• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 14
  • 4
  • 2
  • Tagged with
  • 24
  • 24
  • 6
  • 5
  • 5
  • 5
  • 5
  • 5
  • 4
  • 4
  • 4
  • 4
  • 4
  • 4
  • 4
  • 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.
11

Pro-poor value chain governance in the mtateni irrigation scheme at Tugela ferry, Msinga, KwaZulu-Natal

Buthelezi, Thokozile Cynthia January 2013 (has links)
Magister Philosophiae - MPhil / This study explored value-chain governance in the Tugela Ferry Irrigation Scheme in KwaZulu-Natal, and presents data on input markets, vegetable production and output markets. Rural poverty is a major problem in post-apartheid South Africa, and smallholder agriculture has been identified by the Economic Development Department as a key component of its New Growth Path framework. Some scholars argue that since water is a scarce resource, irrigation farming should form a key focus of pro-poor land redistribution policy. The 1994 democratic dispensation saw the dismantling of the agricultural homeland parastatals which managed these schemes, causing them to collapse or near collapse. Yet they may have the potential to reduce rural poverty. While markets are key for viable production of fresh produce, some scholars assert that globally, input suppliers, food processors and supermarkets dominate the agro-food industry resulting in negative outcomes for smallholder producers. In South Africa, four major supermarkets (which together claim 55% of retail market share) were in the past located mainly in cities, but the trend now is that they are moving to small towns and townships. There are documented cases where pro-poor governance of fresh produce value chains has resulted in positive outcomes in South Africa. The re-governing markets concept which postulates that a multi-stakeholder approach to making the governance of agricultural value chains pro-poor, is offered as a solution to reducing poverty. This thesis argues that the incorporation of smallholder farmers into modern markets remains ineffective in dealing with poverty because it includes only a few smallholder farmers and those included face exclusion when they are exposed to harsh market conditions.
12

Growing Support: Localism, Nonprofits, and Food Access in Post-Katrina New Orleans

Tranchina, Brent 18 May 2012 (has links)
Problems with food insecurity, such as a lack of access to healthy and affordable food in low-income neighborhoods, has been an ongoing challenge in New Orleans. The damages inflicted by Hurricane Katrina and subsequent citywide flooding on the local food system reduced the numerical count of operational full-service supermarkets and grocery stores throughout the city. The result has been a widespread presence of food deserts and grocery gaps, particularly in low-income neighborhoods. This thesis explores the emergence of food localism practices by food advocacy professionals as a capacity-building tool for New Orleans residents to increase community food security and develop a sustainable local food economy. This paper finds although alternative agro-food networks have increased the availability of healthy and locally produced foods in New Orleans, it provide evidence demonstrating their limited capacity to regularly provide healthy or affordable food in a similar manner to grocery stores in low-income neighborhoods.
13

Biogeochemical functioning and trajectories of French territorial agricultural systems : carbon, nitrogen and phosphorus fluxes (1852-2014) / Fonctionnement actuel et trajectoires biogéochimiques des systèmes agro-alimentaires territoriaux français : analyse des flux de carbone, d’azote et de phsophore (1852-2014)

