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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.
31

Sustainable use of soil resource base in the Dominican Republic : a farm level economic analysis of soil conservation practices /

Hwang, Sang Won, January 1992 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 116-123). Also available via the Internet.
32

Essays on soil conservation, social capital and technology adoption

Nyangena, Wilfred. January 1900 (has links)
Thesis (doctoral)--Göteborg Universitet, 2006. / Added t.p. with thesis statement inserted. Includes bibliographical references.
33

A history of the dust bowl /

Floyd, Fred. January 1950 (has links)
Thesis (Ph. D.)--University of Oklahoma, 1950. / Includes bibliographical references (leaves 273-311).
34

Erosion selectivity as affected by tillage-planting systems

Sinukaban, Naik. January 1981 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 87-95).
35

Factors influencing the adoption of soil conservation practices in Virginia's Piedmont Bright Leaf Erosion Control Area

Norris, Patricia E. January 1985 (has links)
The conservation behavior of a sample of farmers in the Piedmont Bright Leaf Erosion Control Area of Virginia is examined to determine the factors which influence the farmers' decisions to use soil conservation practices. The relationship between farmers' use of conservation tillage and other conservation practices and a number of farmer, business, farm community, and ecological characteristics is tested. Results of the analysis are considered in terms of their implications for current and potential conservation programs. This study does not attempt to determine the effectiveness of farmers' conservation efforts for reaching erosion control goals, nor does it provide any basis for determining the appropriate level of erosion control. Using data from personal interviews with a sample of farmers from two counties in Virginia, two models of conservation adoption are estimated. First a Tobit model of expenditures for conservation practices exclusive of conservation tillage is estimated. Second, conservation tillage adoption is considered in a Tobit model of conservation tillage acreage. Results indicate that several factors significantly influence farmers' conservation decisions. Financial factors, such as income limitations and debt levels, are the most important influences on farmers' use of conservation practices. A number of other factors were found to influence conservation expenditures - education, perception of erosion, farm size, off-farm employment, debt, tenure status, tobacco acreage, and conservation planning. Farm size, income and off-farm employment variables were also important to the adoption of conservation tillage. Factors impacting conservation tillage acreage but not expenditures for other practices include age, kinship expectations, race, and erosion potential. Limited resource farmers face particular constraints to the adoption of conservation practices because of the importance of financial factors. However, they are not so constrained in their use of conservation tillage. For the study sample, the limited resource farmers were primarily minority farmers. conservation tillage but not practices. Several of the relationships found to exist have particular implications for current conservation programs and future program changes. / M.S.
36

Effects of surface roughness on erosion of soil by wind

Armbrust, Dean Vincent. January 1962 (has links)
Call number: LD2668 .T4 1962 A74
37

Design guidelines for habitat reintroduction within agricultural landscapes: A demonstration study

Grant, David B. 13 December 2016 (has links)
In southern Manitoba, there is a significant need to reintroduce diverse, ecologically sound environments to redress serious events of watershed habitat loss and accompanying landscape deterioration. Soil erosion, water pollution, and declining wildlife populations are the results of current agricultural practices and policy. The adoption of ecologically sound farming and water management practices compatible with the environmental requirements of native plant and animal communities will restore stability to the local ecosystem, diversity and interest to the landscape and a stronger sense of place for people of the region. This study describes the methods for effectively reintroducing habitat as part of a farms drainage network and the positive effect this has on soil and water conservation, both of which ultimately stimulate increased agricultural production.
38

An evaluation of selected conservation practices in the Snipe Creek Watershed, Marshall County, Kansas

Schmedemann, Ivan Wayne. January 1957 (has links)
Call number: LD2668 .T4 1957 S34 / Master of Science
39

The economic impacts of soil erosion and its control

Badger, Christopher James January 2010 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries
40

Reduced tillage and soil physical properties in continuous wheat

Izaurralde, Roberto Cesar January 2011 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries

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