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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.
241

Comparison of soil properties between conventional and organically managed farms in eastern and central France

Lévesque, Micheline January 1993 (has links)
Field plots under organic and conventional management system were investigated to detect the effects of soil management practices on their soil physical, chemical and microbiological properties. The 16 farms studied, located in France, were arranged into eight matched pairs (organic/conventional). / The study revealed that in comparison with the conventionally managed soils, the organically managed soils tended to have equal to higher pH, buffering capacity, Ca, organic matter and moisture contents, and lower potential acidity values, as well as higher numbers of aerobic mesophyle and lactobacilli, and more intense alkaline phosphatase activity. The differences in soil properties between the members of matched pairs, in general were relatively small. / Soil organic matter content and nutrient availability (Ca, P), the use of lime and/or soil CaCO$ sb3$ concentrations, and use of chemical fertilizers and pesticides were found to have an influence on soil microbial activity. Soil and crop type were also found to influence some of the chemical and biological properties.
242

An integrated agroecosystem analysis model for tropical wetlands in Veracruz Mexico

Mendiola, J. L. Reta January 1999 (has links)
No description available.
243

How do (or can) local farmers make it work? / How can local farmers make it work?

Tunnicliffe, Robin 17 October 2011 (has links)
Small, locally-marketing farms are garnering more attention with regard to their ability to supply their regions with food. Their economic viability is called into question because if they cannot sustain themselves financially, they cannot be relied upon as an alternative food system. This paper looks at economic viability and ask the question “how are farmers making it work?” Data is based on a 25 interviews with farmers on the Saanich Peninsula, British Columbia, Canada. The decision to continue running a farm year to year is complex. The answer to valuing these farms may come by looking at the productivity of the farms, their many services to the environment and to their communities, rather than just the financial picture. Farmers are finding ways to retain more of the value of their productivity from transactions with customers. Navigating the regulatory environment remains a challenge. The paper concludes with policy recommendations. / Graduate
244

An Examination of the potential impacts of food safety management programs on community farms

Hughes, Kathryn 11 April 2012 (has links)
On-farm food safety management programs are increasingly a part of business for horticultural and livestock producers. Originally designed for export oriented food manufacturers, they are now promoted to smaller and domestically oriented farms as well. This thesis explores the potential impacts these programs can have on on small scale, ecological and locally oriented "community" farms. The food safety management approach explored involves a HACCP analysis, "Good Agricultural Practices" and an audit-based verification system. The research is based largely on interviews with community farmers on southern Vancouver Island, British Columbia. Findings indicate that in addition to the (widely acknowledged) financial disadvantages that these programs can present to small scale businesses they can also have significant socio-cultural impacts on community farms specifically. In particular, food safety programs can require farmers to focus on food safety objectives to the exclusion of other priorities. This can compromise their ability to practice ecological methods of food production. Also, the HACCP programs explored impose a commercial-style administrative model onto farms to facilitate a textually enacted demonstration of "safe food production". Such an approach does not account for the social regulatory mechanisms in place in localized markets and could require considerable reorganization for community farms. Finally, HACCP programs redefine the role of farmers such that their authority and autonomy are diminished, and the nature of farm work becomes managerially oriented. The impacts identified suggest that the community agricultural sector merits particular consideration in the development and implementation of food safety policies and programs. / Graduate
245

Deconstructing the degradation debate : a study of land degradation in the Uluguru Mountains, Tanzania

Jones, Samantha January 1995 (has links)
No description available.
246

Local management of natural resources in southern Burkina Faso

Howorth, Christopher Nigel January 1997 (has links)
No description available.
247

Recent human impact and land use change in Britain and Ireland : a pollen analytical and geochemical study

Morriss, Sarah Helen January 2001 (has links)
No description available.
248

Nitrogen balance and changes in soil nutrients in reduced inputs systems of cropping

