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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The more important crop pests of Ethiopia and their control

Bushen, Yoseph Sibba, 1929- January 1962 (has links)
No description available.
2

Livelihood strategies in the context of population pressure : a case study in the Hararghe Highlands, Eastern Ethiopia

Tefera, Tesfaye Lemma 02 September 2005 (has links)
The thesis presented the results of an investigation into livelihood strategies of rural households in the Hararghe Highlands in the context of population pressure. The human welfare and resource outcomes of rural livelihood strategies were assessed, accounting for the “mediating” factors. The study enriches the current policy debate on how to create an enabling environment to strengthen sustainable rural livelihoods and mitigate adverse welfare and resource consequences of unsustainable rural livelihood strategies. The sustainable livelihood framework for analysing rural livelihoods in the context of population pressure was modified in the thesis to guide the analyses. Primary data was obtained from 197 randomly selected households from three representative sites in the Hararghe Highlands. Whilst verbal description, interpretation and appreciation of facts, and case studies were used for the qualitative data analysis, multivariate techniques and logistic regression were employed to analyse the quantitative data. The study showed that subdivision and fragmentation of agricultural land and re-emergence of landlessness have accompanied the unprecedented population growth in the Hararghe Highlands. The pace of demographic change of the area is so fast that it has caused failure of indigenous countervailing and adaptations. Sufficient effective demand for sustainable intensification of smallholder farms has, however, not been created due to uncertain right to the land and inadequate market incentives. Furthermore, the technology generation and dissemination systems have failed to build the capacity of smallholder farmers to respond to the demographic pressure in a sustainable way. This has generally resulted in negative welfare and resource outcomes. Nonetheless, rural households pursue heterogeneous livelihood strategies due to differential access to livelihood assets, and heterogeneous constraints and incentives. The nature and the extent of welfare and resource outcomes of rural livelihood strategies are different across sites and among different households. A livelihood strategy that integrates cash crop production with high external input-based staple crops production and trade was found to be more successful. Overall, the findings challenge the current untargeted and uniform intervention that implicitly assumes that only farming and the intensification of staple crop production for food self-sufficiency is important to all households. Furthermore, the findings challenge the over simplified generalisations regarding the human welfare and resource effects of rural population growth in Ethiopia as if the interactions between them were taking place in a political, an institutional and an agro-climatic vacuum and as if rural households in a district, a sub-district or a village were a “homogeneous” group. What is thus needed is decentralisation of rural development planning and building of the capacity of local institutions so that they may be able to understand rural livelihoods and design innovative and locally specific integrated interventions to support sustainable rural livelihoods. The specific recommendations include ensuring land tenure security, improving farmers’ access to the market and appropriate technologies, creating conducive environment for commercialisation and livelihood diversification, institutionalised safety net, resettlement and family planning. / Thesis (PhD (Rural Development Planning))--University of Pretoria, 2006. / Agricultural Economics, Extension and Rural Development / unrestricted
3

Analysis of models of development in Ethiopia on ADLI policy after Ethio-Eritrean war of 1998-2000

