Gingle, Sukumar Saha, Thea Wilkins, Robert J. Wright, Allen Van Deynze, Yuxian Zhu, Shuxun Yu, Ibrokhim Abdurakhmonov, P. Ananda Kumar, Mehboob-Ur- Rahman, Yusuf Zafar, John Z. Yu, Russell J. Ohel, Jonathan F. Wendel, Andrew H. Paterson Dec 2007

Toward Sequencing Cotton (Gossypium) Genomes, Z. Jeffrey Chen, Brian Eric Scheffler, Elizabeth Dennis, Barbara A. Triplett, Tianzhen Zhang, Wangzhen Guo, Xiaoya Chen, David M. Stelly, Pablo D. Rabinowicz, Christopher D. Town, Tony Arioli, Curt Brubaker, Roy G. Cantrell, Jean-Marc Lacape, Mauricio Ulloa, Peng Chee, Candace Haigler, Richard G. Percy, Alan R. Gingle, Sukumar Saha, Thea Wilkins, Robert J. Wright, Allen Van Deynze, Yuxian Zhu, Shuxun Yu, Ibrokhim Abdurakhmonov, P. Ananda Kumar, Mehboob-Ur- Rahman, Yusuf Zafar, John Z. Yu, Russell J. Ohel, Jonathan F. Wendel, Andrew H. Paterson

Ecology, Evolution and Organismal Biology Publications

Despite rapidly decreasing costs and innovative technologies, sequencing of angiosperm genomes is not yet undertaken lightly. Generating larger amounts of sequence data more quickly does not address the difficulties of sequencing and assembling complex genomes de novo. The cotton (Gossypium spp.) genomes represent a challenging case. To this end, a coalition of cotton genome scientists has developed a strategy for sequencing the cotton genomes, which will vastly expand opportunities for cotton research and improvement worldwide.


Dominant Species Constrain Effects Of Species Diversity On Temporal Variability In Biomass Production Of Tallgrass Prairie, H. Wayne Polley, Brian J. Wilsey, Justin D. Derner Dec 2007

Dominant Species Constrain Effects Of Species Diversity On Temporal Variability In Biomass Production Of Tallgrass Prairie, H. Wayne Polley, Brian J. Wilsey, Justin D. Derner

Ecology, Evolution and Organismal Biology Publications

Species diversity is thought to stabilize functioning of plant communities. An alternative view is that stability depends more on dynamics of dominant species than on diversity. We compared inter-annual variability (inverse of stability) of aboveground biomass in paired restored and remnant tallgrass prairies at two locations in central Texas, USA. Data from these two locations were used to test the hypothesis that greater richness and evenness in remnant than restored prairies would reduce variability in aboveground biomass in response to natural variation in rainfall. Restored prairies were chosen to be similar to paired remnant prairies in characteristics other than species ...


Research To Action: A Campus-Community Partnership To Address Health Issues Of The Food Insecure, Kimberly A. Greder, Steven Garasky, Susan Klein Dec 2007

Research To Action: A Campus-Community Partnership To Address Health Issues Of The Food Insecure, Kimberly A. Greder, Steven Garasky, Susan Klein

Human Development and Family Studies Publications

A university-community partnership assessed the food security and health status of food pantry participants in a midwestern urban community. Eighty percent of households surveyed were food insecure, and 40% experienced fair or poor health. The sample experienced higher rates of chronic disease than the general population. A nutrition education program designed to meet specific nutrition and health-related needs of pantry participants was developed. Implications include training pantry staff about chronic disease and its relationship to nutrition, identifying pantry foods that provide positive health benefits, and developing consumer publications focused on selecting and preparing pantry foods when one has chronic disease.


Research To Action: A Campus-Community Partnership To Address Health Issues Of The Food Insecure, Kimberly A. Greder, Steven Garasky, Susan Klein Dec 2007

Research To Action: A Campus-Community Partnership To Address Health Issues Of The Food Insecure, Kimberly A. Greder, Steven Garasky, Susan Klein

Human Development and Family Studies Publications

A university-community partnership assessed the food security and health status of food pantry participants in a midwestern urban community. Eighty percent of households surveyed were food insecure, and 40% experienced fair or poor health. The sample experienced higher rates of chronic disease than the general population. A nutrition education program designed to meet specific nutrition and health-related needs of pantry participants was developed. Implications include training pantry staff about chronic disease and its relationship to nutrition, identifying pantry foods that provide positive health benefits, and developing consumer publications focused on selecting and preparing pantry foods when one has chronic disease.


