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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Conservation Reserve Program (CRP) grasses in the Columbia Plateau the effects of time, an invasive annual grass and burning /

Sellereite, Sharon Jones. January 2009 (has links) (PDF)
Thesis (M.S. in environmental science)--Washington State University, December 2009. / Title from PDF title page (viewed on Jan. 22, 2010). "School of Earth and Environmental Science." Includes bibliographical references (p. 18-23).
2

Conservation Reserve Program: relationships between agricultural commodity output prices, input costs, and slippage in Kansas

George, Jacob H. January 1900 (has links)
Master of Arts / Department of Geography / Lisa M. Harrington / The Conservation Reserve Program (CRP) was established by the Food Security Act of 1985 for the purpose of retiring environmentally sensitive cropland for a period of ten to fifteen years. The initial focus of the program was to reduce on-site soil erosion and excess crop production, however the program benefits were later expanded to include water quality and wildlife habitat among others. The overall success of the CRP has been questioned due to the occurrence of slippage. The term ‘slippage’ as it relates to the CRP occurs when producers plant newly cultivated land or fallow acres, offsetting acreage that is retired through enrollment in the reserve program. The goal of this study is to measure the degree to which slippage has affected the CRP within the state of Kansas; and to analyze the relationship between agricultural commodity output prices and input cost with respect to county level slippage rates. Annual slippage calculations for all one-hundred and five counties within Kansas for the period of 1995-2005 reveal significant spatial disparity, with the vast majority of slippage occurring in the western two-thirds of the state. Annual fluctuations in slippage rates varied both regionally and at the county level. Maximum annual slippage was seen in the northwest, with slippage rates in excess of 100 percent; thus the CRP was entirely ineffective in regards to reducing overall land in production. Minimums were located primarily in the southeast and included slippage values below zero percent; indicating a reduction in acreage beyond that of the CRP. To analyze the relationship between agricultural commodity output prices and input costs with CRP slippage, a multivariate regression model was used. The regression analysis ultimately showed a significant lack of fit within the model, indicating the need for additional predictor variables in order to account for variations in CRP slippage rates. Although the model does indicate the presence of a minor relationship between the selected variables of agricultural commodity output prices and input costs with CRP slippage rates, further analysis is needed to identify additional county level variables impacting slippage.
3

Lauver Family Farms: utilizing the Conservation Reserve Program as a risk management tool

Lauver, Andrew James January 1900 (has links)
Master of Agribusiness / Department of Agricultural Economics / Christine Wilson / For five generations, Lauver Family Farms has been founded upon faith, family, and farming near Rockwell City, IA. It is these core principles and beliefs that drive everyday actions through conservation minded decisions, community involvement, and a passion for the land. Presently, the farm is operated by Grandfather Don Lauver, Father Kevin Lauver, and sons Andrew and Jacob Lauver. The Lauver Family Farm was originally purchased in 1942 by Joseph Gordon, who at his peak held 700 acres in his name. In 1945 Glen and Viola Lauver purchased what is now Lauver Family Farms, located on the Des Moines Lobe land region of Iowa. The Des Moines Lobe is a glacial lobe encompassing rich, heavy soils with high organic matter, requiring dredge ditches and tiling in many areas. Through a commitment to conservation, corn and soybean acres are rotated annually. With regard to corn cultivation and planting practices, soybean stubble is field cultivated once, followed by planting. On soybean ground, the corn stalks are disk ripped, and then field cultivated twice before planting soybeans. The goal is to minimize trips through the field by exhibiting these conservation tillage practices. If land has much slope or erosion potential, then it is only disked and then planted. Currently, the farm is comprised of 400 acres of row crops and 50 acres of wetland, 30 acres on the Home Farm and 20 acres on the Obye Farm, enrolled in the Conservation Reserve Program in 2002. Kevin and Don Lauver, the primary decision makers, requested an analysis of the environmental and economic impact of the Conservation Reserve Program on the farm. By taking acres out of production for at least 10 to 15 years that perennially drown due to often wet soil conditions, they will be able to utilize the Conservation Reserve Program as a risk management tool. Now, Lauver Family Farms is faced with a decision to determine if a 10 or 15 year enrollment in the Conservation Reserve Program has the greatest economic and environmental return, since the current enrollment expires in 2016. Procedures and methods were established to meet the purpose of this thesis to determine which option was the most profitable long-term for the operation. The purpose includes evaluating the sources of data relevant to Lauver Family Farms decision by utilizing decision tools to make a collective decision on the future of the farmland and opportunity costs analyzed. Lauver Family Farms’ objective for this project was to determine how the Conservation Reserve Program provides a return on the investment of the decision to re-enroll, or even enroll more acres in the program. This analysis will be used each time an enrollment decision must be made, and will be of significant importance as sons Andrew and Jacob Lauver make management decisions in the years to come.
4

The opportunity cost of the conservation reserve program on Kansas agricultural land

Garr, Dillon Wyatt January 1900 (has links)
Master of Science / Department of Agricultural Economics / Mykel Taylor / Because Conservation Reserve Program (CRP) contracts take land out of production for at least ten years, when deciding to enroll a parcel of land, a landowner must weigh the opportunity costs of hindering production flexibility against a guaranteed constant annual return. This thesis discusses whether having a CRP contract on a parcel of land in any way effects the value of that parcel. This is accomplished through the use of a hedonic model using data from 1998-2014 on Kansas agricultural land transactions. Results show that unlike in previous literature, while the effect of CRP is typically negative, it can become positive depending on the state of market factors at the time of the transaction.
5