Masomelele, Mviko January 2012 (has links)
In this research, the researcher is analysing the models of development in Ethiopia on ADLI policy after the Ethio-Eritrean War of 1998-2000. As a post- conflict country it is always important to know how a country reconstructs its economy after the war. The researcher will give a brief background of Ethiopia with her different regime changes. Ethiopia is a landlocked country and is found in the Horn of Africa. Her boarders are Eritrea on the north and north east, and Djibouti and Somalia on the East, Kenya on the south, on the west and south west by Sudan. (BCC) Ethiopia has been under three remarkably different political regimes; the feudal imperial era under Emperor Haile Selassie; the socialist military dictatorship of Colonel Mangistu’s Derg; and the marketoriented Western aligned democracy of Prime Minister Meles Zenawi.(Devereux et al,2005:121 ) Each regime had applied different policies on agriculture which employs 80 percent of the population. Feudal policies where the land was in the hands of the landlords failed during Selassie’s regime and this was proved by the famine of 1974. He was overthrown by Derg in a coup in 1974. Derg introduced a “radical agrarian transformation based on land redistribution. His policies on agriculture were based on the Marxist egalitarian ideology and by conviction that feudal relations in agriculture had exposed millions of highland Ethiopians to intolerable levels of poverty and vulnerability.” (Devereux et al, 2005:121-122). According to Derg’s agricultural policy land was confiscated from the landlords and was redistributed to the rural farmers and it was trying to break inequalities over land control and it aimed at achieving agricultural productivity and rural incomes. Derg’s regime was overthrown by Ethiopian Peoples’ Revolutionary Democratic Front (EPRDF) in 1991. EPRDF further continued with land redistribution in the wake of 1990s and it gave farmlands to demobilised soldiers and tried to correct the inequalities that emerged with time as farming families were growing. (Devereux et al, 2005:122) In all these regimes, land was owned by the state. Ethiopian economy is based on agriculture which contributes 47 percent to GNP and more than 80 percent of exports, and employs 85 percent of the population. Ethiopia’s agriculture is plagued by periodic droughts, soil degradation emanating from poor agricultural practices and overgrazing, deforestation, high population density, underdeveloped water resources and poor transport infrastructure which makes extremely difficult and expensive to get goods to the market. (BCC, 07) The EPRDF came up with the new agricultural policy in the beginning of 1991 and it was known as Agriculture Development Led Industrialisation (ADLI). ADLI is the policy that emphasised on modernising smallholder agriculture and intensifying yield productivity through the supply of appropriate technology, certified seeds, fertilizers, rural credit facilities and technical assistance. (Getachew, 2003:9) This policy introduced some reforms in agriculture as it introduced a nationwide agricultural extension program, the propagation of laws that liberalised the purchasing and distribution of inputs and to increase and to make credit facilities available to rural farmers. In 1995 Minister of Agriculture (MoA) introduced a vehicle to drive the policy, which was called the Plan for Accelerated and Sustained Development to End Poverty (PADETES). The PADETES started with 32047 farmers on board. The aim was to educate farmers in new farming methods which will increase productivity and make farmers self sufficient. Agriculture Sample Survey 2009/10 states that ‘country’s experience showed that farmers’ attitude and tendency to adapt and accept new innovations, modern agricultural techniques and technologies, such as use of fertilizers, irrigation, improved seeds and pesticides that help to improve their living standards through attaining enhanced productivity, do have positive impact on the development on the agricultural sector as a whole.’(Central Statistical Agency, 2010: i) Teshome (2006:1) shows complexity of Ethiopian agriculture when he says that it largest contributor to the GDP, exports and foreign earnings and it employs almost 85 percent of the population. On the contrary, despite its socio-economic importance its performance continues to be low due to many natural and manmade factors which will be discussed in this research.
4

Comparative analysis of gender related farm households in the Arsi-Negele farming zone in Ethiopia

Chiche, Yeshi 15 August 2005 (has links)
Please read the abstract in the section 00front of this document / Dissertation (MSc (Agricultural Extension))--University of Pretoria, 2005. / Agricultural Economics, Extension and Rural Development / unrestricted
5

