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Full-Text Articles in Life Sciences

Renting And Selling Cornstalks, William M. Edwards Oct 2003

Renting And Selling Cornstalks, William M. Edwards

Integrated Crop Management News

Dry weather has created a shortage of pasture and hay for many Iowa livestock producers. However, cornstalks are an abundant source of winter feed for beef cows in Iowa. When cornstalks are supplemented with protein, vitamins, and minerals, they can supply the nutritional needs of cows that are in moderately good body condition during fall and early winter.


Sheep Updates 2003 - Wool, Richard Coole, Stephen Gherardi, Chris Oldham, K. Curtis, J. Stanton, Johan Greeff, Chris Oldham, Mike Hyder, Beth Pagamoni, Andrew Thompson, Tom Plaisted, Kazue Tanaka, Mike Ferguson, Darren Gordon, Andrew Peterson, Peter Sommerville Aug 2003

Sheep Updates 2003 - Wool, Richard Coole, Stephen Gherardi, Chris Oldham, K. Curtis, J. Stanton, Johan Greeff, Chris Oldham, Mike Hyder, Beth Pagamoni, Andrew Thompson, Tom Plaisted, Kazue Tanaka, Mike Ferguson, Darren Gordon, Andrew Peterson, Peter Sommerville

Sheep Updates

This session covers six papers from different authors:1.‘Pastures from space’ - an opportunity to increase the profitability of sheep production Richard Coole Farmer Kojonup W.A. Stephen Gherardi Chris Oldham Department of Agriculture Western Australia 2. K. Curtis Department of Agriculture WA J. Stanton Department of Agriculture WA and Curtin University 3. Is selection of ewe hogget replacement on measurement profitable? Johan Greeff Department of Agriculture of Western Australia 4. Optimising the nutrition/grazing management of ewe flocks Chris Oldham Mike Hyder Beth Paganoni Department of Agriculture of Western Australia Andrew Thompson Department of Primary Industries, Hamilton, Victoria Tom ...


Organic Vs. Conventional Farming Systems, Michael D. Duffy, Matthew Z. Liebman, Kenneth T. Pecinovsky Jan 2003

Organic Vs. Conventional Farming Systems, Michael D. Duffy, Matthew Z. Liebman, Kenneth T. Pecinovsky

Iowa State Research Farm Progress Reports

Organic agriculture has become a major industry in the last decade, driven by increasing consumer demand, price premiums, and improving market opportunities. In 1977, a study was started at the Northeast Research and Demonstration Farm to demonstrate two alternative farming systems.


An Economic Perspective On Iowa Farm Diversification In The Twentieth Century, Matthew Edward Miller Jan 2003

An Economic Perspective On Iowa Farm Diversification In The Twentieth Century, Matthew Edward Miller

Retrospective Theses and Dissertations

The thesis examines farm-level diversification in Iowa over the past century. Economic theory is employed to propose explanations for observed trends in diversification. The hypothesis says that agricultural production technology has been the driving force behind the emergence of large, highly specialized farms in Iowa. Applications from portfolio theory, the theory of the farm, and agronomics are also utilized to flesh out the theory section. Two indexes, entropy and the Hirschman-Herfindahl index, are constructed using production and price data from the Census of Agriculture. The indices show diversification as relatively constant from 1885 to 1930, after which, a strong specialization ...


Identifying The Driving Forces Of Rural Economic Growth: The Impact Of Intellectual Spillovers, Technology, And Amenities On Employment Growth In The Us Midwest , Daniel Charles Monchuk Jan 2003

Identifying The Driving Forces Of Rural Economic Growth: The Impact Of Intellectual Spillovers, Technology, And Amenities On Employment Growth In The Us Midwest , Daniel Charles Monchuk

Retrospective Theses and Dissertations

This dissertation examines a number of issues related to economic growth in rural regions. The major themes explored are the roles of spatial technological externalities in the creation of new knowledge, the impacts of technology and technology spillovers on non-farm employment growth, and the role of amenities influencing non-farm employment growth. The theoretical model examines the interaction between rural and urban areas in an overlapping generations model allowing migration of high skill workers. The major theoretical conclusions reached suggests: (1) if technology spillovers exist in the urban market then high skill individuals will seek employment in the urban area where ...


2003 Nebraska Swine Report, Duane E. Reese Jan 2003

2003 Nebraska Swine Report, Duane E. Reese

Historical Materials from University of Nebraska-Lincoln Extension

This publication was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. It deals with the results that were done in reproduction, breeding, health, genetics, nutrition, economics and housing of swine.


