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Using Vegetation To Reduce Nitrogen Runoff In California Caneberries, Rebecca Riesenfeld

Master's Theses

With a 700% rise in global fertilizer use in the last 50 years, agricultural lands are a significant source of nitrogen and phosphorus pollution in aquatic ecosystems worldwide. Record high levels of nitrate-contaminated runoff from agricultural sources in California's Central Coast are affecting drinking water supplies in the Pajaro Valley and increasingly threatening the ecological health of the Monterey Bay. Bands of vegetation strategically planted to control runoff and soil erosion, or vegetative filter strips (VFS), are used in urban landscapes and at some farm peripheries. On-farm vegetative diversity has been promoted for its contribution to biodiversity and pest control. …

The Shifting Landscape Of Amish Agriculture: Balancing Tradition And Innovation In An Organic Farming Cooperative, Matthew J. Mariola, David L. Mcconnell

All Faculty Articles

In the context of the recent proliferation of alternative operations and marketing schemes across the agricultural landscape, this article examines an Amish organic farming cooperative in northeast Ohio. Contrary to popular perception, the large majority of Amish are not full-time farmers, and those who do farm typically use conventional, chemical-intensive methods. The adoption of certified organic among the Amish is a pragmatic decision that stems from concerns over the sociocultural effects of losing their agrarian heritage, but it also raises challenges that require a careful balance between market imperatives and cultural traditions. We investigate these challenges and the Amish response …

Komera! A Cultural History Of Ethnicity, Agriculture And Poverty In Rwanda, Audra Locicero

Theses & ETDs

This thesis is an exploration of Rwandan culture and society, past and present. Through this work I aim to emphasize the role both land and agriculture have played in shaping the history of Rwanda and its people over time and through many distinct phases. I do so within the context of Rwandan political and agricultural history, choosing to focus on agriculture and pastoralism, as well as colonialism, and their impact on race relations and ultimately the Genocide of 1994. I use the history of ethnicity and agriculture as a tool for examining issues of post-genocide Rwandan society, specifically the cycle …

The Influence Of Plants On Atmospheric Methane In An Agriculture-Dominated Landscape, Xin Zhang, Xuhui Lee, Timothy J. Griffis, John M. Baker, Matt D. Erickson, Ning Hu, Wei Xiao

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The primary objective of this study was to clarify the influence of crop plants on atmospheric methane (CH₄) in an agriculture-dominated landscape in the Upper Midwest of the United States. Measurements were carried out at two contrasting scales. At the plant scale, CH₄ fluxes from soybean and corn plants were measured with a laser-based plant chamber system. At the landscape scale, the land surface flux was estimated with a modified Bowen ratio technique using measurements made on a tall tower. The chamber data revealed a diurnal pattern for the plant CH₄ flux: it was positive (an …

An Inquiry Into Eco-Labeling: The Promise Of Predator Friendly Certification (Pfc), Melissa Ellen Katherine Early

Graduate Student Theses, Dissertations, & Professional Papers

Agricultural landscapes play key roles in preserving biodiversity through habitat protection while providing ecosystem services necessary for rural livelihoods. There is a small, but growing movement among agricultural producers to live with nature rather than to dominate nature. Within this larger agriculture movement are efforts to live with predators rather than eliminating them through lethal means. This is reflective of the changing conversation around predators in the New West. Means of co-existence include livestock guardian animals, electric fencing, fladry, range rider patrols, rotational grazing, and lights etc. One grassroots effort in this area is Predator Friendly Certification (PFC). PFC is …

The Management Of Feral Pig Socio-Ecological Systems In Far North Queensland, Australia, Gabriela Shuster

Antioch University Dissertations & Theses

The development of management programs for socio-ecological systems that include multiple stakeholders is a complex process and requires careful evaluation and planning. This is particularly a challenge in the presence of intractable conflict. The feral pig (Sus scrofa) in Australia is part of one such socio-ecological system. There is a large and heterogeneous group of stakeholders interested in pig management. Pigs have diverse effects on wildlife and plant ecology, economic, health, and social sectors. This study used the feral pig management system as a vehicle to examine intractable conflict in socio-ecological systems. The purpose of the study was …

