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Dissertations / Theses on the topic 'Cash Crop'

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Published: 4 June 2021
Last updated: 14 March 2023

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1

Åström, Petter. "Cash crops vs food crops : A case study of household's crop choices in Babati District." Thesis, Södertörn University College, School of Life Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-2605.

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According to earlier research farmer's crop orientation in developing countries mainly depends on farm size, large-scale farmers prefer cash crop while small-scale farmers prefer subsistence crops. The first aim of this study is to see if this hypothesis can be applied on six households in Babati District in rural Tanzania. The second aim is to investigate if other factors than farm size affect crop portfolio choice and the final aim is to see if those crop portfolio models can be improved. A case-study research design and qualitative interviews are used. The primary data is based on a fieldwork that took place from the 18th of February until the 7th of March 2009 in the study area.

From a theoretical perspective the underlying assumptions of the Marcel Fafchamp's model Crop portfolio choice under multivariate risks is discussed in connection to the result of the study.

Interviews were made with six households of different farm size. The result of the study indicates that both small-scale and large-scale farmers are using cash crops. The fact that all crops can be used for selling, gives also small-scale farmers in season with higher prices, an opportunity to sell a large share of their crops. It's thereby not possible to state that large-scale farmers devote a larger share of their land for cash crop than small-scale farmers do.

 

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2

Ödegaard, Knut. "Cash crop versus food crop production in Tanzania an assessment of the major post-colonial trends /." Lund : [Dept. of Economics, University of Lund], 1985. http://catalog.hathitrust.org/api/volumes/oclc/18958128.html.

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3

Tungittiplakorn, Waranoot. "Highland cash crop development and biodiversity conservation : the Hmong in Northern Thailand." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0027/NQ36650.pdf.

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4

Santos, James Pimentel. "The utilization of EIA techniques in food and cash crop systems of Brazil." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315376.

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5

Moe, Swe Yee. "ミャンマー、ドライゾーンにおける作付体系動態の解析." Kyoto University, 2015. http://hdl.handle.net/2433/199536.

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6

Moe, Swe Yee. "Analysis of Dynamics of Cropping Systems in the Dry Zone, Myanmar." Kyoto University, 2015. http://hdl.handle.net/2433/199368.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第19044号
農博第2122号
新制||農||1032(附属図書館)
学位論文||H27||N4926(農学部図書室)
31995
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 縄田 栄治, 教授 舟川 晋也, 教授 白岩 立彦
学位規則第4条第1項該当
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7

An, Ning. "The economic impact of climate change on cash crop farms in Québec and Ontario." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123262.

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This study estimated the economic impact of climate change on representative cash crop farms at selected sites in Québec and Ontario over the period 2010 to 2039 using a Mixed Integer Dynamic Linear Programming Model. Five climate scenarios (Hot & Dry, Hot & Humid, Median, Cold & Dry and Cold & Humid) and four weather conditions (the combination of with and without Carbon Dioxide (CO2) enhancement and water limitation) were selected and combined to form 20 different scenarios. Four major cash crops, i.e. corn, soybean, wheat, and barley, were considered using both reference and improved cultivars. Historical data on crop yields were used to validate the Decision Support System for Agro-Technology Transfer (DSSAT) model which was used to project future yields. Economic variables, such as cost of production and crop prices were projected using Monte Carlo simulation with Crystal Ball Predictor. The results indicate that the optimal resource allocation, outputs, net returns, economic vulnerability, and adaptation strategies were dependent on the climate scenarios, weather conditions, types of crop and variety, as well as site. Water accessibility plays an essential role in farm profitability, especially coupled with atmospheric CO2 enhancement. Producers at all sites and scenarios were worse off under unfavorable weather condition when water was limited and CO2 enhancement was absent, especially in Ste-Martine where producers were predicted to have a number of years with successive financial losses. Different climate scenarios also had different impacts on farm management. The representative farm in Ste-Martine performs best under the Hot & Dry scenario if water was adequate, while in North Dundas, the Median or Cold scenarios were preferred. Technological development decreased farm financial vulnerability for all sites and scenarios. Institutional development, in terms of insurance programs and risk management tools, were also used to improve resilience.
Cette recherche mesure les impacts économiques des changements climatiques sur les principales grandes cultures produites au Québec. Pour ce faire, la recherche utilise un modèle d'optimisation linéaire dynamique unitaire mixte sur la période 2010-2039. Cinq scénarios climatiques (chaud et sec, chaud et humide, médian, froid et sec et froid et humides) ont été combinés à quatre conditions atmosphériques (avec et sans augmentation du CO2 et avec et sans diminution de la disponibilité de l'eau) ont été sélectionnés pour créer un total de 20 scénarios possibles. Quatre grandes cultures majeures (Maïs, soya, blé et orge) ont été considérées en utilisant un rendement de référence et un scénario d'amélioration des cultivars. Les données historiques sur le rendement des cultures ont été utilisées pour valider le Système de Support de Décision pour le Transfert Agro-Technologique (SSDTAT) qui estime le rendement futur. Les variables économiques comme le coût de production et le prix des grains ont été basés sur une simulation Monte Carlo avec un prédicteur boule de cristal. Les résultats indiquent que l'allocation optimale des ressources, des produits, des bénéfices nets, de la vulnérabilité et de la stratégie d'adaptation étaient dépendants du scenario de climat, des conditions atmosphériques, du type de cultures, de l'amélioration des variétés ainsi que du site. L'accessibilité de l'eau joue un rôle essentiel sur la profitabilité, tout spécialement lorsqu'elle est combinée à une augmentation du CO2 atmosphérique. Les producteurs de tous les sites et de tous les scénarios étaient désavantagés face à des conditions climatiques défavorables où l'eau était limitée et l'augmentation du CO2 absent. Cette situation s'est avérée très bien représentée au site de Ste-Martine où les estimations concluaient que les producteurs subissaient des pertes financières successives sous ce scénario. Les différents scenarios climatiques peuvent également avoir des impacts différents sur la gestion des entreprisses agricoles. Ainsi, les fermes sondées du site de Ste-Martine ont mieux performé sous le scénario chaud et sec et lorsque l'eau était adéquate. Par contre, le site de Dundas Nord s'est avéré plus productif sous le climat froid ou médian. De plus, l'amélioration technologique, c'est-à-dire l'amélioration des cultivars, peut diminuer la vulnérabilité des entreprises et en augmenter la résilience pour tous les sites, scénarios, conditions climatiques et cultures. Le développement institutionnel comme des programmes d'assurance récolte ou des outils de gestion du risque peuvent également être utilisés pour diminuer la vulnérabilité financière et ainsi augmenter la résilience des fermes sondées.
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8

Amrouk, El Mamoun [Verfasser]. "Price dynamics and interaction of international cash crop and staple food markets / El Mamoun Amrouk." Bonn : Universitäts- und Landesbibliothek Bonn, 2021. http://d-nb.info/1230878602/34.