A Creation Perspective On Economics, Ecology And Environment, Howard J. Fisher Jan 2003

A Creation Perspective On Economics, Ecology And Environment, Howard J. Fisher

Science and Mathematics Conference Papers

This paper discusses the creation perspective on economics, ecology and the environment and looks at the problems of species extinction, habitat destruction, land degradation, and pollution of the waters and the atmosphere.


A Stochastic Model Of Maize Gene Dispersal, David G. Ripplinger Jan 2003

A Stochastic Model Of Maize Gene Dispersal, David G. Ripplinger

Retrospective Theses and Dissertations

The spatial distribution of maize genes is predicted using a two dimensional Lagrangian stochastic (LS) model that meets sub-inertial and well-mixed conditions. Using wind data from central Iowa, a Weibull distribution is fit. From this distribution, a series of Monte Carlo simulations are run using the LS model in three forms. The final two forms of the model are based on USDA regulations for the production of pharmaceutical producing corn, demonstrating the model's suitability for analyzing the risk of transgene dispersal in maize. Special considerations are given to the large size of maize pollen, the likelihood of pollen seepage ...


Second Moment Characterization Of Agricultural Export And Income Projection Models, Andrew Dean Miller Jan 2003

Second Moment Characterization Of Agricultural Export And Income Projection Models, Andrew Dean Miller

Retrospective Theses and Dissertations

Agricultural outlook baseline projections published by FAPRI, USDA and the OECD are intended as policy analysis tools. It is shown that projections have been used as forecasts. Therefore, users of baseline projections need information about the past performance of baseline projections. This thesis measures the projection errors of baseline projections using RMSE and MAPE and assesses the ability of models to predict directional movements. The baseline model results are compared to corresponding results of naive models. For projection errors, a mixed model is used to estimate the mean bias and confidence intervals about the mean. Projections of corn, soybean, wheat ...


Factors Affecting Symbolic And Use Adoption Of Local Foods For Consumers In Black Hawk County, Iowa, Erin M. Tegtmeier Jan 2003

Factors Affecting Symbolic And Use Adoption Of Local Foods For Consumers In Black Hawk County, Iowa, Erin M. Tegtmeier

Retrospective Theses and Dissertations

A local food system may be an alternative to the increasingly globalized and concentrated food market and a means to augment the availability of fresh foods, create economically viable options for farmers and enhance the health of local ecosystems. Consumers are a vital component of these systems. Insight into the decision-making process surrounding the purchase of local foods can aid in efforts to build thriving local food systems. Studies on consumer attitudes show that, in general, consumers are aware and supportive of local foods. Abstract or civic factors, such as concern for the environment or food safety, are often identified ...


Investment Analysis Of Deferring A Farmer Owned Ethanol Plant: Using Real Options, Ramanathan Shunmugavelu Jan 2003

Investment Analysis Of Deferring A Farmer Owned Ethanol Plant: Using Real Options, Ramanathan Shunmugavelu

Retrospective Theses and Dissertations

A farmers owned value-added (FOVA) business is often subject to changes in the political situations. So an investment analysis tool that incorporates uncertainty, such as real options is more appropriate. Application of real options is limited in FOVA businesses. In this thesis, the concept of real options is applied under the framework of a farmer owned ethanol plant. The impact of changes in the policy or political situations on ethanol industry is well known. Farmer investors that are currently interested in investing in an ethanol plant should decide whether it is worthwhile to invest now or wait for a year ...


Ec03-219 2003 Nebraska Swine Report, Duane Reese Jan 2003

Ec03-219 2003 Nebraska Swine Report, Duane Reese

Historical Materials from University of Nebraska-Lincoln Extension

The 2003 Nebraska Swine Report was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. This publications deals with research on swine reproduction, breeding, health, nutrition, economics, and housing.


Comparison Of Different Styles Of Swine Finishing Facilities Within A Uniform Production System, David R. Stender, Jay D. Harmon, Jerry D. Weiss, Darci Cox Jan 2003

Comparison Of Different Styles Of Swine Finishing Facilities Within A Uniform Production System, David R. Stender, Jay D. Harmon, Jerry D. Weiss, Darci Cox

Agricultural and Biosystems Engineering Publications

Swine originating from one farrowing and nursery source were grown in five different finishing facility types. Three of the facilities were considered contemporary styles and two facilities were based on older technologies. The total data set included information collected on 46,408 pigs from 25 groups. The three contemporary facility styles included a fully slatted, hybrid ventilated facility; a fully slatted tunnel ventilated facility; and a partially slatted naturally ventilated facility. These newer facilities were compared to an older, less environmentally controlled facility and an outdoor feeding lot. No significant differences were observed in production performance of the three styles ...