Food, Fibre And The Future : Report On Surveys Of Students’ And Teachers’ Knowledge And Understanding Of Primary Industries, Kylie Hillman, Sarah Buckley

National Surveys

Primary Industry plays a vital role in Australian’s economy and society, but the gap between rural and urban communities is growing, contributing to a lack of understanding of where food and other basic necessities of life come from. The goal of the Primary Industries Education Foundation (PIEF) is to provide a source of information on primary industries for educators, to better equip students with not only knowledge about what goes into their food and fibres but also what career opportunities exist in primary industries. In 2010, PIEF contracted the Australian Council for Educational Research (ACER) to design and conduct a …

Effects Of Global Climate Change On Nigerian Agriculture: An Empirical Analysis, Apata T. .G

CBN Journal of Applied Statistics (JAS)

This paper presents an empirical analysis of the effects of global warming on Nigerian agriculture and estimation of the determinants of adaptation to climate change. Data used for this study are from both secondary and primary sources. The set of secondary sources of data helped to examine the coverage of the three scenarios (1971-1980; 1981-1990 and 1991-2000). The primary data set consists of 900 respondents’ but only 850 cases were useful. This study analyzed determinants of farm-level climate adaptation measures using a Multinomial choice and stochastic-simulation model to investigate the effects of rapid climatic change on grain production and the …

Teaching To Cultivate Gardening Education Programs In Public Elementary Schools, Andrew Noune

Theses & ETDs

In an attempt to explore ways that the educational system can encourage an understanding of food production systems and their effect on the environment and human health, I explore the components of edible school gardening programs. Eight public elementary school programs in a county in southwest Florida were studied by interviewing the facilitating teachers and observing in-class activities. Components related to horticultural procedures, academic connections, and students' home life were identified and analyzed. The findings of this research suggest that in-ground school gardens are likely to contain more horticultural components and academic connections than earth box or hydroponic gardens. Therefore, …

Least-Cost Control Of Agricultural Nutrient Contributions To The Gulf Of Mexico Hypoxic Zone, Sergey Rabotyagov, Todd Campbell, Manoj Jha, Philip W Gassman, Jeffrey Arnold, Lyubov Kurkalova, Silvia Secchi, Hongli Feng, Catherine L Kling

Articles

In 2008, the hypoxic zone in the Gulf of Mexico, measuring 20 720 km2, was one of the two largest reported since measurement of the zone began in 1985. The extent of the hypoxic zone is related to nitrogen and phosphorous loadings originating on agricultural fields in the upper Midwest. This study combines the tools of evolutionary computation with a water quality model and cost data to develop a trade-off frontier for the Upper Mississippi River Basin specifying the least cost of achieving nutrient reductions and the location of the agricultural conservation practices needed. The frontier allows policymakers and stakeholders …

Climate Change Impact On Agriculture: Devils Lake Basin, Andrei Kirilenko

International Congress on Environmental Modelling and Software

Northern Great Plains is one of the most important agricultural regionsworldwide. This is also a region expected to be heavily impacted by climate change. Thisand two other papers in this session concentrate on studying climate change impacts onwater resources of the region, and on the impacts of these changes on agriculture. Themajor focus of our interest is Devils Lake watershed in North Dakota. The watershed islocated in the Northern Great Plains, the area where intensive agriculture has caused anextreme change in land use and land cover, followed by substantial water pollution. DevilsLake is an endorheic (terminal) lake, which makes it …

Climate Change Impact On Agriculture: Devils Lake Basin, Andrei Kirilenko

International Congress on Environmental Modelling and Software

Northern Great Plains is one of the most important agricultural regionsworldwide. This is also a region expected to be heavily impacted by climate change. Thisand two other papers in this session concentrate on studying climate change impacts onwater resources of the region, and on the impacts of these changes on agriculture. Themajor focus of our interest is Devils Lake watershed in North Dakota. The watershed islocated in the Northern Great Plains, the area where intensive agriculture has caused anextreme change in land use and land cover, followed by substantial water pollution. DevilsLake is an endorheic (terminal) lake, which makes it …

Land Use In The Belgrade Lakes Region, Adrienne Bowles

Atlas of Maine

This map highlights land use in the Belgrade Lakes region in Kennebec County, Maine, including development in urbanized areas, agriculture, forestry, and road networks. The map also includes biotic land cover, such as conserved areas (e.g., forest cover, wetlands, etc.) as well as locations of major bodies of water.