Le Noë, Julia 24 September 2018 (has links)
Cette thèse décrit les systèmes de production agricole en termes de flux biogéochimiques d’azote (N), de phosphore (P) et de carbone (C) dans les territoires français de 1852 à 2014 suivant une approche socio-écologique qui permet d’appréhender les logiques qui les gouvernent. Les résultats obtenus mettent en lumière à l’échelle des territoires français le lien systémique entre structures de production, bilans N et P et variations des stocks de C organique dans les sols agricoles. Les systèmes agricoles intensifs et spécialisés engendrent les pertes environnementales et les consommations de ressources par unité de surface agricole les plus considérables et accentuent l’ouverture des cycles d’N et de P. Cependant, c’est seulement après la seconde guerre mondiale que certaines régions françaises se sont spécialisées dans la grande culture ou, à partir des années 1980, dans l’élevage intensif. La période des années 1950 à 1980 est marquée par l’accélération des rendements des cultures végétales, de la densité de cheptel et de l’usage des fertilisants minéraux. Les conséquences en ont été une augmentation des bilans N et P et des apports de C aux sols agricoles, causant des pertes considérables d’N vers l’hydrosphère et l’atmosphère et l’augmentation des stocks de P et de C dans les sols. Néanmoins, l’accumulation du C n’a été rendue possible que par le recours aux fertilisants minéraux et au machinisme agricole consommant des énergies fossiles. Ainsi, le stockage du C dans les sols représente un effet secondaire du passage d’un métabolisme énergétique dépendant de l’énergie solaire à un métabolisme fondé sur la combustion d’énergie fossile. / This work investigates agricultural systems from the angle of nitrogen (N), phosphorus (P) and carbon (C) fluxes in French regions from 1852 to 2014, following a socio-metabolic approach stressing out the underlying logic behind these material fluxes. Results brought out by this research highlight the systemic relation between production pattern and N and P balances, and changes in soil organic C stocks in agricultural soil. Intensive specialized agricultural systems generate high environmental losses and resource consumption per unit agricultural surface and present largely open nutrient cycles due to substantial trade flows. Conversely, integrated crop and livestock farming have more limited N and P consumption and lead to lower air and water contamination. Long-term analysis shows that only after the Second World War, under the pressure of strong interventionist policies, some French regions specialized into crop or livestock farming. Particularly, the period from the 1950’s to the 1980’s was marked by a concomitant acceleration in crops yields, livestock production and use of mineral fertilizers. This resulted in increased N and P balances over cropland and grassland and growing C inputs to cropland, causing important losses of N to the hydrosphere and atmosphere, together with the accumulation of P and C stocks in soils. However, C accumulation resulting from increased crop production was permitted by the increased recourse to mineral fertilizers and agricultural machinery which consumes fossil-fuel energy. Therefore, C storage in cropland was a side-effect of the shift from an energy metabolism based on solar energy to one based on fossil-fuel combustion.
14

Small-scale mango farmers, transaction costs and changing agro-food markets: evidence from Vhembe and Mopani districts, Limpopo Province

Aphane, Mogau Marvin January 2011 (has links)
<p>The main objective of this study was to identify ways in which transaction costs can be lowered to improve small-scale farmers&rsquo / participation in and returns from agricultural output markets, with specific reference to small-scale mango farmers in Limpopo province. This study hypothesizes that transaction costs are lower in informal spot markets and increase when small-scale farmers sell in more structured markets (formal markets). This study builds on transaction cost economics (TCE) to demonstrate how to overcome transaction cost barriers that small-scale mango farmers face in the agro-food markets. The approach to collect primary information was sequenced in two steps: first, key informant and focus group interviews were conducted and, secondly, a structured survey instrument was administered in two districts of Limpopo. A total of 235 smallscale mango farmers were interviewed. A binary logistic regression model was used to estimate the impact of transaction costs on the likelihood of households&rsquo / participation in formal (=1) and informal (=0) agro-food markets. STATA Version 10 was used to analyse the data. This study found that a larger proportion of male than female farming households reported participation in the formal markets, suggesting deep-seated gender differentiation in market participation. The average age of small farmers participating in formal markets is 52, compared to 44 for those in informal markets, implying that older farmers might have established stronger networks and acquired experience over a longer period. Farmers staying very far from the densely populated towns (more than 50 km) participate less in the formal markets than those staying closer (0 &ndash / 25 km and 26 &ndash / 49 km), which implies that the further they are from the towns, the less the likelihood of farmers selling in the formal markets. Farmers who own storage facilities and a bakkie (transportation means) participate more in formal markets compared to those who do not own these assets, which suggests that these farmers are able to store mangoes, retaining their freshness and subsequently delivering them to various agro-food markets on time. Households that participate in formal markets have high mean values of income and social grants. However, this study found that the likelihood of a household&rsquo / s participation in the markets is less as income and social grants increase. This suggests that households do not invest their financial assets in order to overcome market access barriers. A large proportion of households that own larger pieces of arable land participate in the formal markets, which implies that they are able to produce marketable surplus. Households that have a high mean value (in Rand) of cattle participate more in formal markets than in informal markets. However, this study found that the likelihood of a household&rsquo / s participation in the markets does not change with an increase in the value of its livestock. These findings suggest that households do not sell their cattle in order to overcome market access barriers. Reduced transaction costs for small-scale mango farmers in Limpopo should improve their participation in and returns from the agro-food markets. Policy interventions to support this need to focus on: access to storage and transportation facilities, enforcement of gender equity requirements in existing policies, and better access to information about markets.</p>
15