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9

Afolabi, Monsurat Mojirayo. "Commercialization of agriculture in Nigeria : a gender analysis of cash crop production in Yekemi, Osun State." Thesis, University of Hull, 2015. http://hydra.hull.ac.uk/resources/hull:14598.

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The commercialization of agriculture is seen as a cornerstone of processes of development and modernisation and the incorporation of rural farmers into this economy shows their importance as a major pillar in the economy. In Nigeria, cash crop production is highly significant for farmers in terms of raising their income and improving their economic status. It tends to be the case that within Nigerian contexts, broadly speaking, there continues to exist patriarchal forms of social organization and normative gender relations. In Yorubaland, even though the word ‘farmer’ as a term for involvement in agriculture is gender-neutral, the societal job demarcations, coupled with cultural expectations, makes the word ‘farmer’ become synonymous with ‘male’ and women are seen as farmers’ wives. Little attention or recognition is paid to women farmers within agricultural production and their economic contribution to national economies through commercial agriculture, with little or no gender-segregated data on agricultural outputs. This thesis examines the impact of women’s involvement in the commercialization of cash crop production on gender relations at inter and intra household levels, focusing on Yekemi. It examines the effects of men migrating from Yekemi on cash crop production; the phenomenon of a shift in gender roles in the Yekemi community; the causative factors; the reactions of men to the shift; and the future prospects and lessons of the shift. An ethnographic approach was used, involving observations, interviews, visitations, walking the land and focus group discussions to gather detailed data about the change in status quo in gendered power relations. This study reveals the power dynamics associated with female cash crop farmers. It shows that Yekemi, though a traditional rural setting, has overcome some of these traditional gender divisions and gender segregation in agricultural labour. I discovered that women in Yekemi empower themselves through their involvement in agricultural commercialization of cash crop production, which incurs recognition of their status as farmers in the village and ability to exercise agency in decision making within their households. From the findings the thesis concludes that if participation in agricultural commercialization could be responsible for sustained economic independence and shifts in gender power dynamics beyond traditional norms in Yekemi, this could be seen as a critical example for use elsewhere. It could have significant implications for other female farmers and help to develop ways to empower rural women to gain a more visible and recognized foothold within commercial agriculture.
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10

Kawamura, Masahiro. "High value cash crop farming as a livelihood strategy in mountain agriculture : A case study of cardamom farming in eastern Nepal." Thesis, University of East Anglia, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520449.

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11

Köcke, Sebastian. "The Perception of Cassava in Malawi : A Literature Study About a Root Crop’s Implication on Food Security in the Past and the Present." Thesis, Uppsala universitet, Institutionen för arkeologi och antik historia, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-401859.

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Climate change and weather phenomena like the El Niño-La Niña Southern Oscillation aremaking agriculture increasingly vulnerable in the Global South. In Malawi, where morethan 90% of the agriculture is rain-fed, food insecurity is becoming an annual problem. Inthe past, governmental policies have focused on improving maize production, which has ledinto mono-culture and a dependency on this crop resulting in acceleration of food insecurity.To fight hunger, non-governmental organisations and international donors are now focusingon promoting cassava due to its low-input requirements and drought resistance. Althoughcassava is marketed as somewhat of ’a new discovery’ in Malawi, the root crop has beencultivated in the country for nearly as long as maize. This thesis explores the historicalecology of cassava in Malawi and its involvement in historical food crises, where it wasused as a famine crop. Nowadays, cassava is mostly promoted as a cash crop but variousconstraints are still in the way of cassava production and processing which will be examinedin this thesis. Furthermore, the thesis explores the eects of agricultural policies on cassavaand the ways in which non-governmental organisations are promoting cassava. It will alsobe shown that the perception of cassava is not unison in Malawi and that the promotionof cassava should be adapted to the specific local situations. Additionally, based on thehistorical and current experience of cassava cultivation in Malawi, the possible eectsof an increased cassava cultivation and processing on food security will be discussed, inparticular based on the three dimensions of food security: food availability, food access andfood use.
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12

Chetvertakov, Sergey [Verfasser], Folkhard [Akademischer Betreuer] Isermeyer, Ludwig [Gutachter] Theuvsen, and Bernhard [Gutachter] Brümmer. "Prospects of cash crop production in CBSR of Russia / Sergey Chetvertakov ; Gutachter: Ludwig Theuvsen, Bernhard Brümmer ; Betreuer: Folkhard Isermeyer." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1142001423/34.

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13

Chetvertakov, Sergey Verfasser], Folkhard [Akademischer Betreuer] [Isermeyer, Ludwig [Gutachter] Theuvsen, and Bernhard [Gutachter] Brümmer. "Prospects of cash crop production in CBSR of Russia / Sergey Chetvertakov ; Gutachter: Ludwig Theuvsen, Bernhard Brümmer ; Betreuer: Folkhard Isermeyer." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://nbn-resolving.de/urn:nbn:de:gbv:7-11858/00-1735-0000-0023-3F30-C-7.

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14

Balole, Thabsile Virginia. "Strategies to improve yield and quality of sweet sorghum as a cash crop for small scale farmers in Botswana." Diss., Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-05032002-082332.

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15

Kameda, Chika. "Factors Influencing the Changes of Swidden Agriculture and Its Development in Rural Livelihoods of Northern Laos." Kyoto University, 2015. http://hdl.handle.net/2433/202730.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第19325号
農博第2146号
新制||農||1036(附属図書館)
学位論文||H28||N4953(農学部図書室)
32327
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 縄田 栄治, 教授 舟川 晋也, 教授 神﨑 護
学位規則第4条第1項該当
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16

Jauch, Rainer. "How to Achieve Sustainability in Cash Crop Markets that is in line with Market Requirements - An Assessment of the Cocoa Industry." St. Gallen, 2008. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/05605142001/$FILE/05605142001.pdf.

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17

FALSETTI, BENEDETTA. "Economic implications of food-related virtual water trade." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2962969.

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18

Filipsson, Svante, and Anders Hultman. "Is smoking and clothing doing any good for Mozambique : a study of cashcrops and its effects in northern Mozambique." Thesis, Växjö University, School of Social Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1718.

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The question of the cultivation of cash crops in Africa south of Sahara has long been debated. We have examined the situation of cash crop cultivation for the peasant of northern Mozambique. What factors are needed for a peasant to be able to choose to cultivate cash crops and what are the effects on the peasant’s situation when cultivating cash crops? With help from James C. Scott’s theories about food security and the safety first principle see how the possibilities are for the peasant to grow cash crops.