Productivity analysis of private and socialized agriculture in Ethiopia

Mirotchie, Mesfin January 1989 (has links)
The system of cereal grain production in Ethiopia has been stratified into private, cooperative and state farms since the 1975 land reform. The private farms are being gradually replaced by the cooperative farms while the state farms are receiving increased technical and budgetary assistance by the Ethiopian government. lt is, however, not clear if these policies are consistent with the technical characteristics of these three modes of production. This study, therefore, evaluated technical efficiency, impacts of known and latent input factors, and returns to scale parameters for each farm type. Sample data were collected from Ethiopia on five cereal crops, namely, barley, com, sorghum, teff and wheat and several input factors, including labor, land, oxen, traditional farm implements, tractors, machinery services, modern yield·increasing inputs, livestock, education and rainfall over 77 awrajjas for the 1980-1986 production period. A covariance regression model was applied with these data to determine an appropriate functional form between the Cobb-Douglas and translog production functions. The Translog functional form was selected for the analysis on the basis of statistical tests. Results of the analysis suggest that the producer cooperatives collectively appear to have a potential to generate increased gross income per hectare at a declining rate with respect to an equiproportionate increase in all inputs, except land, upon an increasing average cost of production per unit of cereal output. The private and state farms appear to be operating with a close to fixed proportions type of production technology with a constant average cost of production per unit of cereal output per hectare. Moreover, the range of substitutability between input factors tends towards a complementary relationship as the institutional transformations and management techniques of the cereal producing farms shift from the traditional to a more advanced and centrally managed state mode of production. Partial income elasticity parameters suggest that (a) the private sector’s gross income per hectare is most responsive to traditional hand tools, fertilizer, labor, human capital at primary level of education, and rain in August and September; (b) the cooperative sector’s gross income per hectare is most responsive to the use of tractors and September rain; whereas (c) gross income per hectare of the state farms is most responsive to the use of traditional labor, machinery services and rain in June and August. Thus, Ethiopia’s agricultural income production per hectare is likely to be revitalized by: (a) qualitative changes in the traditional inputs, water management, and introduction of modem technical inputs such as fertilizer and farmer education in the private sector; (b) increased traditional labor employment, improved management of water, machinery and modem yield-increasing inputs on the state farms; and (c) a better usage of tractors and collaborative input factors, improved water management, and a substantial increase in capital investment to achieve full employment of the seemingly redundant labor and oxen input factors on the cooperative farms. It seems unlikely that the producer cooperatives will achieve the goal of maximum cereal output per hectare with the most prevalent composition of the redundant traditional input factors which contribute insignificantly at the margin without a major change in the current production techniques and structural policies of the sector. / Ph. D.
6

Analytical study on the appraisal of communal land use management practices and policies towards climate resilience and sustainability in Bir-Temicha Watershed of the Upper Blue Nile Basin, Ethiopia

Tenaw Hailu Tedela 03 1900 (has links)
This study was aimed at analysing communal land use management practices and policies towards sustainability and climate resilience. The objectives of this study were to assess rainfall variability, climate change impact, adaptation practices and impediment factors for adaptation on the one hand and, on the other, analysing the pressure, scrutinising the sustainability of institutional practices, and assessing policy setting and its application status in managing communal lands. To conduct the study, a household survey, key informant interviews and group discussions were used. It employed both quantitative and qualitative methods. For analysis, rainfall variability trend analysis, different empirical formulas, Principal Component Analysis and analysis of variance were used. In addition, Qualitative Content Analysis technique and descriptive statistical tools were also used. The study found that there was spatiotemporal rainfall variability. About 18 extreme wet and 8 extreme dry events were depicted out of 194 frequencies of events. The most outstanding manifestations of climate change/variability impacts identified were: water scarcity, migration, severe erosion and feed scarcity. Applying biophysical measures on communal lands, practicing area enclosure and constraction of feeder road were moderately excersised adaptation and mitigation practices while, low level community awareness was the most outstanding barrier for community adaptation. Besides, feed source and fuel biomass energy did not satisfy community demand. Government recognition to support community user groups, the existence of community labour contribution and congruence between government legislation and community by-laws were found moderately strong. Besides, communal land administration and use of legislative setting and instruments to govern land administration were adequately in place to implement communal land use and management. However, workability of by-laws in applying them at the ground was a major weakness. In conclusion, the study revealed that there exist generally a weak communal land use management practices and policy implementation towards enhancing sustainability and climate resilience. Hence, the following recommendations were forwarded: enhancing community awareness, encouraging communities to establish their own private woodlots and grazing areas to reduce the pressure on communal land, applying proper communal land resource use and management plans and certifying communal lands with demarcation and maps should be given due emphasis to enhance sustainability. Moreover, policy and legislation evaluation and revision to improve its application at the ground is fundamental. On top of this, further research endeavour is still paramount important to scrutinize the integral effects of the biophysical, social, cultural and legislative dimensions for better sustainable and climate resilient communal land use management practices and policy implementation / College of Agriculture and Environmental Sciences / Ph. D. (Environmental Management)
7

