Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Feeding Dar es Salaam: a symbiotic food system perspective
Wegerif, Marc C.A. - \ 2017
Wageningen University. Promotor(en): Han Wiskerke, co-promotor(en): Paul Hebinck. - Wageningen : Wageningen University - ISBN 9789463432061 - 291
agricultural society - rural society - farmers' markets - food products - agricultural products - supermarkets - rice - grain - tanzania - east africa - agrarische samenleving - plattelandssamenleving - boerenmarkten - voedselproducten - landbouwproducten - supermarkten - rijst - graan - oost-afrika

This thesis is a sociological analysis of the agri-food system that feeds most of the over four and a half million residents of the fast-growing city of Dar es Salaam in Tanzania. It is based on qualitative research that has generated a picture of the food system that supplies the important foods for the majority of residents of the city. The research took an actor orientated approach and started from urban eaters and then followed the food back through retailers, processors and transporters to the primary producers. Methodological lessons are derived from this process in particular the elaboration of the ‘ride-along’ as a research method. Foods followed include maize, rice, potatoes, green vegetables, eggs and milk. Other foods such as beef and chicken have also been touched on especially in relation to marketing and slaughtering operations.

Instead of dismissing what has been found as ‘informal’ or trying to fit it into structuralist paradigms, from orthodox economic or political economy perspectives, I have applied a grounded theory approach in seeking to understand the core ordering principles and rationality of this system that has shown a remarkable resilience over many years. Of particular interest, especially when looking at the functioning of market places and how new actors enter into the food system, is that more important to the food system than competition are various forms of collaboration.

This study comes at a time when global food production and distribution is dominated by powerful transnational corporations through an agro-industrial food system that is widely critiqued for its negative environmental and social impacts. Many argue that this industrial food system is unsustainable, yet its expansion can seem inevitable and alternatives are seen by many as incapable of feeding the world’s growing and increasingly urban population. ‘Value chain’ interventions have become popular among ‘development’ practitioners and policy makers seeking to integrate more producers into the global industrial food system rather than challenging that food system.

What I have found, and present in this thesis, is a ‘symbiotic food system’ made up of multitudes of small-scale and interdependent actors that produce the food and get it to urban eaters at a city feeding scale. They do this without any vertically - or horizontally -integrated corporate structures nor with government planning and organization of the food system. This food system responds well to the needs of urban eaters, especially those in poverty, and to the interests and circumstances of small scale food producers. It is a food system that outperforms value chain interventions in returns to producers and value to eaters and has social, economic and environmental advantages when compared to the agro-industrial and corporate dominated system. This challenges assumptions that corporate food chains are necessary, or desirable, to feed cities sustainably. The symbiotic food system that feeds Dar es Salaam is not perfect, but it is working and I believe worthy of further research and interventions to create a more enabling environment for such foods systems to flourish in Tanzania and elsewhere.