Small-scale mango farmers, transaction costs and changing agro-food markets: evidence from Vhembe and Mopani districts, Limpopo Province

Aphane, Mogau Marvin January 2011 (has links)
<p>The main objective of this study was to identify ways in which transaction costs can be lowered to improve small-scale farmers&rsquo / participation in and returns from agricultural output markets, with specific reference to small-scale mango farmers in Limpopo province. This study hypothesizes that transaction costs are lower in informal spot markets and increase when small-scale farmers sell in more structured markets (formal markets). This study builds on transaction cost economics (TCE) to demonstrate how to overcome transaction cost barriers that small-scale mango farmers face in the agro-food markets. The approach to collect primary information was sequenced in two steps: first, key informant and focus group interviews were conducted and, secondly, a structured survey instrument was administered in two districts of Limpopo. A total of 235 smallscale mango farmers were interviewed. A binary logistic regression model was used to estimate the impact of transaction costs on the likelihood of households&rsquo / participation in formal (=1) and informal (=0) agro-food markets. STATA Version 10 was used to analyse the data. This study found that a larger proportion of male than female farming households reported participation in the formal markets, suggesting deep-seated gender differentiation in market participation. The average age of small farmers participating in formal markets is 52, compared to 44 for those in informal markets, implying that older farmers might have established stronger networks and acquired experience over a longer period. Farmers staying very far from the densely populated towns (more than 50 km) participate less in the formal markets than those staying closer (0 &ndash / 25 km and 26 &ndash / 49 km), which implies that the further they are from the towns, the less the likelihood of farmers selling in the formal markets. Farmers who own storage facilities and a bakkie (transportation means) participate more in formal markets compared to those who do not own these assets, which suggests that these farmers are able to store mangoes, retaining their freshness and subsequently delivering them to various agro-food markets on time. Households that participate in formal markets have high mean values of income and social grants. However, this study found that the likelihood of a household&rsquo / s participation in the markets is less as income and social grants increase. This suggests that households do not invest their financial assets in order to overcome market access barriers. A large proportion of households that own larger pieces of arable land participate in the formal markets, which implies that they are able to produce marketable surplus. Households that have a high mean value (in Rand) of cattle participate more in formal markets than in informal markets. However, this study found that the likelihood of a household&rsquo / s participation in the markets does not change with an increase in the value of its livestock. These findings suggest that households do not sell their cattle in order to overcome market access barriers. Reduced transaction costs for small-scale mango farmers in Limpopo should improve their participation in and returns from the agro-food markets. Policy interventions to support this need to focus on: access to storage and transportation facilities, enforcement of gender equity requirements in existing policies, and better access to information about markets.</p>
16

Effet du parasitisme gastro-intestinal et de l'alimentation chez les petits ruminants en croissance : production de viande caprine en conditions d'élevage locales. / Effects of gastrointestinal parasitism and diet in small growing ruminants : production of goat meat in local livestock containers.