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

Abiyot Legesse Kura 11 1900 (has links)
This dissertation is conducted in Gedeo, with the aim of revealing the dynamics of IK of agroforestry system of Gedeo. The dynamics were seen from the perspective of the intergenerational variation in IK acquisition and transmission. The study investigated drivers of IK changes and continuities and the implications to sustainability. The study employed an interdisciplinary approach whereby geographical concepts and approaches were supplemented by anthropological and developmental psychology approaches and concepts. Thus, an exploratory mixed research approach was used. The dynamics were seen by employing cross-sectional approach. Thus, synchronic data were collected from several sources, by employing ranges of qualitative and quantitative tools. The respondents were drawn from the local people and agricultural experts. Accordingly, 72key informants were chosen through purposive and snowball sampling. To determine the spatio-temporal variation of IK, 290 informants aged between 12 and 65 were chosen using multistage stratified sampling. For the household survey, 252 participants were selected using multistage stratified and systematic random sampling. The qualitative data were analyzed using thematic content analysis and case summary while for quantitative data mean, standard deviation, ANOVA, chi-square, and t-test were employed. The analysis results have shown that the agroforestry system exhibits both indigenous and modern practices. The indigenous practices, which sustained for longer time through generational transfer, appear to be engulfed by modern practice. The study identified knowledge and skill gap between young people and adults. The gap is more significant in normative dimension of IK. This can be attributed to declining rate of IK transmission and acquisition among successive generations, which in turn is attributed to weak contact between young people and adults, and changes in the lifestyle of the young people. Besides, biodiversity loss, demographic pressure, modernization, introduction of market economy, and top-down development approach are among the drivers of the gradual loss of IK. The gradual loss of IK was to have an impact on sustainability of the system. This calls for concerted efforts to maintain the sustainability of IK through revitalization of IK transmission and acquisition. Finally, joint effort is required to document IK, include in school curriculum, and integrate with the modern practices. / Geography / Ph. D. (Geography)
8

Assessment of environmental-livestock interactions in crop-livestock systems of central Ethiopian highlands