Suitability Of Land For Agriculture In Tanzania, Taylor Tully, Megan Browning

Atlas of Maine

Agriculture is vital to the economy of Tanzania, providing many jobs and contributing to a large portion of the GDP. This project sought to answer the following question: What land is suitable for agriculture in Tanzania? We hypothesized that in addition to land currently in use for agriculture, there would exist additional land suitable for agriculture that had not yet been realized as such. We used logistic regression to created a model that predicted agricultural suitability across the country. We evaluated twenty variables and came up with nine predictors of agriculture that we included in our final model. The results …

An Artesian Well System In Beaver Crossing, Nebraska, It's Development And Demise, Mary Lanik

Department of Environmental Studies: Undergraduate Student Theses

ABSTRACT

Nebraska has a veritable wealth of groundwater. The High Plains Aquifer underlies most of the state, and within its sand and gravel deposits, many interconnected aquifers provide fresh water for a variety of uses.

One of the most spectacular examples of this resource is the artesian well. Beaver Crossing, Nebraska was once home to one of the most prolific artesian systems in the state before its demise. Founded in the 1880’s, Beaver Crossing soon became known for its many artesian wells, that provided leisure activities and supported profitable business ventures such as small farming, ice production and aquiculture. Eventually …

Cellulosic Ethanol: The Benefits, Obstacles, And Implications For Nebraska, Cassidee Lin Thompson

Department of Environmental Studies: Undergraduate Student Theses

Abstract Ethanol is a biofuel that has unique capabilities to mitigate global climate change by reducing greenhouse gas emissions while simultaneously supporting rural economies and decreasing the United States’ dependence on foreign oil. Currently, the state of Nebraska depends on corn ethanol, which may be unsustainable. Cellulosic ethanol is a promising alternative but it is not without its problems, including high production costs and potential environmental damage. This thesis is an attempt to understand the benefits, downfalls, and processes of corn-based and cellulosic ethanol and the potential implications to Nebraska. This research should shed some light on the current obstacles …

The Influence Of Nutrients And Physical Habitat In Regulating Algal Biomass In Agricultural Streams, Mark D. Munn, Jeffrey Frey, Anthony Tesoriero

United States Geological Survey: Water Reports and Publications

This study examined the relative influence of nutrients (nitrogen and phosphorus) and habitat on algal biomass in five agricultural regions of the United States. Sites were selected to capture a range of nutrient conditions, with 136 sites distributed over five study areas. Samples were collected in either 2003 or 2004, and analyzed for nutrients (nitrogen and phosphorous) and algal biomass (chlorophyll a). Chlorophyll a was measured in three types of samples, fine-grained benthic material (CHLFG), coarse-grained stable substrate as in rock or wood (CHLCG), and water column (CHLS). Stream and riparian habitat were characterized at each site. TP ranged from …

Rooted: A New Generation Of Farmers And Ranchers In Montana, Beth Jeannette Gibson

Graduate Student Theses, Dissertations, & Professional Papers

Rooted tells the stories of a new generation of farmers and ranchers in Montana through still photography and written profiles; the project is the result of 13 site visits and interviews. I define “new farmer” as a person operating their own agricultural business for 10 years or fewer, though this definition gets blurred and complicated when referring to people who return to their family’s farm or ranch. Admittedly, this project features only a few of the beginning farmers and ranchers in Montana. My intention is not to provide an exhaustive study of the next generation of farmers and ranchers in …

Sugar Ethanol In Florida: Economic, Agricultural, And Environmental Aspects, Joshua F. Berger