The Conservation Reserve Program : its impact on the economies of rural communities

Nofziger, Sharon Dianne 14 December 1987 (has links)
The purpose of this thesis is to present the results of a study of the impacts of the Conservation Reserve Program, Title XII of the Food Security Act of 1985, on the economies of small communities located in Gilliam, Morrow and Umatilla Counties in Oregon. These counties are representative of many rural counties which are extremely dependent on agriculture for their economic well-being. The main objectives of this study are to determine: 1) the economic impacts of an agricultural policy, in this case the CRP, on rural communities; and 2) who may benefit and who may be adversely affected by the policy. As the structure of agriculture continues to change, communities as well as individual farmers, will experience this change in varying degrees. In general, the outlook for rural communities which are so dependent on agriculture is somewhat bleak. The focus of this thesis, therefore, is to attempt to assess the impact of the Conservation Reserve Program on such communities. / Graduation date: 1988
6

Burning, Flaming and Herbicides for Control of Jointed Goatgrass (Aegilops cylindrica Host.)

Willis, Blake D. 01 May 1990 (has links)
Winter wheat stubble and dried plant residue in Conservation Reserve Program (CRP) fields were burned in the fall and spring to evaluate effects on jointed goatgrass (Aegilops cylindrica Host.) seed survival and germination. Laboratory studies were also conducted to determine minimum temperatures and heat duration needed to reduce jointed goatgrass seed viability. Maximum air temperatures attained during various field burns reached from 74 C to over 700 C. Temperatures 2.5 em above the soil surface remained above 400 C for over 10 seconds and above 600 C for 2 to 8 seconds in burning CRP stubble. Results for the winter wheat stubble location were similar with temperatures sustained above 400 C for over 30 seconds. Seed exposure in the lab to 400 and 600 C flames for 1 second reduced germination to 20 and 15 percent, respectively. Germination was reduced to zero with exposures of 10 seconds or more. Oven temperatures of 150 C reduced germination to 85, 57.5, 17.5, 0 and 0 percent for exposures of 20, 30, 60, 120 and 300 seconds, respectively. At 275 C oven temperature germinability dropped to 50% after a 10 second exposure and 0% after a 20 second exposure. Jointed goatgrass plant populations were reduced 54 to 92% after field burning in the spring or fall. Fall burning provided 70 to 85% control of goatgrass the following spring. In non-burned non-disked plots over 90% of emerging plants germinated from seeds on the soil surface. In burned non-disked plots few seeds germinated from on the surface, with 80 to 90 percent of surviving plants having germinated from buried seed. Herbicides provided limited control of jointed goatgrass. None of the herbicides provided greater than 50% control.
7

Examining the Economic Implications and Considerations for Continued Involvement in the Conservation Reserve Program in Texas

Schuchard, Laura Mae 2011 August 1900 (has links)
The Conservation Reserve Program (CRP) has become increasingly important in Texas due to the high level of program participation, particularly in the high plains of Texas. There is also a seemingly large amount of CRP contracts that will expire, particularly in the next five years. As these contracts expire, it becomes very important for landowners to evaluate fully the options that are available for future land use. This research focused primarily on the ten counties in Texas having the most acres of CRP enrollment, which include Gaines, Deaf Smith, Lamb, Hale, Floyd, Dallam, Hockley, Terry, Castro, and Swisher Counties. The primary objective was to provide landowners in these counties with a comprehensive list of options available after CRP contract expiration. The options were identified as re-enrollment in CRP, conversion back into crop production, lease land to a tenant as rangeland, or lease land to a tenant as cropland. Latin Hypercube simulation was used to generate a stochastic value for probable net returns per acre for the four options. The four options were then evaluated based on a variety of methods typically used to rank risky alternatives. The results indicate that CRP enrollment is the most preferred option for landowners. Dryland crop production, while it can return very high net returns per acre, also has the highest amount of risk involved. However, it is important to note that the best ranking method and decision are dependent on the specific decision maker and situation. The second objective of the research was to determine if there are measurable economic impacts to the agricultural services industry associated with CRP enrollment. OLS regression models were only run for five of the ten counties in the study area due to a lack of data reported by the Bureau of Economic Analysis. Of the five counties modeled, the Gaines, Dallam, and Hale County models indicated that CRP has played a significant role in the annual earnings of the agricultural services industry. The results suggest that there would be a benefit in conducting further research to examine the relationship between CRP enrollment and the agricultural services sector.
8

Land use, environmental quality and public policy interactions and implications for agricultural sustainability /

Bendapudi, Ramkumar. January 1900 (has links)
Thesis (Ph. D.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains x, 182 p. : ill. (some col.), maps (some col.). Vita. Includes abstract. Includes bibliographical references (p. 152-162).
9

Essays on natural endowments, conservation policy, and community characteristics /

Lin, Haixia. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 130-135). Also available on the World Wide Web.
10

Biodiversity of ants (Hymenoptera: Formicidae) in restored grasslands of different ages

Phipps, Sarah J. January 2006 (has links)
Thesis (M.S.) University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 27, 2007) Includes bibliographical references.

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