Nigatu Alemayehu Minase 09 1900 (has links)
The study was done in Adaa district which is one of the 12 districts in East Shoa zone in Oromia regional state of Ethiopia. It is located southeast of Addis Ababa at 38o51’ 43.63’’ to 39o04’ 58.59’’ E and 8o46’ 16.20’’ to 8o59’ 16.38’’ N, on the western margin of the Great East African Rift Valley. The altitude ranges from 1 500 to ≥ 2 000 meters above sea level. The district has a high potential for mixed livestock and crop production systems. The purpose of this study was to make up for the paucity of information on livestock and environment interaction by assessing the relationship of livestock, soil, water, land, climate and crops under mixed crop-livestock production systems in central Ethiopian highlands. The objectives of the study were: (a) to assess the effect of change in land management on carbon storage and the contribution of livestock to carbon storage; (b) to examine the impact of livestock on natural resources and the environment; (c) to assess the effects of the change in traditional agricultural practices, expansion of factories, slaughter houses, greenhouses and flower farms on water and soil quality; (d) to evaluate the effect of climate change on livestock production under small-scale agriculture; and (e) to recommend options for mitigation and adaptation to environmental changes. The research design was non-experimental and did not involve the manipulation of the situation, circumstances or experiences of the interviewees. The design was comparative research that compared two or more groups on one or more variables, such as the effect of agricultural land use management, tillage type etc. on carbon storage in the soil. This research also applied a longitudinal design that examined variables such as the performance exhibited by groups over time. Purposive sampling was often used to measure the effect of agricultural, industrial effluent and human interferences on the environment by measuring nutrient contents at sources in the soil, water and manure. Biological data were complemented by key socio-economic survey by interviewing individual farmers and focus groups from sampling sites. Secondary data were also reviewed to measure soil degradation and run-off attributed to livestock. Results showed that animal waste and farmyard manure had the highest contribution in the addition of carbon in the soil. This implied that for most of carbon inputs livestock products and by-products had a greater place in the carbon sink. Therefore, livestock production could be considered as one of the major agricultural production systems in soil carbon storage. Similarly, livestock production systems also play an important role in maintaining the eco-system balance through nutrient recycling. On the average, the number of livestock per household for most species increased during the Derge regime in the 1990s compared to the Haile Sellassie regime in the 1970s when people did not own land; and then the number declined in the 2000s except for equines, crossbreeds and oxen. The change to crop intensification led to the change in the purpose for livestock keeping. Farmers started keeping certain types of animals for specific purposes unlike before when livestock was kept for prestige and economic security. The major drive for the change of attitude towards the purpose of keeping livestock was scarcity of resources, mainly feed and water. Equine ownership has significantly increased due to their low off-take rate and their feeding habits which allowed them to survive in harsh environments where feed resources were extremely scarce. There was a significant difference in crop response to manure application. Vegetables produced higher yields with manure than chemical fertilizers. Cereals on the other hand responded more to chemical fertilizers than to manure. Therefore, combining manure and chemical fertilizers was the best option for the sustainability of crop production in the study area. Some of the limitations to the use of manure as an organic fertilizer were inadequate manure production, high labour cost, bulkiness and high cost of transport to the fields and weed infestation. Manure management systems in the study area were affected by livestock husbandry practices. Only crossbred cattle (5%) were zero-grazed and used; and manure was stored in pits as slurry. Indigenous cattle were grazed outdoors in the fields during the day and at night they were kept in kraals near homesteads. There was a substantial loss of nutrients during the day when animals were grazing in the fields through leaching and trampling of dung and urine patches. Indoor or zero grazing of livestock could reduce nutrient losses. The use of manure as fuel in the study area had no significant effect on CO2 emissions at household or local level, but had a negative impact on soil organic carbon storage and soil fertility. Therefore, for improved yield and balanced eco-systems manure burning has to be replaced by other alternative energy sources such as bio-gas and kerosene. The largest carbon equivalent emissions were from CH4 (72.6%), N2O (24%) and CO2 (3.4%) which indicated the need to improve livestock and manure management systems under smallholder agriculture. Overall, there was an indication of a decline in water resources on per capita basis. The major contributing factors were combined pressure of human and animal population on natural resources that led to excessive deforestation, loss of biological diversity, overgrazing, soil degradation and various forms of pollution and contamination. The global climate change also played a role in the decline in water resources due to the decrease in annual precipitation and increasing temperatures. Urbanization and economic growth increased the demand for milk and meat, which required additional water use for each unit of increased animal protein. The demand for milk and meat is expected to double in the next 20 years with an annual growth rate of between 2.5 to 4%. From the sixty-year meteorological data (1951-2009) there was an established increase in rainfall by 2% per annum; and maximum and minimum temperature by 0.08oC per decade, which amounted to a cumulative temperature increase of 0.5oC in the last decade. The increase in precipitation and temperature favoured the adaption of lowland crops like maize and sorghum to highland agro-ecology. Climate prediction models forecasted that most of the highlands in Ethiopia will remain suitable for cereals like wheat and Teff for the next 50 to100 years. However, the perception of farmers indicated that they felt more heat and warm weather than they have experienced before. They reported that rainfall is now more erratic or comes late and stops earlier before plants completed their vegetative growth. / Environmental Sciences / D. Litt. et Phil. (Environmental Science)
9

"God has locked the sky" : exploring traditional farming systems in Tigray, Ethiopia