Ceï, Willy 28 June 2017 (has links)
Selon les nouvelles orientations agroécologiques qui s’imposent largement, il convient d’élaborer des systèmes d’élevage adaptés aux contraintes environnementales, efficients et pourvoyeurs de services écosystémiques bénéfiques pour l’environnement et la société. La question se pose singulièrement dans nos territoires antillais et ceci dans le cadre d’une demande pressante en produits carnés de qualité et à forte valeur patrimoniale comme l’est la viande caprine en Guadeloupe. Les petits ruminants, principalement élevés au pâturage, sont exposés aux infestations par les nématodes gastro-intestinaux (NGI) qui constituent une cause majeure de morbidité et de mortalité. Le déploiement de techniques adaptées et applicables sur le terrain s’avère nécessaire. Aussi des méthodes de gestion intégrée du parasitisme sont préconisées parmi lesquelles sont étudiées les stratégies d’alimentation des animaux. Il convient d’améliorer la capacité de l’animal hôte à tolérer les effets négatifs (résilience) ou à contrôler les infestations par les NGI (résistance) par la complémentation alimentaire. L’objectif de cette thèse était de définir des stratégies de complémentations des chevreaux en croissance, stade physiologique le plus touché par les NGI et dont les performances zootechniques conditionnent directement le revenu des producteurs (la production de viande).L’apport de la complémentation a été combinée à une série de recommandations de la gestion intégrée du parasitisme (voie génétique, méthode Famacha ®) et singulièrement à une stratégie de gestion du pâturage mixte avec des génisses. Ont été obtenus, un accroissement des résultats zootechniques (croissance et carcasse), de la note d’état corporel ainsi qu’une amélioration de la réponse physiologique (taux d’hématocrite). Une diminution du nombre de traitements anthelmintiques est observée aussi. Cet essai a abordé l’opérationnalité de la complémentation pour un éleveur. D’une façon générale, ce travail a ouvert aussi des questionnements scientifiques sur l’interaction nutrition*parasitisme avec un focus sur la nutrition azotée à déconnecter de l’alimentation énergétique. / New agroecological guidelines are needed around the world to develop livestock systems that are adapted to the environmental, efficient and environmentally and socially beneficial ecosystem services requirements. The question arises singularly in our Caribbean territories and this in the context of an urgent demand in meat products of quality and ofhigh patrimonial value as is the goat meat in Guadeloupe. Small ruminants, mainly grazed, are exposed to gastrointestinal nematode (NGI) infestations, which are a major cause of morbidity and mortality. The deployment of adapted and applicable techniques in the field is necessary. Therefore, methods of integrated management of parasitism are recommended among which are studied the strategies of feeding of the animals. The ability of the host animal to tolerate adverse effects (resilience) or to control infestations by NGI (resistance) should be enhanced by food supplementation. The objective of this thesis was to define supplementation strategies for growing kidneys, the physiological stage most affected by NGI and whose zootechnical performances directly affect the incarne of producers (meat production).Discussions focus on the development of targeted complementing strategies and attempt to answer questions: how to complement? (ln energy, nitrogen or both); When to complement? (Delay effects or effects during an established infestation). lt was also a question oftesting the life-size recommendations and on several variables (physio­pathological responses and zootechnical responses including carcass characteristics). In this sense this work has presented a certain originality. There was no statistically significant effect on carcass quality, however, in carcass­infected animals the carcasses were more degraded, especially with a low-protein diet. The complementation contribution was combined with a series of recommendations of integrated management of parasitism (genetic pathway, famacha method) and particularly a management strategy of mixed grazing with heifers. An increase in the zootechnical results (growth and carcass), body condition score and an improvement in physiological response, hematocrit) were obtained. A decrease in the number of anthelmintic treatments is also observed. This trial addressed the operationality of complementation for a breeder. In general, this work also opened up scientific questions about the interaction nutrition * parasitism with a focus on nitrogen nutrition to disconnect from the energy suooly
17

Small-scale mango farmers, transaction costs and changing agro-food markets: evidence from Vhembe and Mopani districts, Limpopo Province