By using the Lewis two-sector model we have examined the possibilities for a peasant of northern Mozambique abilities to make the transition from the agricultural sector to the industrial sector. We found this model insufficient to explain the transition of labour in the Mozambican society. The model needs two additional sectors to fully explain the transition in Mozambique. These sectors, cash crop and semi-industrial, are needed because the transition is too far in terms of productivity and technology. An extensive cash crop production is therefore important for the economic development. We have also found that food security is important for the peasants in order to start growing cash crops.

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19

Fitzpatrick, Ian C. "Cardamom, class and change in a Limbu village in east Nepal." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:7d34c774-84c7-4b91-bb96-0e89d2056af8.

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This thesis investigates the history of economic differentiation in a Limbu village in east Nepal. By examining three historically overlapping productive processes - subsistence agriculture, cash crop cardamom cultivation, and international migration - this thesis shows how each productive process has contributed in different ways to the acceleration of economic differentiation. In particular this thesis focuses on cardamom cultivation which first provided a means to transform significantly the lives of a large section of Limbu society. Introduced into the village by a local inhabitant in 1968, and thereafter spread throughout the whole Kabeli river valley and beyond, the cardamom plant has given many households access to considerable cash. This has enabled some households to purchase property in the plains, send their children to English-medium private schools, and send sons abroad for work. Households with little or no cardamom however, have fallen into increasing indebtedness, losing access to land and becoming increasingly dependent on wage labour for survival. The thesis also discusses international labour migration, which has more recently become another important and lucrative productive process for a certain proportion of the village. This has resulted in the rapid growth of a dispersed village in Jhapa in the plains, which has become a hub for international migrants as well as a symbol of the hopes and aspirations of villagers. This has brought about yet further economic differentiation between households that have been able to finance visas for work abroad, and those that continue to struggle day to day. Despite the increased integration of the village with a national and global market, the continued existence of Limbu language and cultural practises emphasizes the active role villagers have played in shaping their current condition.
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20

Mercio, Thomaz Zara. "Análise econômica e de risco de sistemas integrados de produção agropecuária e de bovinocultura de corte." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/163261.

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O objetivo do trabalho foi realizar uma análise econômica e de risco em sistemas integrados de produção agropecuária (SIPA) e de bovinos de corte de ciclo completo na Campanha Meridional do Rio Grande do Sul, região sul do Brasil, por um modelo de simulação. O modelo foi desenvolvido e operado em planilhas dinâmicas do Microsoft Excel®. O trabalho foi dividido em duas etapas, na primeira, foi realizada uma identificação e análise dos riscos existentes na produção de bovinos de corte e SIPA. Na segunda, foi realizada uma análise econômica e uma avaliação dos riscos de três sistemas de produção. Como resultado da primeira etapa, os principais fatores de risco na bovinocultura foram, condições climáticas, custo de produção, capacidade de investimento e gestão da propriedade. Na SIPA foram identificados novos ricos, como a produtividade da soja (Glycine max) e desconhecimento da atividade. No entanto, do total dos riscos considerados mais importantes, metade deles estão presentes nas duas atividades. Na segunda etapa, foram estabelecidos três sistemas de produção, bovinocultura de corte de ciclo completo (SBC), bovinocultura de corte de ciclo completo associado com leasing de uma área para soja (SLS) e bovinocultura de corte de ciclo completo com o cultivo de soja pelo próprio pecuarista (SCS). O sistema que apresentou maior margem bruta foi o SLS (R$ 223,57/ha) comparado aos outros dois sistemas (SBC: R$ 138,11/ha; SCS: R$ 149,62/ha). O SCS apresentou o maior risco entre os sistemas, devido a maior amplitude de resultados na margem bruta. A produtividade média da pecuária foi similar nos sistemas SBC e SLS (129,55 e 131,74 kg PV/ha/ano). Com exceção da produtividade da soja que foi o principal risco no SBS, todos os outros estiveram ligados as fontes de risco de mercado. Conclui-se que os produtores rurais percebem o SIPA com maior risco do que a bovinocultura. Em ambos os casos, o risco de produção é o que apresenta o maior número de fatores com alto risco de ocorrência e, portanto, deve receber especial atenção pelos produtores rurais. O que foi consolidado quando se concluiu que o melhor sistema foi o SLS por apresentar melhor margem bruta e menor risco que o SCS, e este último foi o que apresentou o maior risco, no entanto, os riscos que mais influenciaram a variação da margem bruta foram os de mercado e não os de produção.
The aim of this study was compare the economic and risk analysis on an integrated crop-livestock (ICLS) and a cycle complete beef cattle systems in the Campanha Meridional of Rio Grande do Sul, Brazilian Southern Region, through a simulation model. The simulation model was developed and operated through Microsoft Excel® dynamic worksheets. The research was divided in two stages, in the first, an identification and analysis of the existing risks in the production of beef cattle and ICLS was carried out. In the second, an economic and risk analysis of the three production systems. Because of the first stage, the main risk factors in beef cattle farming were climatic conditions, production cost, investment capacity and farm management. In the ICLS there were changes such as soybean yield (Glycine max) and lack of knowledge of the activity. However, of the total risks considered most important, half of them were present in both activities. In the second stage, three production systems were established, cycle complete beef cattle (SBC), cycle compete beef cattle associated with leasing of a soybean area (SLS) and cycle compete beef cattle with the cultivation of soybean by the owner (SCS). The system with the highest gross margin was SLS (R$ 223.57/ha) compared to the other two systems (SBC: R$ 138.11/ha; SCS: R$ 149.62/ha). The SCS presented the highest risk among the systems, due to the greater range of gross margins. The average productivity of livestock was similar in the SBC and SLS systems (129.55 and 131.74 kg PV/ha/year). Except for soybean yield that were the main risk at SCS, all others were linked to market risk sources. It is concluded that farmers perceive the SIPA with greater risk than beef cattle systems. In both cases, production risks are the one that presents the highest number of factors with high risk of occurrence and, therefore, should receive special attention. This was consolidated when we concluded that SLS presented a better gross margin and a lower risk than the SBC, and the latter was the one that presented the highest risk. However, the risks that most influenced the gross margin variation were the market, not the production.
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21

Samson, Roger A. (Roger Anthony). "On-farm evaluation of cultivation, cover crops and chemical banding for crop and weed management in integrated farming systems." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55700.

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22

Campanale, Letizia. "Integrated study and modelling of the factors affecting small-scale subsistence farming in eSwatini (southern Africa) through the use of causal diagrams and agent-based models." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23940/.