Derakhshani, Nava 04 1900 (has links)
Thesis (MPhil)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: The Tigray region in northern Ethiopia is a historic centre of agricultural production and home to many subsistence farmers that still use traditional farming systems and practise rain-fed agriculture. The region has been affected adversely by famines and periodic droughts for centuries and is vulnerable to climate change. Farmers are producing on small plots of often degraded land and through their own actions have depleted the natural resources they rely on, in particular soil, water and trees. This study sought to explore the environmental degradation of Tigray through both a literature review of its agricultural socio-political history and a lived experience in the village of Abraha We Atsebaha among farmers of the region. It uses a variety of methodologies and methods, including a literature review, grounded theory, narrative inquiry and ethnography, to expand on the factors that have contributed to the current degradation, the implications for traditional farming and the potential for land regeneration. The first journal article seeks to explore how Ethiopians have shaped their natural environment. In particular, it focuses on deforestation, soil degradation, the role of changing governance and land-ownership patterns, and the effects of climate change. The article demonstrates that traditional farming systems do not operate in isolation from their socio-political and environmental context. The second journal article provides an in-depth narrative inquiry conducted in Abraha We Atsebaha over a three-month period in 2014. This village is known for its indigenous farming knowledge, commitment to regeneration and innovation in conservation practices. Interviews were conducted with selected farmers and local leaders and informal discussions were carried out with government extension representatives using the ethno-ecological cosmos-corpus-praxis guidelines to enable an integrated exploration of the nature of traditional farming, the causative factors of environmental deterioration and the resultant communal response. In addition to written interview notes, observations and field notes were recorded daily. Photographs are used to give a real sense of the community and their work. It emerged during this process that underlying belief systems were exceptionally important in a context of traditional conservation. Both articles discuss the development work undertaken by government in the rural farming sector and the successes and challenges faced. They also show that elements of traditional farming, sustainability measures and environmental care were suspended in favour of short-term survival as a consequence of social, political and population stressors. This study provides learning points, gained from insights gleaned from the literature review and the lived experience, for improving development interventions in this region. This study did not explicitly explore the role of religion in conservation or the potential long-term effects of current government policies and initiatives. However, it contributes to the small pool of literature on the region focused on traditional farming systems by providing a comprehensive overview of the drivers of degradation (historical and current) and offers a unique, “soft” experiential narration of a village in northern Ethiopia that allows insight into farmer experiences, pressures and adaptation efforts. / AFRIKAANSE