Advanced Approaches To Characterizing Nonlinear Pavement System Responses, Halil Ceylan, Kasthurirangan Gopalakrishnan, Alper Guclu Dec 2007

Advanced Approaches To Characterizing Nonlinear Pavement System Responses, Halil Ceylan, Kasthurirangan Gopalakrishnan, Alper Guclu

Civil, Construction and Environmental Engineering Publications

The use of falling weight deflectometer—based backcalculation techniques to determine pavement layer moduli is a cost-effective and widely used method for the structural evaluation of an existing pavement. The nonlinear stress-sensitive response of pavement geomaterials has been well established, and mechanistic-based pavement design can be improved by inclusion of these nonlinear material properties. To further the science of nonlinear backcalculation, the TRB Strength and Deformation Characteristics of Pavement Sections Committee has assembled four data sets that can be used to demonstrate the ability to derive stress-dependent moduli for pavement layers. In this study, validated artificial neural network (ANN)—based ...


Reporting Program Impacts: Slaying The Dragon Of Resistance, Nancy K. Franz, Mark Mccann Dec 2007

Reporting Program Impacts: Slaying The Dragon Of Resistance, Nancy K. Franz, Mark Mccann

Nancy K. Franz

Virginia Cooperative Extension has responded to today's environment of enhanced accountability by improving the organization's program impact reporting. Successful strategies to enhance the quantity and quality of program impact reports include new hires, training faculty and administration, individual and small group technical assistance, development of reporting tools, and tying impact reporting to performance and recognition. This holistic approach resulted in enhanced reporting and use of program impacts as well as improved program design and evaluation.


Design Piracy: Student Perceptions Of A Constructive Controversy Activity, Sara B. Marcketti Dec 2007

Design Piracy: Student Perceptions Of A Constructive Controversy Activity, Sara B. Marcketti

Apparel, Events and Hospitality Management Publications

Optimal learning occurs when students are interested in the subject matter, are motivated with challenging and quality learning opportunities, and when immersed in atmospheres that make learning enjoyable. One technique to promote optimal learning is through the use of constructive controversies. The purpose of this study was to provide an example of a constructive controversy and to explore student perceptions regarding the learning format. The respondents (n=126 undergraduates) engaged in the constructive controversy assignment and completed a questionnaire to assess variables including new thinking, enjoyment, and demographic information. Regression analysis indicated that new thinking as a result of participation ...


The Arctic Freshwater System: Changes And Impacts, Daniel White, Larry D. Hinzman, Lilian Alessa, John J. Cassano, Molly Chambers, Kelly Falkner, Jennifer Francis, William J. Gutowski Jr., Marika Holland, R. Max Holmes, Henry Huntington, Douglas Kane, Andrew Kliskey, Craig Lee, Bruce Peterson, T. Scott Rupp, Fiamma Straneo, Michael A. Steele, Rebecca Woodgate, Daqing Yang, Kenji Yoshikawa, Tinjung Zhang Dec 2007

The Arctic Freshwater System: Changes And Impacts, Daniel White, Larry D. Hinzman, Lilian Alessa, John J. Cassano, Molly Chambers, Kelly Falkner, Jennifer Francis, William J. Gutowski Jr., Marika Holland, R. Max Holmes, Henry Huntington, Douglas Kane, Andrew Kliskey, Craig Lee, Bruce Peterson, T. Scott Rupp, Fiamma Straneo, Michael A. Steele, Rebecca Woodgate, Daqing Yang, Kenji Yoshikawa, Tinjung Zhang

Geological and Atmospheric Sciences Publications

Dramatic changes have been observed in the Arctic over the last century. Many of these involve the storage and cycling of fresh water. On land, precipitation and river discharge, lake abundance and size, glacier area and volume, soil moisture, and a variety of permafrost characteristics have changed. In the ocean, sea ice thickness and areal coverage have decreased and water mass circulation patterns have shifted, changing freshwater pathways and sea ice cover dynamics. Precipitation onto the ocean surface has also changed. Such changes are expected to continue, and perhaps accelerate, in the coming century, enhanced by complex feedbacks between the ...