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The dependence of small-scale subsistence farmers on natural resources highlighted the need of a transition towards a more sustainable management of resources. An extensive literature is available on the structural factors affecting small-scale agricultural production in developing countries, while few studies are available on the role of social dynamics on the capacity of the system to react to adverse conditions. What are then the social, economic and environmental factors affecting small-scale subsistence agriculture? and, what is the effect of social behaviours on the adoption of agricultural innovation? This study is based on the specific case of eSwatini (southern Africa). A causal loop diagram was adopted to show the cause–effect relationship between variables. The role played by social behaviors in the diffusion of innovation is explored with the use of agent-based modelling (ABM). The model is based on agents, environment, links and five processes: crop production, social learning, individual learning, decision making, and resource recovery. In the simulation three farming behaviours can be adopted: no cropping, traditional practices or conservation agriculture (CA). The ABM was implemented in the Netlogo 6.2.0 platform. The case study is supported by scientific literature and interviews with local stakeholders. The results highlight the role of gender equality in the diffusion of knowledge. The model was run with and without gender equality for 10, 25 and 50 cycles representing farming seasons. The results show an increase in the spread of CA in the scenarios with no gender discrimination for which the rate of innovation adoption is faster. Moreover, the study casts light on the role of social learning and its dependence on training and education centres for the diffusion of new behaviours. Also, results show how an increase in the number of learning centres leads to a higher rate of knowledge diffusion.
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23

Cristoiu, Adriana. "Technical efficiency in transition economies : the case of Romanian crop production." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406336.

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24

Keifer, Jarrett Alexander. "Agricultural Classification of Multi-Temporal MODIS Imagery in Northwest Argentina Using Kansas Crop Phenologies." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/2102.

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Subtropical deforestation in Latin America is thought to be driven by demand for agricultural land, particularly to grow soybeans. However, existing remote sensing methods that can differentiate crop types to verify this hypothesis require high spatial or spectral resolution data, or extensive ground truth information to develop training sites, none of which are freely available for much of the world. I developed a new method of crop classification based on the phenological signatures of crops extracted from multi-temporal MODIS vegetation indices. I tested and refined this method using the USDA Cropland Data Layer from Kansas, USA as a reference. I then applied the method to classify crop types for a study site in Pellegrini, Santiago Del Estero, Argentina. The results show that this method is unable to effectively separate summer crops in Pellegrini, but can differentiate summer crops and non-summer crops. Unmet assumptions about agricultural practices are primarily responsible for the ineffective summer crop classification, underlining the need for researchers to have a complete understanding of ground conditions when designing a remote sensing analysis.
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25

Robbins, Mike. "Can we crop carbon? : a case study in North-South climate mitigation." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443092.

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26

Bhogaraju, Prabhakar V. "A Case-Based Reasoner for Evaluating Crop Rotations in Whole-Farm Planning." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/36817.

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I have worked on a Case-Based Reasoning (CBR) system that evaluates crop rotations for their soil erosion and risk of insect pest problems. The purpose of this system is to provide decision support for an automated whole-farm planner (CROPS). CROPS (Buick et al., 1992) generates crop rotation plans that can address some of the environmental, economic and legislative pressures facing natural resource managers. To generate and recommend a crop rotation plan CROPS requires estimates on the soil erosion risks and pesticide pollution potential of the crop rotation. In this research I have designed and prototyped a system that can assist CROPS in the process of whole-farm planning by providing information required for determining the soil erosion risks and the pesticide pollution potential of crop rotations. Inputs for the system include: a crop rotation, its tillage and residue management practices, and field conditions. Soil erosion risk is quantified using the C-value. Pest risks are likelihood of pest outbreaks that require control in a crop rotation. CBR was the chosen methodology for system implementation. In CBR, solutions to new problem situations are derived from retrieving and adapting solutions to similar problem situations experienced in the past. The system was prototyped using Esteemâ ¢, a CBR development shell, and runs on a PC under the MS. Windowsâ ¢, operating system.
Master of Science
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Gauchan, Devendra. "Conserving crop genetic resources on-farm : the case of rice in Nepal." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424540.

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Alves, Helena Maria Ramos. "Quantitative land suitability evaluation using readily available data sources : a case study of maize in Minas Gerais, Brazil." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335886.

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29

Hogan, Emmett P. "Red Crow Community College, a case study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ34678.pdf.

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30

Zuhair, Segu M. M. "Harvesting behavior of perennial cash crops: a decision theoretic study." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/76322.

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This study analyzed the harvesting behavior of perennial cash-crop growers in Sri Lanka. These growers face two alternatives with respect to harvesting; premature and mature harvesting. The objectives of the study were: to determine the reasons for premature harvesting, to explain this behavior with socio-economic factors as explanatory variables, and to describe the behavior with decision theory. The first objective was achieved by surveying a sample of 240 farmers. Fear of theft and immediate money needs were the reasons why most farmers harvested their crop at a premature stage. A logit probability model was used to explain this behavior. Education of the farmer, ratio of lowland to total land operated by the farmer, and the total family income were significantly related to harvesting behavior. Expected utility theory, expected profit maximization, and a lexicographic safety-first model were used to predict farmer behavior. The expected utility approach used the exponential utility function, the quadratic utility function, and the cubic utility function. The lexicographic safety-first model minimized the probability of regret as the first objective and maximized the expected income as the second objective, in that order. The expected utility model with the exponential utility function made the largest number of correct predictions followed by the expected profit maximizing model. The conclusions of this study, while providing more evidence of the poor predictive ability of the expected profit maximizing model, further supports the usefulness of expected utility theory in describing and predicting farmer behavior. A majority of the studies on farmer behavior have concentrated on resource allocation. This study has demonstrated that even harvesting behavior can be explained by expected utility theory. There was no consistency in the way the utility functions ranked the two harvesting alternatives; for certain farmers the ranking of one function reversed the ranking of other functions. This study has, thus, demonstrated the influence of utility functional forms on the ranking of prospects. The results were sensitive to changes in the discount rate and the results of the safety-first model were sensitive to changes in the expected income.
Ph. D.
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31

Ali, A. M. "Impact and implications of new plant technology in agriculture : A case study of selected crops in Bangladesh." Thesis, University of Sussex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379468.

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32

Ozdes, Mehmet. "The effect of climate and aerosol on crop production: a case study of central Asia." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/48997.

