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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.
381

The Economics of Smallholder Households in Central Haiti

Kennedy, Nathan S. 14 May 2015 (has links)
Smallholder households in Haiti face many natural resource management challenges. Agricultural production occurs on deforested hillsides prone to erosion. Charcoal is in an important source of income, and woodfuel stocks are often over-exploited. Donor-funded projects and non- governmental organizations have made large investments in programs that promote soil conservation practices and reforestation. Despite the magnitude of the problems and the amount invested, there are relatively few economic analyses of the long-term adoption of soil conservation practices and woodfuel management. This dissertation uses an economics approach to examine the adoption of conservation practices and the management of woodfuel resources in Central Haiti using cross-sectional data covering 600 households. The results show that plot and household characteristics have different effects on adoption across different classes of soil practices, particularly with regard to perceived soil quality, market access, and household health status. The results also provide evidence of the management of charcoal woodfuel stocks on private land. These findings inform the design and targeting of new programs related to soil conservation and reforestation in Haiti and other developing countries. / Ph. D.
382

Social Aesthetics: Affecting Change in Food Provisioning

Ramirez-Blust, Lynda Sue 13 July 2021 (has links)
Food embodies our most intimate relationship with nature. We ingest it to survive. Without it, perish. Through time humans have physically distanced the places of food cultivation from human inhabitation. In recent decades green planning initiatives embraced urban agriculture as a critical element of sustainable communities. However, current approaches to bring food cultivation into cities require labor, capital, and physical resources that are often unavailable in sufficient quantity, quality, or duration for provisioning sites to be considered sustainable. Within each pillar of sustainability - economy, ecology, and equity - barriers exist. Rooted in indigenous land stewardship and food provisioning practices, permaculture (permanent agriculture) offers strategies and tactics to overcome those barriers. Despite mounting evidence that permaculture will result in more sustainable food systems, adoption is limited. Social aesthetics is the term employed by cultural theorists to describe how institutions, social groups, and collective projects codify their values and beliefs. The diffusion of innovation theory suggests that ideas and information from a highly specialized world require translation into a language the rest of society understands to reach widespread adoption. This thesis translates permaculture to contribute to a sustainable social aesthetic for food provisioning and change American food culture. The translation occurs on iconic public land - 'America's front yard'. In 1901 the National Mall was envisaged to serve as a stage on which democratic values are expressed and became the prototype for America's City Beautiful movement. Today, its carpet of lawn framed by American Elm trees epitomizes the economic, ecological, and equity challenges of monoculture landscapes. This project aims to express democratic values through polyculture. It invites every citizen to participate in acts of justice rather than submit to illusions of order and control. From site selection through design, spatial and temporal scale is critical. This thesis explores food's past to understand our present and imagine our future. The design creates an immersive food experience that equips visitors with the knowledge and resources to apply permaculture at the homestead, neighborhood, city, and regional scales. The remade front yard becomes the symbol of a country where places of food cultivation and human inhabitation are one and the same. / Master of Landscape Architecture / Food embodies our most intimate relationship with nature. We ingest it to survive. Without it, perish. Through time humans have slowly increased the distance between where we grow our food (the country) and where we live (the city). In the process, we have built a system where millions of people either suffer from diet-related illnesses or experience hunger on a regular basis. We have damaged our soils and introduced chemicals that have contaminated our waters and polluted our air. We have built a system that both contributes to and is threatened by climate change. Our relationship with nature has become toxic. For decades there have been movements to change, transform, or replace the food system. In cities across the country, these movements appear as organic food in grocery stores, community gardens, urban farms, farmers' markets, farm-to-table restaurants, and more recently, food forests. The problem is each requires labor, capital, and physical resources that are often unavailable in sufficient quantity, quality, or duration for them to be sustainable, let alone scalable. What if there is another way to grow food - a way that heals the soil, decontaminates water, supports biodiversity, and provides enough for everyone? Rooted in indigenous land stewardship and food provisioning practices, permaculture (permanent agriculture) offers strategies and tactics to reverse the negative impacts of the existing food system. Despite mounting evidence that permaculture will result in more sustainable food systems, adoption is limited. For it to become mainstream, someone has to translate it into a language society understands. I try to do that through this thesis. My translation occurs on iconic public land - 'America's front yard'. In 1901 the National Mall was imagined to serve as a stage on which democratic values are expressed and became the prototype for America's City Beautiful movement. Today, its carpet of lawn framed by American Elm trees epitomizes the economic, ecological, and equity challenges of monoculture landscapes. This project aims to express democratic values through polyculture. This thesis explores food's past to understand our present and imagine our future. The design creates an immersive food experience that equips visitors with the knowledge and resources to apply permaculture at the homestead, neighborhood, city, and regional scales. The remade front yard becomes the symbol of a country where places of food cultivation and human inhabitation are one and the same.
383