OPSOMMING: Die Tigray-streek in die noorde van Ethiopië is ’n historiese sentrum van landbouproduksie en die tuiste van menige bestaansboer wat nog op tradisionele boerderystelsels en reënbesproeiing staatmaak. Die streek het eeue lank onder hongersnood en periodieke droogtes gebuk gegaan en is kwesbaar vir klimaatsverandering. Boere bewerk klein stukke, dikwels afgetakelde, grond en het deur hul eie optrede die natuurlike hulpbronne waarop hulle staatmaak – veral die grond, water en bome – uitgeput. Hierdie studie was daarop toegespits om ’n beter begrip te vorm van die omgewingsaftakeling in Tigray. Vir hierdie doel is ’n literatuurstudie van die sosiopolitieke landbougeskiedenis van die gebied onderneem, en is die lewe in die dorp Abraha We Atsebaha tussen boere van die streek ervaar. Die navorsing het van ’n verskeidenheid metodologieë en metodes, waaronder ’n literatuuroorsig, gegronde teorie, narratiewe ondersoek en etnografie, gebruik gemaak om lig te werp op die faktore wat tot die huidige aftakeling bygedra het, die implikasies vir tradisionele boerdery, en die potensiaal vir grondvernuwing. Die eerste tydskrifartikel verken hoe Ethiopiërs hul natuurlike omgewing gevorm het. Dit konsentreer veral op ontbossing, grondaftakeling, die rol van veranderende staatsbestuurs- en grondbesitpatrone, en die uitwerking van klimaatsverandering. Die artikel toon dat tradisionele boerderystelsels nie afsonderlik van hul sosiopolitieke en omgewingskonteks funksioneer nie. Die tweede tydskrifartikel beskryf ’n narratiewe diepte-ondersoek wat oor ’n drie maande lange tydperk in 2014 in Abraha We Atsebaha onderneem is. Hierdie dorp is bekend vir sy inheemse landboukennis, toewyding aan vernuwing, en innoverende bewaringspraktyke. Onderhoude is met ’n uitgesoekte groep boere en plaaslike leiers gevoer, en voorligtingsbeamptes van die staat is by informele gesprekke betrek. Die etno-ekologiese cosmos-corpus-praxis-riglyne is gebruik om ’n geïntegreerde studie te onderneem van die aard van tradisionele boerdery, die oorsaaklike faktore van omgewingsaftakeling, en die gevolglike gemeenskapsreaksie. Benewens skriftelike aantekeninge gedurende die onderhoude, is waarnemings en veldnotas ook daagliks opgeteken. Foto’s word gebruik om die gemeenskap en hul werk getrou uit te beeld. Gedurende hierdie proses het aan die lig gekom dat onderliggende oortuigingstelsels besonder belangrik is in ’n tradisionele bewaringskonteks. Albei artikels bespreek die ontwikkelingswerk wat die regering in die landelike boerderysektor onderneem, sowel as die suksesse en uitdagings daarvan. Dit toon ook dat elemente van tradisionele boerdery, volhoubaarheidsmaatreëls en omgewingsorg as gevolg van maatskaplike, politieke en bevolkingsfaktore laat vaar is ten gunste van korttermynoorlewing. Die insigte wat uit die literatuuroorsig sowel as die lewenservaring in die bestudeerde gemeenskap spruit, bied lesse vir die verbetering van ontwikkelingsintervensies in die streek. Die studie het nie uitdruklik die rol van godsdiens in bewaring of die potensiële langtermynuitwerking van huidige staatsbeleide en -inisiatiewe ondersoek nie. Tog dra dit by tot die klein hoeveelheid beskikbare literatuur oor tradisionele boerderystelsels in die streek deur ’n omvattende oorsig te bied van die (historiese en huidige) snellers van aftakeling, en vertel dit ’n unieke, ‘sagte’ ervaringsverhaal oor ’n dorp in die noorde van Ethiopië om sodoende insig in landbou-ervarings, -druk en -aanpassingspogings te bied.
10