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The effect of recent climate change in Central Asia poses a significant and potentially serious challenge to the region’s agricultural sector. An investigation of the aerosol-climate- crop yield correlation in this region is essential for a better understanding of the effect of aerosols and climate on Central Asian agriculture. Our goal is to investigate the linkages between aerosol, climate and major crop production (cotton, maize, wheat, and rice) in specified agricultural regions in the five Central Asian countries. Our approach is to perform the Pearson’s Correlation Coefficient analysis in order to observe the statistical correlation between crop yield, temperature, precipitation, and aerosol optical depth (AOD), for each indicated agricultural region in the selected countries. Besides, using NASA GIOVANNI website tools, we retrieve distribution maps and time series of temperature, precipitation and AOD to facilitate the analyses. The research shows that in some aspects, the relation between AOD, climate, and crop yield is different in Central Asia than in previous global or large scale research hypotheses. The statistical correlations vary not only across countries but also across agricultural regions. For example, in Kazakhstan, opposite correlations exist between precipitation and AOD in two different agricultural regions even though both regions are rain-fed. In the more arid countries (with lower rain rates) such as Turkmenistan and Uzbekistan, no correlation exists between crop production and temperature, precipitation, and AOD, while the less arid (with higher rain rate) countries (Kazakhstan, Kyrgyzstan, and Tajikistan) indicate a positive correlation.
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Owusu, Alex B. "Detecting and quantifying the extent of desertification and its impact in the semi-arid Sub-Saharan Africa a case study of the Upper East Region, Ghana /." Fairfax, VA : George Mason University, 2009. http://hdl.handle.net/1920/4576.

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Thesis (Ph.D.)--George Mason University, 2009.
Vita: p. 287. Thesis co-directors: Sheryl L. Beach, Guido Cervone. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Earth Systems and Geoinformation Sciences. Title from PDF t.p. (viewed Oct. 11, 2009). Includes bibliographical references (p. 267-286). Also issued in print.
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Muondo, Pascoal António. "Culturas intercalares e agricultura familiar em Angola. Caso: mandioca/cajanus; mandioca/leucaena." Doctoral thesis, ISA, 2013. http://hdl.handle.net/10400.5/6158.

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Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia
The term culture system with the incorporation of legumes at flowering between the lines of the main crop, is a novelty for Angolan agriculture when it comes to food crops in the group of roots and tubers which fits cassava and even in the case of cereals. Our work aims to: Contribute to sustainable agriculture in the areas of cassava production in Angola, as well as the transfer of technology to promote the improvement of agricultural production systems in terms of family farmers, who constitute the majority of small, medium farms and why not also in the creation of large companies, resorting to low-cost technologies and the scope of farmers, improve the productivity of this crop and the quality of final product, thereby providing better living conditions, socioeconomic and environmental practice sustainable agriculture by maintaining and improving the physical characteristics and soil fertility, using the system of crops, with the use of leguminous trees and shrubs Leucaena and Cajanus fairly disclosed in the country. The incorporation of legumes in two lines of cassava by a total of two cultural cycle of cassava a year, promoted: greater availability of soil nutrients, increased production per unit area, improved quality of tuberous roots. It also led to good correlation between the production and macro soil nutrients other than phosphorus
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35

Xiao, Ying. "Mining crop sequence patterns at a large regional scale : A case from mainland France." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0122/document.

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L’objectif principal de cette thèse est d’instruire l’organisation des successions culturales, à l’échelle de la France et sur un recul décennal, tant en terme de cinétiques localisées qu’en terme de dynamiques liées à des variables explicatives du milieu physique et socio-technico-économiques. Ce travail de « fouille de données » est appliqué en France métropolitaine, en utilisant les bases de données publiques disponibles. Notre étude couvre la période 1992-2003 où s’implémenta la réforme de 1992 de la Politique Agricole Commune européenne et l’agenda 2000 en France. A partir d’une fouille de données sur l’ensemble des points Terruti sur cette période, 2549 successions culturales de trois ans furent identifiées. Ensuite, 21 clusters de l’ensemble des 430 régions agricoles (RA) françaises, quatre systèmes de culture, 90 RA, parangons des 430 RA, et trois régions principales appartenant à cinq des 21 clusters, regroupant les cultures de céréales, oléagineux et protéagineux, ont été définis. Deux approches de cinétiques des successions ont été réalisées : Une étude envisageant les successions de culture qui suivent les retournements de prairies permanentes. Une recherche des dynamiques d’évolution de successions culturales en lien avec des conditions externes. Nous proposons une utilisation ultérieure des méthodes mobilisées qui ont montré leur capacité à cartographier les grandes tendances d’évolution en France et à identifier les principales variables explicatives de ces évolutions. Les apports de cette thèse contribuent à améliorer notre compréhension des processus qui organisent les successions culturales en France et construisent par ces pratiques agricoles très dynamiques des impacts forts sur le territoire agricole français
In the context of changing agricultural policy, the development of agricultural production systems, increasing concern for agricultural sustainability and shifts in agricultural land management practice-related land-use change, the main objective of this thesis was to mine crop sequence patterns (CSP) and the relationships between CSP and the biophysical and socio-technical-economic conditions in mainland France from historical census data (e.g. land-cover survey, agricultural censuses, population census). Our study period 1992-2003 covers the implementation period of the 1992 European Union Common Agricultural Policy reform and Agenda 2000 in France. Both the classical statistical and data mining technique were applied in alone or combined ways in this thesis. First, we proposed an innovative approach to representing CSP within a given area and period at a large regional scale in a stationary way. The 2549 3-year crop sequences (CSs) were first identified as major CSs within all 430 agricultural districts (ADs) in mainland France during this period. Next, 21 clusters of ADs , four types of cropping systems, 90 representative ADs and three principal planting zones of cereals, oilseeds, and protein crops belonging to five clusters identified previously were further defined. We then explored CSP in a dynamic way by investigating CSP after grassland-to-cropland conversion, the temporal variability of CSP, and the evolution of the relationships between CSP and the external conditions over the study period. We conclude that the approaches developed here permit the representation of CSP at the large regional scale in both stationary and dynamic ways using time series land-cover data denoting specific agricultural cover types. The findings of this thesis contribute to improving the understanding of the process and pattern of human land management practices by agriculture affecting the terrestrial biosphere
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Parkinson, Anne. "The Lost Stakeholder: A Case Study of Risk and Trust Perceptions Held by Canola Farmers in NSW and the Implications for Policy Making in the Area of Biotechnology, Environment and Agriculture." Thesis, Griffith University, 2010. http://hdl.handle.net/10072/365501.