Ecological Niche Modeling and Sustainable Agroforestry: Climate Change Mitigation for Guatemalan Coffee

Bledsoe, April, Mosher, Danika, Ogden, Mitchell, Ayala, Monica, Joyner, Timothy Andrew, Luffman, Ingrid 12 April 2019 (has links)
Coffea arabica is a species with far-reaching impacts on the global economy. Nevertheless, climate-related challenges threaten the coffee industry at its source: its growing regions. The coffee industry is a significant economic driver in Guatemala, but farmers are increasingly reporting losses in crop yield and arable land due to climate-related challenges. Ecological niche modeling (ENM) can be employed to make predictions about the current and future suitability of regions for a species by identifying significant biotic or abiotic indicators. An ENM was used to project suitable land into the future using climate change projection models known as representative concentration pathways (RCPs), for the coffee plant and a number of other species. Due to the potential of shade trees to lessen heat stress on coffee plants, common shade trees for the region were modeled. Additionally, a fungus species responsible for detrimental coffee leaf rust was modeled. Results of these models indicated potential for substantial climate-related habitat losses for the coffee plant in the coming decades. Examination of model predictions allow for greater understanding of the climate-related variables affecting the ecology of the coffee plant, and the potential risks to the industry, in a changing climate. Additionally, ENM models for coffee rust and shade trees can help Guatemalan farmers make informed decisions about farm management.
384

Ecological Niche Modeling and Sustainable Agroforestry: Climate Change Mitigation for Guatemalan Coffee

Bledsoe, April, Mosher, Danika, Ogden, Mitchell, Ayala, Monica, Joyner, T. Andrew Joyner, Luffman, Ingrid 12 April 2019 (has links)
Coffea arabica is a species with far-reaching impacts on the global economy. Nevertheless, climate-related challenges threaten the coffee industry at its source: its growing regions. The coffee industry is a significant economic driver in Guatemala, but farmers are increasingly reporting losses in crop yield and arable land due to climate-related challenges. Ecological niche modeling (ENM) can be employed to make predictions about the current and future suitability of regions for a species by identifying significant biotic or abiotic indicators. An ENM was used to project suitable land into the future using climate change projection models known as representative concentration pathways (RCPs), for the coffee plant and a number of other species. Due to the potential of shade trees to lessen heat stress on coffee plants, common shade trees for the region were modeled. Additionally, a fungus species responsible for detrimental coffee leaf rust was modeled. Results of these models indicated potential for substantial climate-related habitat losses for the coffee plant in the coming decades. Examination of model predictions allow for greater understanding of the climate-related variables affecting the ecology of the coffee plant, and the potential risks to the industry, in a changing climate. Additionally, ENM models for coffee rust and shade trees can help Guatemalan farmers make informed decisions about farm management.
385

I Think My Great Great Great Grandmother Planted This Tree : - A design proposal for stormwater distribution within the context of urban farming

