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Full-Text Articles in Life Sciences

Opportunities And Challenges For Dairy Steer Production In Northwest Iowa, Beth E. Doran, Ron Orth, John D. Lawrence Jan 2004

Opportunities And Challenges For Dairy Steer Production In Northwest Iowa, Beth E. Doran, Ron Orth, John D. Lawrence

Beef Research Report, 2003

A dairy steer survey, co-sponsored by Iowa State University Extension and the Iowa Institute for Cooperatives, was mailed to 635 cattle producers in northwest Iowa to assay the potential opportunities and challenges of feeding dairy steers. Replies from 177 surveys were summarized. Thirty-seven percent cited profitability as the major reason they had fed dairy steers. In comparing beef and dairy steers, reduced feeder calf cost was cited as an advantage with dairy steers. However, market access, finished market price and feed efficiency of dairy steers rated poorer than with beef steers. The biggest challenge to dairy steer production was market ...


The Food Chain Of Sheep And Policy Implications On The Sheep Sector In Syria In Highlight Of International Arrangements, Samir Grad Jan 2004

The Food Chain Of Sheep And Policy Implications On The Sheep Sector In Syria In Highlight Of International Arrangements, Samir Grad

Retrospective Theses and Dissertations

The sheep sector in Syria is considered as one of the most important sectors in animal production because it is the first source of meat, the second source of milk, and an export-oriented sector. Therefore, the need has emerged to study its supply chain in order to identify its weaknesses and bottlenecks and make suggestions for improvement. Accordingly, the theoretical background of food marketing is briefly presented including the functions and tools used by analyzing the marketing process. Hereby, the focus is on the approaches used by analyzing the food chains from various perspectives. In this context, the major actors ...


A Statistical Regression Model To Determine Financial Cash Flow For Wind Energy Based On Tax Structure, Matthew Dae Joong Ritsema Jan 2004

A Statistical Regression Model To Determine Financial Cash Flow For Wind Energy Based On Tax Structure, Matthew Dae Joong Ritsema

Retrospective Theses and Dissertations

A financial cash flow for wind turbines is based on an energy entity's tax structure. Using statistical regression of various wind turbines and wind maps, a theoretical model for energy output was calculated. The turbines were separated by the rated size of the turbine. With the theoretical model, financial output was generated for four different types of tax structures. A total of eight test cases were simulated. Special consideration was given to the impact of Production Tax Credits (PTC) and Renewable Energy Production Incentives (REPI). The object is to determine what type of business and tax structure would have ...


The Economic Potential Of Switchgrass As A Viable Biofuel Alternative, Jennifer E. Reutzel Jan 2004

The Economic Potential Of Switchgrass As A Viable Biofuel Alternative, Jennifer E. Reutzel

Retrospective Theses and Dissertations

To be commercially viable as a bioenergy feedstock, switchgrass must be cost-competitive. Switchgrass production and delivery costs are calculated for the Chariton Valley Switchgrass Biomass Project located in the Chariton Valley, Iowa. Sensitivity analyses are performed to determine which variables have the greatest impact on cost. Switchgrass production costs would require higher than expected market prices, and therefore various incentive payment options are considered. The incentive payments attempt to encapsulate the positive environmental attributes from the production of switchgrass as well as using switchgrass as a clean energy coal substitute. A modified CRP payment, carbon payment, and green tag payment ...


The Impact Of Improved Nutrition On Labor Productivity And Gdp Growth Rate In Low- And Middle-Income Countries, Majd Abdulla Jan 2004

The Impact Of Improved Nutrition On Labor Productivity And Gdp Growth Rate In Low- And Middle-Income Countries, Majd Abdulla

Retrospective Theses and Dissertations

This study examined the effects of nutrition on the growth rate of country economies over time. Previous studies on this topic have resulted in debates among researchers over how significant nutritional effects are on individual country economies. For this study, data were collected for four decades (1960s, 1970, 1980s, and 1990s) for 43 low- and middle-income countries. The data were analyzed to determine the effect of nutrition, represented by dietary energy supply (DES), on the growth rate of gross domestic product (GDP) per worker and on labor productivity. The research utilized ordinary least squares, instrumental variables, and random effects regressions ...


Land Preservation Decisions: Theoretical And Empirical Analysis , Shikha Marwah Jan 2004

Land Preservation Decisions: Theoretical And Empirical Analysis , Shikha Marwah

Retrospective Theses and Dissertations

There is a great concern that human actions are leading to increased rates of extinction of species. Ecologists have pointed out that the most important threat to wildlife comes from habitat alteration. The rapidly increasing human population and the resulting pressing demand for food and living space are pushing highly diverse natural areas into agriculture and other alternative uses. Recognizing this, the Federal agencies and private organizations, such as the Nature Conservancy, are becoming increasingly engaged in programs for conservation of species, where habitat restoration is an important component. However, this conservation is costly and there is uncertainty in the ...


Supply Chain Management Of Differentiated Agricultural Products Under Imperfect Information , Miguel Alberto Carriquiry Jan 2004

Supply Chain Management Of Differentiated Agricultural Products Under Imperfect Information , Miguel Alberto Carriquiry

Retrospective Theses and Dissertations

Participants in a supply chain of agricultural value added products face two significant challenges. First, many of the costly distinctive traits being desired by consumers are difficult (if not impossible) to observe even after consumption. In order for markets for these classes of goods to develop, firms touting the quality of the product need to be trusted. Hence, maintaining an excellent reputation is essential for firms to keep their customers' good will. Secondly, production is conducted in an environment of yield uncertainty, making it impossible for producers and processors to predict with certainty either the quantity or the quality of ...


Panel Econometric Evidence Of Chinese Agricultural Household Behavior In The Later 1990s: Production Efficiency, Size Effects And Human Mobility , Zhuo Chen Jan 2004

Panel Econometric Evidence Of Chinese Agricultural Household Behavior In The Later 1990s: Production Efficiency, Size Effects And Human Mobility , Zhuo Chen

Retrospective Theses and Dissertations

The dissertation consists of three essays that analyze production efficiency, size effects and human mobility using a panel of 591 Chinese agricultural households in the later 1990s.;The first essay estimates technical efficiency through the framework of a translog stochastic production frontier with a behavioral inefficiency component. The results reveal a decreasing trend of output elasticities with respect to labor and fertilizer. The marginal effects of inefficiency terms show significant output gains by eliminating land fragmentation, improving access to education in rural area, and promoting specialization and mechanization.;The second essay examines land heterogeneities and the empirical inverse relationship in ...


Insuring Uncertainty In Value-Added Agriculture: Ethanol, Nicholas David Paulson Jan 2004

Insuring Uncertainty In Value-Added Agriculture: Ethanol, Nicholas David Paulson

Retrospective Theses and Dissertations

A wide variety of insurance products are currently available for agricultural producers to insure against yield or price risks in the markets for the raw commodities they produce. Value-added enterprises, such as ethanol production, have become increasingly popular among farmers over the last decade; however, insurance against declines in the value-added portion of their crops is not yet available. This paper outlines the development of an insurance product aimed at corn producers who are members of an ethanol production cooperative. The product mimics the gross margin level of a typical ethanol production facility, and has the potential to provide producers ...