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The endeavour to ‘redesign’ life at the molecular level has been widely characterised as controversial. Subsequently, agricultural biotechnology has rarely been out of the news in Australia and elsewhere throughout the last few decades during its development. Proponents are certain of the benefits, while critics are equally certain of the costs or hazards. Such polarisation is especially intense with regard to the introduction of genetically modified (GM) food crops. This thesis presents the findings from a survey of Australian canola farmers and their perspectives on the widescale introduction and regulation of GM food crops in Australia in relation to scientific, social, environmental and commercial risk and uncertainty. It also draws upon an analysis of GM regulation in Australia to determine how farmers have been involved in GM technology policy making...
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environmental Sciences
Faculty of Science, Environment, Engineering and Technology
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37

Champalle, Clara. "Cash crops and climate shocks: flexible livelihoods in Southeast Yunnan, China." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114509.

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The rural landscape of the People's Republic of China has changed dramatically from land collectivization in the 1950s to the decollectivization reforms initiated by Deng Xiaoping in 1979. By the mid-1980s each rural household had again become responsible for its own agricultural production, and food security began to improve, even within the most remote areas. To further this agrarian transition, in the late 1990s the central state devised the Western Development Strategy to advance its 'less developed' western regions, within which provincial governments subsidized cash crops. The aim of this thesis is first to examine the importance of cash crops and related subsidies for Han and minority nationality farmer households in Honghe Hani-Yi Autonomous Prefecture, Yunnan, China; second, to assess how extreme weather events affect these farmers' livelihoods and to investigate the coping mechanisms they employ. To answer this aim I draw on a conceptual framework that incorporates key elements from sustainable livelihoods, food security, and vulnerability and resilience to climate variability literatures. Focusing on four townships in Honghe Prefecture, southeast Yunnan, I completed statistical analyses of quantitative data regarding recent extreme weather events in the region and ethnographic fieldwork, including conversational interviews with farmers and semi-structured interviews with local officials completed in summer 2011. I find that state-sponsored cash crops do not always bring higher financial capital rewards and that cash crop farmers have been increasingly exposed to extreme precipitation and temperatures since the year 2000, which constrain their access to livelihood capitals, essential for (re)investing in cash cropping. In turn, farmers cope with and/or adapt to climate shocks according to their initial livelihood decision-making and the specifics of the event, while also being influenced by their location and ethnicity. In sum, I argue that farmers' vulnerability is rooted in social, temporal and spatial variables, many of which are not being considered by state officials.
Le paysage rural de la République Populaire de Chine s'est considérablement transformé depuis la collectivisation dans les années 50 jusqu'aux réformes de dé-collectivisation instauré par Deng Xiaoping en 1979. Au milieu des années 80, chaque ménage rural est redevenu responsable de sa propre production agricole et la sécurité alimentaire semble s'être améliorée, même dans les régions les plus reculées. Pour intensifier la transition agraire et le développement rural, l'état a commencé à la fin des années 90 à subventionner les cultures commerciales au niveau provincial, à travers sa « Stratégie de développement de l'ouest du pays ». L'objectif de ce mémoire est premièrement d'examiner l'importance des cultures commerciales subventionnées par l'état pour les agriculteurs, particulièrement issus des minorités ethniques (Yi, Hmong, Yao, et Zhuang) et de la majorité Han dans la Préfecture de Honghe, Yunnan; et deuxièmement d'évaluer les effets des phénomènes climatiques extrêmes sur leurs moyens d'existence et d'étudier les mécanismes de survie auxquels ils ont recours. Pour remplir cet objectif, j'utilise un cadre théorique incorporant les éléments clés des littératures sur les moyens d'existence durables, la sécurité alimentaire, ainsi que la vulnérabilité et la résilience à la variabilité du climat. Mes méthodes comprennent une analyse statistique des données quantitatives des récents phénomènes climatiques extrêmes dans la région et un travail ethnographique dans quatre cantons de la Préfecture de Honghe, notamment des entrevues non structurées avec les agriculteurs et semi-structurées avec les cadres locaux au cours de l'été 2011. Je constate que les cultures commerciales subventionnées par l'état ne s'accompagnent pas toujours d'une amélioration du capital financier des agriculteurs et que ces cultures sont de plus en plus exposées à de fortes précipitations et d'extrêmes températures, qui réduisent l'accès aux capitaux de subsistance, nécessaire au réinvestissement dans les cultures commerciales. Par conséquent, les agriculteurs développent des stratégies de survie et/ou d'adaptation selon leurs moyens d'existence choisis et le type de phénomènes climatiques, mais sont également affectés par leur emplacement et leur ethnicité. En somme, je remarque que l'accès des agriculteurs aux ressources est essentiellement fonction de trois variables : sociale, temporelle et spatiale ; celles-ci souvent ignorées par les cadres gouvernementaux.
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38

Heigh, Lori. "Developing a welfare measure of wildlife damage, a case study of Ontario field crop producers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61906.pdf.

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39

Mbonane, Nobuhle Duduzile. "An analysis of farmers' preferences for crop insurance : a case of maize farmers in Swaziland." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/67801.

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The uncertain nature of agricultural production makes risk management essential in providing farmers with protection against potential losses. Crop insurance is a sustainable risk management tool that ensures the sustainability of agricultural enterprises by reducing income risks. The main focus has been on the supply and penetration of crop insurance, with limited attention paid to the demand and to farmers’ preferences for crop insurance. In Swaziland, the crop insurance industry is still under-developed; hence, an empirical gap exists in knowledge of farmers’ preferences for crop insurance. This study identifies the conditions that farmers prefer to accept with regard to crop insurance, as well as the factors that influence them in purchasing it. It provides an understanding of the need of farming households for crop insurance, and seeks to identify the best ways of protecting farmers’ livelihoods from agricultural risks. It also provides an account of the effects of ineffective risk management strategies. The study employed descriptive statistics to analyse primary data: snowballing sampling methods were used to collect survey data from 150 households in the Hhohho and Lubombo regions of Swaziland. Results show that 52% of the sampled households expressed an interest in purchasing crop insurance; the other 48% were not interested in purchasing crop insurance and gave reasons for this. The probit model was used to determine the factors that influence the likelihood of farmers indicating an interest in purchasing crop insurance: these included gender, marital status, occupation, education, location, savings and farming experience. Farmers based their preferences on crop insurance features such as risk cover, coverage levels and the nature of cover, compensation and premiums. Binary logistic regressions were used to identify factors that influence farmers’ preferences regarding crop-insurance features. Respondents preferred the multi-peril crop insurance cover, higher coverage levels, lower premiums and compensation based on market price. They also wanted their coverage to include both crops and livestock, and to be involved in the designing of crop insurance programmes. A lack of farmer education regarding the purpose and benefits of crop insurance was one of the causes of farmers’ lack of interest in purchasing crop insurance. Evidence from this study indicated that farmers in the Lubombo region were more interested in crop insurance than farmers in the Hhohho region. This was predictable, considering that the more risk or uncertainty farmers face, the more likely they are to show an interest in purchasing a sustainable risk management strategy like crop insurance. Farmers are currently more responsive to crop insurance and their preferences are important in informing the ex-ante design process and finding ways of improving crop insurance programmes in Swaziland. This study recommends education for farmers on the role and benefits of crop insurance; it also suggests that the Swazi government to consider implementing crop insurance subsidies and engage with insurance providers to tailor programmes to meet the needs and constraints faced by farmers. Understanding farmers’ preferences for particular attributes of crop insurance is imperative in informing and designing improved insurance contracts.
Dissertation (MSc (Agric))--University of Pretoria, 2018.
Agricultural Economics, Extension and Rural Development
MSc (Agric)
Unrestricted
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40