Aphane, Mogau Marvin January 2011 (has links)
Magister Economicae - MEcon / The main objective of this study was to identify ways in which transaction costs can be lowered to improve small-scale farmers’ participation in and returns from agricultural output markets, with specific reference to small-scale mango farmers in Limpopo province. This study hypothesizes that transaction costs are lower in informal spot markets and increase when small-scale farmers sell in more structured markets (formal markets). This study builds on transaction cost economics (TCE) to demonstrate how to overcome transaction cost barriers that small-scale mango farmers face in the agro-food markets. The approach to collect primary information was sequenced in two steps: first, key informant and focus group interviews were conducted and, secondly, a structured survey instrument was administered in two districts of Limpopo. A total of 235 smallscale mango farmers were interviewed. A binary logistic regression model was used to estimate the impact of transaction costs on the likelihood of households’ participation in formal (=1) and informal (=0) agro-food markets. STATA Version 10 was used to analyse the data. This study found that a larger proportion of male than female farming households reported participation in the formal markets, suggesting deep-seated gender differentiation in market participation. The average age of small farmers participating in formal markets is 52, compared to 44 for those in informal markets, implying that older farmers might have established stronger networks and acquired experience over a longer period. Farmers staying very far from the densely populated towns (more than 50 km) participate less in the formal markets than those staying closer (0 – 25 km and 26 – 49 km), which implies that the further they are from the towns, the less the likelihood of farmers selling in the formal markets. Farmers who own storage facilities and a bakkie (transportation means) participate more in formal markets compared to those who do not own these assets, which suggests that these farmers are able to store mangoes, retaining their freshness and subsequently delivering them to various agro-food markets on time. Households that participate in formal markets have high mean values of income and social grants. However, this study found that the likelihood of a household’s participation in the markets is less as income and social grants increase. This suggests that households do not invest their financial assets in order to overcome market access barriers. A large proportion of households that own larger pieces of arable land participate in the formal markets, which implies that they are able to produce marketable surplus. Households that have a high mean value (in Rand) of cattle participate more in formal markets than in informal markets. However, this study found that the likelihood of a household’s participation in the markets does not change with an increase in the value of its livestock. These findings suggest that households do not sell their cattle in order to overcome market access barriers. Reduced transaction costs for small-scale mango farmers in Limpopo should improve their participation in and returns from the agro-food markets. Policy interventions to support this need to focus on: access to storage and transportation facilities, enforcement of gender equity requirements in existing policies, and better access to information about markets. / South Africa
18

Sustainable transitions in the Swedish agro-food sector : The case of the (the future) innovation system around Swedish legumes for protein-rich plant-based food

Tarikere Sudarshan, Prajwal, Ramesh, Srikanth January 2022 (has links)
Background: The agro-food sector faces several sustainability challenges and is in clear need of transitions to become more sustainable. A transition in food production, consumption and supply chains that demand fewer resources and fewer animal products is required to attain sustainability in the agro-food sector. This transition can be done by consuming more plant-based food and providing an alternate option to animal protein by substituting it with plant protein. Purpose: This study aims to understand the technological innovation system shaping around the value chain of Swedish legumes. To investigate the above aim, this research intends to address the following questions: RQ1: How is the innovation system built up, and how do the functions of the innovation system perform around the value chain of Swedish legumes? RQ2: What are the barriers connected to the innovation system that hinders the development of the value chain of Swedish legumes? Method: The methodology used was a qualitative case study with an abductive approach. The data was collected from 8 semi-structured interviews and a literature review of relevant articles. The empirical findings were then analysed using a framework based on Technology Innovation System (TIS). Implications: This research study describes the structural causes that form functional barriers in the innovation system that hinders the development of a value chain for Swedish legumes. The findings of this study provides an excellent opportunity for government agencies and policymakers to guide plans and actions through policies to provide incentives for farmers and research projects in favour of a sustainable transition towards more plant-based food. Also, our study contributes to an understanding of sustainability transitions in the Swedish agro-food sector by analysing how the TIS functions perform around the value chain of Swedish legumes.
19