USF Tampa Graduate Theses and Dissertations

Ethanol production has been widely perceived as a solution to the global energy crisis, with the added benefit of reinvigorating declining agricultural economies. Moves towards dedicating crop production to ethanol however have raised a number of concerns related to its economic and environmental consequences. Missing from this debate is a consideration of the ways in which sugar can be used as a feedstock for ethanol, an issue that is especially pertinent within the state of Florida. The national commitment and scale of corn ethanol production in the U.S. has largely meant a lack of focus on other feedstocks which could …

Applications And Potentials For Biogenic Methane Recovery Operations In Nebraska Agriculture, Industry, And Economic Development, David Micheal Dingman

Department of Environmental Studies: Undergraduate Student Theses

ABSTRACT: This thesis report illustrates the applications and potentials of biogenic methane recovery in Nebraska’s agricultural and industrial sectors and as a means for increasing sustainable economic development in the state’s rural communities. As the nation moves toward a new green economy, biogenic methane recovery as a waste management strategy and renewable energy resource presents significant opportunities for Nebraska to be a national and world leader in agricultural and industrial innovation, advanced research and development of renewable energy technology, and generation of new product markets. Nebraska’s agricultural economy provides a distinct advantage to the state for supporting methane recovery operations …

Changes In Producer Attitudes Towards Windbreaks In Eastern Nebraska, 1983 To 2009, Kim Tomczak

Department of Environmental Studies: Undergraduate Student Theses

Abstract Windbreaks are rows of trees or shrubs arranged on the landscape to reduce wind speed. In agricultural landscapes we find them as farmstead windbreaks, livestock windbreaks and field windbreaks. While farmstead and livestock windbreaks are well accepted by the agricultural community, field windbreaks are often viewed differently. A 1982 study of the attitudes of farmers in Eastern Nebraska indicated that many of the producers were around the age of 50 and that they used different types of windbreaks. This study repeated that survey in the same. When compared to data from 1982, farmers today are not educated about the …

A Wild Web: The Tangled History Of Attitudes Toward Wildlife In A Dynamic New England Culture, 1945--1985, Mary H. Hopkins

Doctoral Dissertations

Attitudes toward wildlife are considerably more complex than one might suspect. This dissertation started with a hypothesis that population growth would correlate with increasing negative attitudes toward wildlife, but historical evidence only partially supports this hypothesis. Information about the frequency and types of wildlife references appearing in newspapers between 1945 and 1985 was gathered from a systematic sampling of six New Hampshire newspapers that represented towns with differing growth trends. While analysis of quantitative data minimized any correlation between growth and negative attitudes, qualitative data from newspaper articles, archival sources, government reports, books and articles, and other sources provided evidence …

Non-Blackbird Avian Occurrence And Abundance In North Dakota Sunflower Fields, Dionn A. Schaaf, George M. Linz, Curt Doetkott, Mark W. Lutman, William J. Bleier

The Prairie Naturalist

Sunflower fields are well-documented as foraging habitat for fallmigrating blackbirds (Family Icteridae). There is, however, a paucity of information on the use of sunflower fields by non-blackbirds. We assessed non-blackbird use of 12 ripening sunflower fields in the Prairie Pothole Region of central North Dakota. From mid-August to mid-October 2000, we counted 4,129 individual birds, consisting of 22 families and 61 species, in the sample fields and within 5 m of the field edges. We saw the largest number of birds from 18 September to 27 September. The Family Emberizidae (sparrows) accounted for 26% of the species and 20% of …

Integrated Modeling Of Nitrate Contamination Of Groundwater In Agriculture-Dominated Watersheds, M. Almasri, Jagath J. Kaluarachchi

Civil and Environmental Engineering Faculty Publications

This paper presents and implements a framework for modeling the impact of land use practices and protection alternatives on nitrate pollution of groundwater in agricultural watersheds. The framework utilizes the national land cover database (NLCD) of the United State Geological Survey (USGS) grid and a geographic information system (GIS) to account for the spatial distribution of on-ground nitrogen sources and corresponding loadings. The framework employs a soil nitrogen dynamic model to estimate nitrate leaching to groundwater. These estimates were used in developing a groundwater nitrate fate and transport model. The framework considers both point and non-point sources of nitrogen across …