Characterization Of Escherichia Coli Isolates From Peritonitis Lesions In Commercial Laying Hens, Darrell W. Trampel, Yvonne Wannemuehler, Lisa K. Nolan Dec 2007

Characterization Of Escherichia Coli Isolates From Peritonitis Lesions In Commercial Laying Hens, Darrell W. Trampel, Yvonne Wannemuehler, Lisa K. Nolan

Veterinary Microbiology and Preventive Medicine Publications

Five clinically normal chickens from three farms (farm A, farm B, and farm C), for a total of 15 clinically normal chickens, were examined bacteriologically. In a similar manner, five dead chickens with lesions of peritonitis from each of the same three commercial egg-laying operations were selected for bacterial culturing. Escherichia coli were isolated from the cloaca in 14 of 15 healthy chickens and from all 15 chickens with peritonitis. Oviducts of normal chickens did not contain E. coli (0/15) whereas oviducts from 13 of 15 hens with peritonitis were positive for this pathogen. No lesions and no E ...


Implementation Of The Federal Highway Administration Final Rule On Work Zone Safety And Mobility, Thomas J. Mcdonald, Jonathan D. Wiegand, Thomas H. Maze Dec 2007

Implementation Of The Federal Highway Administration Final Rule On Work Zone Safety And Mobility, Thomas J. Mcdonald, Jonathan D. Wiegand, Thomas H. Maze

InTrans Project Reports

The Federal Highway Administration published the final rule updating 23 CFR 630 Subpart J in September 2004. The revised rule requires agencies using federal funding to address both safety and mobility in planning and construction of roadway improvements. The Iowa Department of Transportation (Iowa DOT) requested the assistance of the Center for Transportation and Research in developing guidance for a policy and procedures to comply with the final rule.

This report describes an in-depth examination of current Iowa DOT project development processes for all types of improvements, including maintenance, as well as a detailed characterization of work zone impact considerations ...


Evaluation Of Steel Bridges, Volumes I & Ii, Terry J. Wipf, Brent Phares, Justin D. Doornink, Lowell Greimann, Doug L. Wood, Yoon-Si Lee Dec 2007

Evaluation Of Steel Bridges, Volumes I & Ii, Terry J. Wipf, Brent Phares, Justin D. Doornink, Lowell Greimann, Doug L. Wood, Yoon-Si Lee

InTrans Project Reports

This report is divided into two volumes. Volume I summarizes a structural health monitoring (SHM) system that was developed for the Iowa DOT to remotely and continuously monitor fatigue critical bridges (FCB) to aid in the detection of crack formation. The developed FCB SHM system enables bridge owners to remotely monitor FCB for gradual or sudden damage formation. The SHM system utilizes fiber bragg grating (FBG) fiber optic sensors (FOSs) to measure strains at critical locations. The strain-based SHM system is trained with measured performance data to identify typical bridge response when subjected to ambient traffic loads, and that knowledge ...


Nondestructive Evaluation Of Iowa Pavements-Phase I, Halil Ceylan, Alper Guclu, Mustafa Birkan Bayrak, Kasthurirangan Gopalakrishnan Dec 2007

Nondestructive Evaluation Of Iowa Pavements-Phase I, Halil Ceylan, Alper Guclu, Mustafa Birkan Bayrak, Kasthurirangan Gopalakrishnan

InTrans Project Reports

Evaluating structural conditions of existing, in-service pavements is a part of the routine maintenance and rehabilitation activities undertaken by the most departments of transportation (DOTs). In the field, the pavement deflection profiles (or basins) gathered from the nondestructive falling weight deflectometer (FWD) test data are typically used to evaluate pavement structural conditions. Over the past decade, interest has increased in a new class of computational intelligence system, known as artificial neural networks (ANNs), for use in geomechanical and pavement systems applications. This report describes the development and use of ANN models as pavement structural analysis tools for the rapid and ...