Isaksson, Christoffer January 2024 (has links)
Today cities are consuming 75% of the world’s resources, which puts significant pressure on areas far from the cities themselves (Stockholm Resilience Center 2022). Food is among the largest drivers of global environmental change contributing to climate change, biodiversity loss, freshwater use, interference with the global nitrogen and phosphorus cycles and land-system change (C40 2024). This thesis describes a proposal for collecting and distributing rain- and stormwater within the context of urban farming and gardening. It explores how design can be a part of creating and promoting self-sufficient cities that are less resource intensive than they are today. Through the lens of Transition Design the proposal are aiming for a positive, system level change and a transition toward desirable long term futures. It can be divided in three sections, The Urban Farmer, The Vessel and The Wooden Aqueducts. The Urban Farmers would live in apartments throughout the city, forming a network of colleagues. The people in the neighborhood would get more understanding of the work that their local farmers do, and they would get more aware of where their food comes from. The vessel collects rain and stormwater and then distributes it when needed. It could act as an object not only for the use of water, but also as a way of sparking discussion, and just as it directs water to the trees, it just as well directs our minds and our attention towards them. The Wooden Aqueducts, inspired by the old craft, could potentially be created as a community practice to engage residents in the surrounding area. When the aqueducts are no longer needed they can remain at the site and be allowed to molder to make the cycles of organic matter visible and to challenge what is considered to be a well managed area. The Urban Farmer, The Vessel and The Wooden Aqueducts are all means to a future vision through a combination of short term, long term, small and big solutions and suggestions.
386

The dynamics of indigenous knowledge pertaining to agroforestry systems of Gedeo: implications for sustainability

Abiyot Legesse Kura 11 1900 (has links)
This dissertation is conducted in Gedeo, with the aim of revealing the dynamics of IK of agroforestry system of Gedeo. The dynamics were seen from the perspective of the intergenerational variation in IK acquisition and transmission. The study investigated drivers of IK changes and continuities and the implications to sustainability. The study employed an interdisciplinary approach whereby geographical concepts and approaches were supplemented by anthropological and developmental psychology approaches and concepts. Thus, an exploratory mixed research approach was used. The dynamics were seen by employing cross-sectional approach. Thus, synchronic data were collected from several sources, by employing ranges of qualitative and quantitative tools. The respondents were drawn from the local people and agricultural experts. Accordingly, 72key informants were chosen through purposive and snowball sampling. To determine the spatio-temporal variation of IK, 290 informants aged between 12 and 65 were chosen using multistage stratified sampling. For the household survey, 252 participants were selected using multistage stratified and systematic random sampling. The qualitative data were analyzed using thematic content analysis and case summary while for quantitative data mean, standard deviation, ANOVA, chi-square, and t-test were employed. The analysis results have shown that the agroforestry system exhibits both indigenous and modern practices. The indigenous practices, which sustained for longer time through generational transfer, appear to be engulfed by modern practice. The study identified knowledge and skill gap between young people and adults. The gap is more significant in normative dimension of IK. This can be attributed to declining rate of IK transmission and acquisition among successive generations, which in turn is attributed to weak contact between young people and adults, and changes in the lifestyle of the young people. Besides, biodiversity loss, demographic pressure, modernization, introduction of market economy, and top-down development approach are among the drivers of the gradual loss of IK. The gradual loss of IK was to have an impact on sustainability of the system. This calls for concerted efforts to maintain the sustainability of IK through revitalization of IK transmission and acquisition. Finally, joint effort is required to document IK, include in school curriculum, and integrate with the modern practices. / Geography / Ph. D. (Geography)
387

Labor access and unequal land holdings among peasant farmers in a lowland and upland community of the Peruvian Amazon

Brisson, Stéphanie January 2003 (has links)
Researchers recognize the need to better understand the factors influencing indigenous land use in order to design sustainable tropical forest management programs. A key relationship that has been long overlooked in peasant societies is the one between communal labor access through social networks and land acquisition/accumulation. This study examines land distribution and labor patterns in traditional agriculture of a lowland and a upland community on the Maranon River near Iquitos, Peru. Data were gathered through household interviews (n=76) and field visits (n=396) between June and November 2001. Results reveal marked variations in access to land and communal labor between and within communities. Household age, initial land wealth and initial inputs of labor are crucial in explaining land and labor inequalities within villages. This research contributes to a better understanding of the factors that give rise to local heterogeneity in wealth holdings and livelihood strategies, necessary tools to promote conservation throughout the region and beyond.
388

The dynamics of indigenous knowledge pertaining to agroforestry systems of Gedeo: implications for sustainability