Contamination Levels Of Selected Organochlorine And Organophosphate Pesticides In The Selangor River, Malaysia Between 2002 And 2003, Kok Hoong Leong, Benjamin L.L. Tan, Ali Mohd Mustafa

Research Publications (2006 to 2010)

In Malaysia, rivers are the main source of public water supplies. This study was conducted from 2002 to 2003 to determine the levels of selected organochlorine and organophosphate pesticides in the Selangor River in Malaysia. Surface water samples have been collected seasonally from nine sites along the river. A liquid-liquid extraction followed by gas chromatography-mass spectrometry technique was used to determine the trace levels of these pesticide residues. The organochlorine pesticides detected were lindane, heptachlor, endosulfan, dieldrin, endosulfan sulfate, o,p'-DDT, p,p'-DDT, o,p'-DDE and p,p'-DDE whereas for organophosphate pesticides, they were chlorpyrifos and diazinon. At the river upstream where a dam …

Standing Closest To The Flame: Community Wildfire Planning And The Healthy Forest Act, William E. Fleeger

Doctoral Dissertations

Recently, national fire policy has been redirected from a primary focus on suppression towards a more integrated and comprehensive approach developed at the community level. As part of this policy shift, Congress passed the Healthy Forest Restoration Act (P.L. 108-148) in 2003 encouraging communities to develop community wildfire protection plans (CWPPs) to guide fuel reduction and wildfire mitigation efforts on both federal and nonfederal lands. This research examines U.S. Forest Service (USFS) and community collaboration in the development of CWPPs through a case study analysis of four communities in two western states. The social and decision-making processes used in the …

Sustainability Of New Hampshire's Sawmill Industry And Its Forest Resource Base, Difei Zhang

Doctoral Dissertations

Sustaining our forests is vital for a healthy ecosystem and for the future of forest industry. To sustain the regional sawmill industry as well as the associated forest resource base, the key is to track the consumption and inventory of eastern white pine (Pinus strobus L.), the most dominant commercial species in New Hampshire. This research profiled the sawmill industry in New Hampshire and Vermont in terms of production, consumption, labor characteristics and regulating economic and policy issues. We examined the sustainability of the industry and its resource base; with a specific focus on the white pine sawmill industry and …

High Frequency Measurements Of Soil Carbon Dioxide Flux At Harvard Forest, Stephen C. Phillips

Master's Theses and Capstones

Soil carbon dioxide flux was measured by automatic chambers at Harvard Forest over a four-year period, 2003-2006. The autochambers were installed along a moisture gradient from upland to wetland soils. In 2003, fluxes from the upland and mid-slope chambers exceeded the fluxes from the wetland margin. In 2004-2006, the mid-slope fluxes were significantly larger than both the upland and wetland margin chambers. The differences in flux between chamber location were most pronounced in the late summer and early fall. Residuals from a non-linear temperature regression exhibit a distinct seasonal pattern in 2003, 2004, and 2006, but not in 2005. On …

Forests And Farming: An Analysis Of Rural Livelihood Programs For Poverty Reduction In Eastern Zambia, Garrett Kenneth Olson

Graduate Student Theses, Dissertations, & Professional Papers

This paper investigates the effectiveness of Joint Forest Management (JFM) and agricultural programs at reducing rural poverty in Zambia. Community-based natural resource management (CBNRM) programs in Africa have been aimed at improving livelihoods, creating tangible benefits, and increasing incomes from forests and forest products through the sustainable use and conservation of forest resources. Agricultural programs have often had similar goals regarding improved livelihoods, benefits, food security, and income generation for soil conservation and reduced forest conversion due to agricultural expansion. With increased rates of deforestation and forest conversion, Zambia is in need of effective measures for the sustainable utilization and …

Slides: Taking The Long View: Doing Something About Climate Change, David Getches, Susan Avery, Maggie Fox, Roger Pielke

Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)

Presenter: Maggie Fox, President, America Votes, Boulder, CO.

Presenter: Susan Avery, Interim Provost and Executive Vice-Chancellor for Academic Affairs, University of Colorado.

Presenter: Roger Pielke, Jr., Professor, Environmental Studies, Center for Science and Technology Policy Research, University of Colorado.

4 slides.