Biot, Y. "Forecasting productivity losses caused by sheet and rill erosion in semi arid rangeland : A case study from communal areas of Botswana." Thesis, University of East Anglia, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383247.

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41

Groover, Gordon Eugene. "An evaluation of production and marketing strategies for eastern Virginia cash grain producers /." This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-04272010-020401/.

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42

Bendaoud, Mohamed Lahbib. "Modelling crop-livestock farming systems in semi-arid areas; A case study in North West Syria." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515760.

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43

Dias, Chrislene Nojosa. "Strawberry crop under different conditions of environments and biofertilizer doses the region of Massif de Baturite, CearÃ." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11880.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior
In the Brazilian scenario Strawberry culture is presented as an alternative crop , because it fits in regions of temperate , subtropical and tropical climate, and is an important production chain , from an economic and social perspective. The cultivation in protected environment emerged as an ally in creating a more favorable microclimate production, controlling climate variations at different locations and times of planting. Allied to the environment, fertilization via biofertilizer doses, may contribute to nutrition, establishment and growth of strawberry production. In this approach, the biofertilizer has been presented as an alternative that has been adopted in agriculture as an option of reusing waste without proper destination in the properties. In this context, we conducted a job in the Experimental Farm of the University of International Integration Lusophone African- Brazilian ( UNILAB ), located at Sitio PiroÃs, municipality of RedenÃÃo, CearÃ, in the Massif Baturite, from September 2013 to January 2014, with the objective of evaluating the effects of different cultivation environments and doses of biofertilizer on growth, nutrition, yield and quality of strawberry Oso Grande, and generate technology to be diffused over the handling of the strawberry crop conditions edaphoclimatic of the Massif Baturite region. The experiment was conducted in randomized complete block design with split plot design with four replications. The plots consisted of two cropping systems (under greenhouse and field craft) and subplots consisted of five doses of liquid biofertilizer equivalent to 0, 400, 800, 1200, 1600 mL plant - 1 week - 1. Climatic characteristics of the site, nutritional soil and leaf tissue as a function of different doses of biofertilizer, and still vegetative characteristics of productivity and quality were analyzed. The strawberry crop in greenhouse conditions handmade showed highest yield (10.734 kg ha - 1), in relation to cultivation in open field (9.629 kg ha - 1). The biofertilizer can be used as a source of nutrients in the cultivation of strawberries in open field conditions, cultivar Oso Grande, meeting the demands of culture. The nutrient content in soil and leaves showed significant increases with the application of doses of biofertilizer, contributing to the health of plants. The vegetative characteristics of plants and post- harvest fruit grown in open field conditions showed higher values compared to cultivation in greenhouse condition artisanal, indicating that the temperature and luminosity affects such characteristics. The strawberry crop at conditions of the Massif Baturite - Cearà in months with milder temperatures get higher productivity.
No cenÃrio brasileiro a cultura do Morangueiro apresenta-se como uma alternativa de cultivo, pois se adapta em regiÃes de clima temperado, subtropical e tropical, e representa uma importante cadeia produtiva, do ponto de vista econÃmico e social. O cultivo em ambiente protegido desponta como um aliado na criaÃÃo de um microclima mais favorÃvel a produÃÃo, controlando variaÃÃes climÃticas em diferentes locais e Ãpocas de plantio. Aliado ao ambiente, a adubaÃÃo via doses de biofertilizante, pode contribuir para a nutriÃÃo, estabelecimento e incremento produtivo do morangueiro. Nesse enfoque, o biofertilizante tem se apresentado como uma alternativa que vem sendo adotada na agricultura como opÃÃo de reaproveitamento de resÃduos sem destinaÃÃo adequada nas propriedades. Neste contexto, foi conduzido um trabalho na Ãrea da Fazenda Experimental da Universidade da IntegraÃÃo Internacional da Lusofonia Afro-Brasileira (UNILAB), localizada no SÃtio PiroÃs, municÃpio de RedenÃÃo, CearÃ, no MaciÃo de BaturitÃ, no perÃodo de setembro de 2013 a janeiro de 2014, com o objetivo de avaliar os efeitos de diferentes ambientes de cultivo e de doses de biofertilizante no crescimento, nutriÃÃo, produtividade e qualidade do morangueiro Oso Grande, e gerar tecnologia, para ser difundida, sobre o manejo do cultivo do morangueiro nas condiÃÃes edafoclimÃticas da regiÃo do MaciÃo de BaturitÃ. O experimento foi conduzido no delineamento em blocos ao acaso no esquema de parcelas subdivididas, com quatro repetiÃÃes. As parcelas foram constituÃdas de dois sistemas de cultivo (sob telado artesanal e a campo aberto) e as subparcelas foram constituÃdas por cinco doses de biofertilizante lÃquido equivalentes a 0, 400, 800, 1200, 1600 mL planta-1 semana-1. Foram analisadas as caracterÃsticas climÃticas do local, nutricionais do solo e do tecido foliar em funÃÃo das doses diferenciadas de biofertilizante, vegetativas e ainda caracterÃsticas de produtividade e qualidade. O cultivo do morangueiro em condiÃÃes de telado artesanal apresentou maior produtividade (10.734 kg ha-1), em relaÃÃo ao cultivo em campo aberto (9.629 kg ha-1). O Biofertilizante pode ser utilizado como fonte de nutrientes no cultivo do morango em condiÃÃes de campo aberto, cultivar Oso Grande, atendendo as exigÃncias da cultura. Os teores de nutrientes no solo e nas folhas apresentaram incrementos significativos com a aplicaÃÃo de doses de biofertilizante, contribuindo para a sanidade das plantas. As caracterÃsticas vegetativas das plantas e de pÃs-colheita dos frutos cultivados em condiÃÃes de campo aberto apresentaram maiores valores em relaÃÃo ao cultivo em condiÃÃo de telado artesanal, indicando que a temperatura e a luminosidade afeta tais caracterÃsticas. O cultivo do morangueiro nas condiÃÃes edafoclimÃticas do MaciÃo de BaturitÃ-Cearà em meses com temperaturas mais amenas, obterà maior produtividade.
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44

Munthali, Grace Timanyechi. "Assessing farmers’ willingness-to-way for improved common bean seed varieties in Malawi : a case study of Kasungu and Dedza districts." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/40344.