Abiyot Legesse Kura 11 1900 (has links)
This dissertation is conducted in Gedeo, with the aim of revealing the dynamics of IK of agroforestry system of Gedeo. The dynamics were seen from the perspective of the intergenerational variation in IK acquisition and transmission. The study investigated drivers of IK changes and continuities and the implications to sustainability. The study employed an interdisciplinary approach whereby geographical concepts and approaches were supplemented by anthropological and developmental psychology approaches and concepts. Thus, an exploratory mixed research approach was used. The dynamics were seen by employing cross-sectional approach. Thus, synchronic data were collected from several sources, by employing ranges of qualitative and quantitative tools. The respondents were drawn from the local people and agricultural experts. Accordingly, 72key informants were chosen through purposive and snowball sampling. To determine the spatio-temporal variation of IK, 290 informants aged between 12 and 65 were chosen using multistage stratified sampling. For the household survey, 252 participants were selected using multistage stratified and systematic random sampling. The qualitative data were analyzed using thematic content analysis and case summary while for quantitative data mean, standard deviation, ANOVA, chi-square, and t-test were employed. The analysis results have shown that the agroforestry system exhibits both indigenous and modern practices. The indigenous practices, which sustained for longer time through generational transfer, appear to be engulfed by modern practice. The study identified knowledge and skill gap between young people and adults. The gap is more significant in normative dimension of IK. This can be attributed to declining rate of IK transmission and acquisition among successive generations, which in turn is attributed to weak contact between young people and adults, and changes in the lifestyle of the young people. Besides, biodiversity loss, demographic pressure, modernization, introduction of market economy, and top-down development approach are among the drivers of the gradual loss of IK. The gradual loss of IK was to have an impact on sustainability of the system. This calls for concerted efforts to maintain the sustainability of IK through revitalization of IK transmission and acquisition. Finally, joint effort is required to document IK, include in school curriculum, and integrate with the modern practices. / Geography / Ph. D. (Geography)
389

Labor access and unequal land holdings among peasant farmers in a lowland and upland community of the Peruvian Amazon

Brisson, Stéphanie January 2003 (has links)
No description available.
390

Vi-skogens kommunikation om sin verksamhet till intressenter : - Retoriskanalys av bild och text

Bärgård, Jennifer January 2016 (has links)
ABSTRACT Vi-Agroforestry communication has been studied to see how they use communication as a tool to attract donors. The aim is to be able to contribute to shed some light on the importance of image and text as a unified communication. Its about acknowledge what the sender (aid organization) sends out to tell potential donors. It examines how the organization communicates the problems they want to solve, which method they want to solve it with and why their organization should be the preferred option before the interest is gone by the recipient. By examine the reliability (ethos), the emotional connection (pathos) and the factual conviction (logos) of the Vi Agroforestry communication it helps to understand the organizations way of communicate with their listeners. The study examined Vi-Agroforestry communication through image and text. The author hopes to contribute to explore what an aid organization, like Vi-Agroforestry, choose to focus on regarding when they get to talk about their organization and their work. The organization has been analyzed based on the rhetorical basics to go on to see which framework they create their communications. / SAMMANFATTNING Vi-skogens kommunikation har studerats för att kunna se på hur de använder sig av kommunikation som verktyg för att locka givare. Förhoppningen är att kunna bidra med att öppna upp betydelsen av bild och text i sitt sammanhang vid kommunikation. Det handlar om vad avsändaren (biståndsorganisationen) skickar ut för att nå ut till potentiella givare. Det undersöks hur organisationen kommunicerar ut de problem som de vill lösa, vilken metod de vill lösa den med och varför just deras organisation ska vara det självklara alternativet innan intresset är borta hos mottagaren. Detta studeras med hjälp av att undersöka den tillförlitlighet (ethos), den känslomässig koppling (pathos) och den saklig övertygelse (logos) i Vi-skogens kommunikation. Studien studerat Vi-skogens kommunikation genom bild och text. Författaren hoppas bidra med att undersöka vad en biståndsorganisation, som Vi-skogen, väljer att belysa och fokusera på när de själva får berätta om sin organisation och sitt arbete. Organisationen har analyserats utifrån de retoriska grunderna för att gå vidare för att se vilket ramverk de skapar sin kommunikation.

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