Semple, Adelaide Mary January 1998 (has links)
No description available.
249

Learning to Practice Transitional Agriculture: An Action Research Thesis

Gomathy Palaniappan Unknown Date (has links)
Abstract This is an action research thesis, which documents a reflexive process of change undergone by farmers in making transitions from conventional farming to alternative farming. I achieve this through the process of answering the central research question for this thesis: How can the capacity of farmers be developed in the best way to assist them in making the transition from conventional to alternate farming systems? The original starting point for this study was concerned with addressing the problems of conventional farming. The consequences of which are arguably the continued risks to farmers’ lives and natural resources as witnessed in India. However, as the study progressed I realized that changing from conventional farming to alternative farming like organics, biodynamics, permaculture and natural farming involved more than simply a change in farmers’ practices. It was also closely intertwined with broader issues such as farmers’ epistemological relation to the soil and the ontological construction of theories and concepts based on their values and beliefs that influenced their methodological practices. In order to examine the wider issues around transitions to alternative farming, this study was conducted in two regions. Namely, Australia, as an example of the western world practicing modern agriculture and India, as an example of the developing world utilising indigenous farming practices. The early cycles of my study occurred through immersion. This included my firsthand experience as an extension scientist in India and my direct involvement in a series of events in Australia, which assisted in framing the research question. To document the reflexive process of change undergone by farmers in transitions from conventional farming to alternative farming, I conducted convergent interviews with 20 participants in Australia and 18 participants in India. The results of these interviews elicited six major themes as follows: 1. Enriching soil health through perceptional change 2. Knowledge sharing through networking 3. Diversifying through biophysical and socio-cultural processes 4. Learning through experience 5. Indigenous knowledge built through accumulated experiences 6. Self sufficiency through recycling farm resources. Having identified these six themes, I proceeded to construct a tool for each theme so as to merge theory and practice and to address the fact that there are currently inadequate tools available for practitioners seeking to facilitate the change to alternative farming systems. The tools for the respective themes are as follows: 1. Typology on perception of soil in relation to practice 2. Dynamics of knowledge sharing influencing transition 3. Key components for diversity 4. Conditions that facilitate experiential learning for transition 5. Conceptual tool to capture beliefs and faiths around the practice 6. Farm sufficiency assessment tool. Finally, I develop and present an overarching tool, Assessing transition process based on themes, which combines all six of the themes and aims to deepen our understanding of the barriers present in the transition process on a larger scale. I also present these tools to six key people in Australia, who were able to confirm or refute their application in practice. Among the seven tools developed, the Typology on perception of soil in relation to practice is viewed as the most significant tool by the majority of the key people consulted for the following reasons: • This tool has the features of inquiry and action. This statement was supported by the key people who observed that the tool both informs the group of participants where they sit (inquiry) and allows them to see where they want to be, which makes them think about their actions. • This tool also has high practitioner relevance and is trans-disciplinary. Importantly, key people from different fields of specialization were able to identify the benefits of the tool in common. • Having said that the tool has a common application it may be used for diverse purposes. For instance, the tool may be used by an engineer or an architect to understand the epistemological relation of a land owner to their land and how this will influence their plans for land use. • The heterogeneous and diverse nature of the tool allows it to be used in any culture. • The tool, in itself, is reflexive in nature as it helps the user to reflect on own actions. It also has the capacity to remind the user of their accountability to the land resource being utilized. • The tool helps participants to think about the most appropriate or best actions for producing actionable knowledge. • The tool is transparent in exhibiting the different possible types of perceptions in relation to the soil, thereby providing the user with the opportunity for future action. Finally, this thesis examines and illustrates the transformational learning of farmers through an analysis of their epistemology and a reconstruction of their epistemology through ontology, which will result in continued transition for transitional agriculture.
250

Transition from foraging to farming in northeast China

Jia, Wei Ming January 2005 (has links)
This thesis is using a framework to analyse the process of transition from foraging to farming in northeast China. Tool complexes analysis is the particular method used to retreive prehistoric economies. Based on the result of these case studies about prehistoric economies in northeast China, this thesis attemp to apply the availability model of transition to farming in northern Europe, proposed by Zvelebil and Rowley-Convy, in the new area northeast China. The result of this research has implicated that the transition to farming in prehistory is the result of the interaction between human societies and environment. among many factors in this interaction, the motivation that prehistoric societies choosing agriculture economy to meet social, political and economic needs would have to be the major one leading to the transition occurred.

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