Un'analisi dell'attività di design nel contesto dell'industria agro-alimentare in Italia tra innovazione ed estetica / An analysis of the design activity in the context of the agro-food industry in Italy between innovation and aesthetics

D'IPPOLITO, BEATRICE 24 February 2011 (has links)
La tesi si prepone di analizzare il significato di design nel contesto dell’industria agro-alimentare in Italia, con particolare riferimento alle teorie dell’innovazione tramite servizi (Miles et al., 1995; Tether et al., 2001). Precedenti studi sulla professionalizzazione di una disciplina hanno supportato una prima fase di ricerca, durante la quale si è cercato di valutare se si sta sviluppando una disciplina del design agro-alimentare (Hodgson, 2002). Successivamente, la ricerca ha analizzato come le imprese del settore abbiano sviluppato ed integrato specifiche competenze mirate a fare del design uno strumento di crescita innovativa (Jennings e Wood, 1994, Meroni, 2000, Miele e Murdoch, 2002). La metodologia si basa su casi studio tratti da dati di fonte primaria e secondaria. Un primo risultato ha evidenziato l’importanza dell’innovazione di tipo organizzativo, in particolare il lavoro di progetto ed un rapporto frequente con il cliente. Lo studio enfatizza inoltre che le aziende agro-alimentari debbano considerare aspetti legati all’innovazione in concomitanza a quelli legati all’estetica. Nei casi in cui il prodotto non rappresenti l'unica interfaccia col cliente (es. settore vinicolo), la ricerca suggerisce che la funzione di servizio del design emerge come preminente. / This thesis unveils the meaning of design in the context of the agro-food industry in Italy from a service innovation perspective (Miles et al., 1995; Tether et al., 2001). Different theoretical underpinnings have been called: previous studies on the professionalisation of a discipline have helped to assess the extent to which a discipline of agro-food design is emerging (Hodgson, 2002). Additional insight is provided by the analysis of firms and sectors that have integrated design-related expertise into their activities and, consequently, contributed to further our understanding on this matter (Jennings and Wood, 1994, Meroni, 2000, Miele and Murdoch, 2002). A qualitative approach has combined both primary- and secondary-source data. The study indicates that organisational innovations are crucial for the competitiveness of Italian design firms, project-based activity and close relationship with client firms in particular. Case studies on medium and large agro-food firms point to a blurring line between design and marketing. The study emphasises that both the innovation and aesthetic components must be considered. In cases where the product is not the only interface with the client (e.g. winemaking sector), the research suggests that the service trait of the design activity is becoming increasingly relevant.
20

Strategies for Preventing and Mitigating the Effects of Agro-food Supply Chain Disruptions

Muzvondiwa, Everjoyce 01 January 2017 (has links)
Supply chain disruptions are detrimental to the performance of companies due to the associated loss of profitability and reduced sustainability. In 2016, organizations lost at least $1.2 million in a single supply chain disruption. Guided by the contingency theory of fit, the purpose of this exploratory multiple case study was to explore the strategies agribusiness managers use to prevent and mitigate the effects of disruptions in the agro-food supply chains. A total of 5 purposefully-selected agribusiness managers from Harare, Zimbabwe participated in semistructured interviews. Participants were senior agribusiness managers who implemented successful strategies for preventing and mitigating the effects of disruptions in agro-food supply chains. Three themes emerged from the thematic analysis of interview data and review of organizational documents: collaboration among supply chain partners, business continuity management, and the use of a multiple supplier base. Agribusiness managers must first understand the sources of disruption risk, assess the impact of the risk, and then select an appropriate strategy based on the level of uncertainty and risk. By managing the risks effectively, managers can improve the performance and competitiveness of their businesses. The implications for positive social change may include a reduction in supply chain costs, provision of better services and products to consumers, and lower prices of agro-food products to consumers which could lead to an improvement in the lives of consumers.

Page generated in 0.0354 seconds