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Common beans are one of the most important food and cash crops for most Malawians. The insufficient production of the crop in the country coupled with low yields has made scientists give much interest to the crop so that they can address the constraints to the productivity problems. In this regard, breeders have been engaged in the development and release of improved varieties of common beans which in most cases are disease resistant, high yielding, drought resistant, and fast cooking. Therefore it is the interest of this study to find the reasons why productivity of the crop is still low despite the release of the improved varieties. The study adopted contingent valuation (CV), a method frequently used to assess willingnessto- pay of people for non-market goods or services and this was applied to assess farmer’s willingness-to-pay for the new improved bean seed varieties which are high yielding. Double bounded dichotomous choice with an open ended follow-up format was used to obtain the household’s willingness-to-pay. In addition; the study reviewed the existing dissemination channels of bean seed to make recommendations with regard to seed supply. Descriptive statistics from the 132 households interviewed shows that the structural constraints to seed acquisition are compounded by farmers’ poverty. Otherwise, most farmers are aware of the existence of improved varieties of common bean seed and perceive that with the use of this seed, productivity can improve hence willing to pay for the good. The study is 95% confident that mean price farmers are willing to pay for improved common bean seed is between MK 527.78 and MK 591.92. Three major existing informal dissemination channels of bean seed were discovered in the study areas. Therefore there is a need for government to work in collaboration with NGOs towards ensuring a formal supply system of bean seed characterised by vertically organised production and dissemination of tested and approved seed varieties, and using strict quality control rules, so that farmers can be assured of accessing improved seed varieties. This will increase the nation’s food security.
Dissertation (MSc Agric)--University of Pretoria, 2013.
gm2014
Agricultural Economics, Extension and Rural Development
unrestricted
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45

Merz, Andrew A. "Coercion, cash-crops and culture from insurgency to proto-state in Asia's opium belt." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://bosun.nps.edu/uhtbin/hyperion-image.exe/08Jun%5FMerz.pdf.

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Thesis (M.S. in Security Studies (Middle East, South Asia, Sub-Saharan Africa))--Naval Postgraduate School, June 2008.
Thesis Advisor(s): Johnson, Thomas H. ; Malley, Michael S. "June 2008." Description based on title screen as viewed on August 26, 2008. Includes bibliographical references (p. 93-102). Also available in print.
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46

Figueroa-Armijos, Maria A. Valdivia Corinne B. "Strategies to develop market access in the Bolivian highlands two case studies for Chuño and Tunta /." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6456.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 17, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Thesis advisor: Dr. Corinne Valdivia. Includes bibliographical references.
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47

Marroquín, Agréda Francisco Javier. "Sustainable management of fruit orchards in the Soconusco, Chiapas, Mexico intercropping cash and trap crops." Aachen Shaker, 2008. http://d-nb.info/989680797/04.

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48

Castorina, Alessandro. "Urban wastewater reuse in agriculture: recent perspectives from case studies in sicily." Doctoral thesis, Università di Catania, 2016. http://hdl.handle.net/10761/3790.

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The objective of this study was to monitor and assess environmental impacts of reclaimed wastewater (RW), used for irrigation of vegetable crops, on soil, crop quality and irrigation equipment. During 2013, effluents of a horizontal sub-surface flow constructed treatment wetland (TW) system, used for tertiary treatment of sanitary wastewater from a small rural municipality located in Eastern Sicily (Italy), were reused by micro-irrigation techniques to irrigate vegetable crops. Monitoring programs, based on in situ and laboratory analyses were performed for assessing possible adverse effects on water-soil-plant systems caused by reclaimed wastewater reuse. In particular, experimental results evidenced that Escherichia coli content found in RW would not present a risk for rotavirus infection following WHO (2006) standards. Irrigated soil was characterized by a certain persistence of microbial contamination and among the studied vegetable crops, lettuce responds better, than zucchini and eggplants, to the irrigation with low quality water, evidencing a bettering of nutraceutical properties and production parameters.
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49

Hébert, Yann. "Simulating input biotechnology adoption using a system dynamics approach." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=78376.

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A system dynamics model is developed to study the technology adoption process (TAP) of modern agriculture input technology such as the biotechnologies. The work shows that the system dynamics approach is appropriate to integrate the different components considered in the TAP conceptual framework elaborated in this work. The conceptual framework illustrates the different system components found important in the literature, portfolio decision-making, learning, information gathering, uncertainties and economics perceptions and their involved relationships.
The model is first calibrated and validated using the case of soybeans adoption versus corn uses in Quebec from 1987 to 1998. Validation is performed through five tests, namely visual, statistical and sensitivity, modularity and extendibility are performed to show the relevancy of the approach.
The model is then applied to the case of four input biotechnology crops. Again three types of validation tests are carried out. Results show that the model predicted the shape of the curve for all application fields.
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50

Muntrakis, Emelie. "Impacts of large scale sugar investments on local livelihoods seen through the Sustainable Livelihoods Approach : A case study on a multinational sugar company’s presence in Manhiça, Mozambique." Thesis, Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-29239.

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Establishment of big companies in rural areas is something that is getting more and more common as the phenomenon of land acquisition is growing. This study is based on a case study in Manhiça where a big scale multinational sugar company, consisting of a sugar factory and sugarcane plantations, has been present for almost 20 years. The theoretical framework is based on the Sustainable Livelihoods Approach (SLA) that is made into a method by taking dimensions from the theory and converting them into analytical tools. The aim is to identify and analyse the impacts that the company’s activities have on longer term on the capital basis of the various groups with which the company relates. Using the perspective of SLA helps identify the wide range of impacts – direct and indirect, positive and negative – that matter to local people. The study is qualitative and based on semi-structured interviews made with different groups of outgrower farmers and employees as well as representatives for the company and the municipality. The results are, in accordance with the principles underlying the SLA, focusing on the perceptions of people and the dynamic nature of livelihoods. A pilot study is used to indicate which impacts that are a result of the company’s presence and which only a result of switching to cash crops. The study shows that different groups are affected different from the interactions with the company. People with already weak livelihoods are benefited least since their access to different capital assets decrease.
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