Assessment of environmental-livestock interactions in crop-livestock systems of central Ethiopian highlands

Nigatu Alemayehu Minase 09 1900 (has links)
The study was done in Adaa district which is one of the 12 districts in East Shoa zone in Oromia regional state of Ethiopia. It is located southeast of Addis Ababa at 38o51’ 43.63’’ to 39o04’ 58.59’’ E and 8o46’ 16.20’’ to 8o59’ 16.38’’ N, on the western margin of the Great East African Rift Valley. The altitude ranges from 1 500 to ≥ 2 000 meters above sea level. The district has a high potential for mixed livestock and crop production systems. The purpose of this study was to make up for the paucity of information on livestock and environment interaction by assessing the relationship of livestock, soil, water, land, climate and crops under mixed crop-livestock production systems in central Ethiopian highlands. The objectives of the study were: (a) to assess the effect of change in land management on carbon storage and the contribution of livestock to carbon storage; (b) to examine the impact of livestock on natural resources and the environment; (c) to assess the effects of the change in traditional agricultural practices, expansion of factories, slaughter houses, greenhouses and flower farms on water and soil quality; (d) to evaluate the effect of climate change on livestock production under small-scale agriculture; and (e) to recommend options for mitigation and adaptation to environmental changes. The research design was non-experimental and did not involve the manipulation of the situation, circumstances or experiences of the interviewees. The design was comparative research that compared two or more groups on one or more variables, such as the effect of agricultural land use management, tillage type etc. on carbon storage in the soil. This research also applied a longitudinal design that examined variables such as the performance exhibited by groups over time. Purposive sampling was often used to measure the effect of agricultural, industrial effluent and human interferences on the environment by measuring nutrient contents at sources in the soil, water and manure. Biological data were complemented by key socio-economic survey by interviewing individual farmers and focus groups from sampling sites. Secondary data were also reviewed to measure soil degradation and run-off attributed to livestock. Results showed that animal waste and farmyard manure had the highest contribution in the addition of carbon in the soil. This implied that for most of carbon inputs livestock products and by-products had a greater place in the carbon sink. Therefore, livestock production could be considered as one of the major agricultural production systems in soil carbon storage. Similarly, livestock production systems also play an important role in maintaining the eco-system balance through nutrient recycling. On the average, the number of livestock per household for most species increased during the Derge regime in the 1990s compared to the Haile Sellassie regime in the 1970s when people did not own land; and then the number declined in the 2000s except for equines, crossbreeds and oxen. The change to crop intensification led to the change in the purpose for livestock keeping. Farmers started keeping certain types of animals for specific purposes unlike before when livestock was kept for prestige and economic security. The major drive for the change of attitude towards the purpose of keeping livestock was scarcity of resources, mainly feed and water. Equine ownership has significantly increased due to their low off-take rate and their feeding habits which allowed them to survive in harsh environments where feed resources were extremely scarce. There was a significant difference in crop response to manure application. Vegetables produced higher yields with manure than chemical fertilizers. Cereals on the other hand responded more to chemical fertilizers than to manure. Therefore, combining manure and chemical fertilizers was the best option for the sustainability of crop production in the study area. Some of the limitations to the use of manure as an organic fertilizer were inadequate manure production, high labour cost, bulkiness and high cost of transport to the fields and weed infestation. Manure management systems in the study area were affected by livestock husbandry practices. Only crossbred cattle (5%) were zero-grazed and used; and manure was stored in pits as slurry. Indigenous cattle were grazed outdoors in the fields during the day and at night they were kept in kraals near homesteads. There was a substantial loss of nutrients during the day when animals were grazing in the fields through leaching and trampling of dung and urine patches. Indoor or zero grazing of livestock could reduce nutrient losses. The use of manure as fuel in the study area had no significant effect on CO2 emissions at household or local level, but had a negative impact on soil organic carbon storage and soil fertility. Therefore, for improved yield and balanced eco-systems manure burning has to be replaced by other alternative energy sources such as bio-gas and kerosene. The largest carbon equivalent emissions were from CH4 (72.6%), N2O (24%) and CO2 (3.4%) which indicated the need to improve livestock and manure management systems under smallholder agriculture. Overall, there was an indication of a decline in water resources on per capita basis. The major contributing factors were combined pressure of human and animal population on natural resources that led to excessive deforestation, loss of biological diversity, overgrazing, soil degradation and various forms of pollution and contamination. The global climate change also played a role in the decline in water resources due to the decrease in annual precipitation and increasing temperatures. Urbanization and economic growth increased the demand for milk and meat, which required additional water use for each unit of increased animal protein. The demand for milk and meat is expected to double in the next 20 years with an annual growth rate of between 2.5 to 4%. From the sixty-year meteorological data (1951-2009) there was an established increase in rainfall by 2% per annum; and maximum and minimum temperature by 0.08oC per decade, which amounted to a cumulative temperature increase of 0.5oC in the last decade. The increase in precipitation and temperature favoured the adaption of lowland crops like maize and sorghum to highland agro-ecology. Climate prediction models forecasted that most of the highlands in Ethiopia will remain suitable for cereals like wheat and Teff for the next 50 to100 years. However, the perception of farmers indicated that they felt more heat and warm weather than they have experienced before. They reported that rainfall is now more erratic or comes late and stops earlier before plants completed their vegetative growth. / Environmental Sciences / D. Litt. et Phil. (Environmental Science)

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