Mission report Tanzania : scoping mission marine fisheries Tanzania
Hoof, Luc van; Kraan, Marloes - \ 2017
IJmuiden : Wageningen Marine Research (Wageningen Marine Research rapport C004/17) - 66
zeevisserij - visserij - voedselzekerheid - zeewieren - samenwerking - handel - tanzania - marine fisheries - fisheries - food security - seaweeds - cooperation - trade
Pesticides in the Southern Agricultural Growth Corridor of Tanzania (SAGCOT) : a scoping study of current and future use, associated risks and identification of actions for risk mitigation
Lahr, Joost ; Buij, Ralph ; Katagira, Franciska ; Valk, Harold van der - \ 2016
Wageningen : Wageningen Environmental Research (Wageningen Environmental Research rapport 2760) - 71
pesticides - environmental management - risk - health - integrated pest management - extension - tanzania - pesticiden - milieubeheer - risico - gezondheid - geïntegreerde plagenbestrijding - voorlichting
SAGCOT, the ‘Southern Agricultural Growth Corridor of Tanzania’, is a coordinated initiative to boost agricultural output in southern Tanzania through public and private investment, to improve food security, reduce rural poverty and sustain the environment. The ‘Sustainability and Inclusion Strategy for Growth Corridors in Africa’ (SUSTAIN-Africa) programme by the International Union for Conservation of Nature (IUCN) develops and demonstrates climate resilient solutions for water security and inclusive land resource and agricultural development in growth corridors and areas of intensive economic development in Africa. To develop an efficient, competitive and sustainable agricultural sector in SAGCOT, possible adverse effects of pesticide use need to be addressed and minimized. For this purpose a scoping study was conducted, consisting of a literature survey, a scoping mission and a stakeholder workshop. The study revealed that there are many issues related to pesticide management and pesticide risks that need attention when the SAGCOT is further developed and pesticide use increases. The most important recommendations of the study are (1) better implementation and enforcement of current rules and regulations for pesticides, (2) training and awareness creation for pesticide users, (3) creation of a multi-stakeholder platform for exchange on best pest and pesticide management practices in the SAGCOT, (4) a regulatory body at the local government authority level to enforce/monitor pesticide management and life cycle, and (5) development of a monitoring and evaluation framework on pesticides for the SAGCOT.
Objective prioritization of intervention areas for the NAGA Foundation in the Kenya Tanzania border area
Maat, H.W. ter; Hutjes, R.W.A. ; Fleskens, L. ; Querner, E.P. ; Klostermann, J.E.M. ; Jaspers, A.M.J. - \ 2016
Alterra, Wageningen-UR (Alterra-rapport 2711) - 67 p.
hydrology - restoration management - climate - soil - geographical information systems - vegetation - models - tanzania - kenya - hydrologie - herstelbeheer - klimaat - bodem - geografische informatiesystemen - vegetatie - modellen
The NAGA foundation aims to establish Hydrologic Corridors, wherein re-greening and restoration of
the landscape interacts with regional rain-bringing wind patterns to intensify the local hydrologic cycle
to a point that a permanently greener and more productive ecosystem can be sustained. The initial
search area, as defined by NAGA, targets the Kenya-Tanzania border region and identified four
possible Hydrological Corridors. This report supports an objective prioritisation of potential
intervention locations in this larger domain. Therefore, readily available, geographically explicit
information on soil, vegetation, hydrology and climate, as well as institutional settings that may affect
the likelihood of success of such projects, were collected and analysed, and some climate-modelling
experiments were performed.
Combining the findings of the four themes: hydrology, soil restoration, climate, and institutions, and
ranking the four potential corridors objectively in order of priority, favours re-greening projects in the
Tanzanian corridors could provide the best starting point: especially the most eastern one. In this
area, many applicable land management options exist in combination with a high potential for
restoring soil organic matter, the highest rainfall recycling potential in the more favourable long rainy
season, and the apparent reliability of the Tanzanian governments at both national- and at local
levels. The GIS data facilitate further focus on this particular corridor in search of specific project
locations
Green vegetable supply in Dar es Salaam
Wegerif, M.C.A. - \ 2015
Urban Agriculture Magazine (2015)29. - ISSN 1571-6244 - p. 65 - 67.
farmers - farmers' income - livelihoods - urban agriculture - food supply - vegetables - rural urban relations - tanzania - peasant farming - boeren - inkomen van landbouwers - middelen van bestaan - stadslandbouw - voedselvoorziening - groenten - relaties tussen stad en platteland - landbouw bedrijven in het klein
This article constructs a picture of green vegetable growing and supply in Dar es Salaam by looking at the lives and work of a small trader and an urban farmer. It reveals the importance of a range of distribution and trade networks and the integration of a wider city region, alongside urban and periurban production, for the large-scale supply of these vegetables to urban eaters. The livelihood benefit for the many actors involved is clear as are some of the threats emerging as the city changes.
Everyday social dynamics and cultural drivers of women's experiences with HIV/AIDS : voices from Buhaya, Tanzania
Foster Githinji, V.E. - \ 2015
Wageningen University. Promotor(en): Paul Richards, co-promotor(en): Todd Crane; Harro Maat. - Wageningen : Wageningen University - ISBN 9789462575806 - 124
gezondheidszorg - humane immunodeficiëntievirussen - acquired immune deficiency syndrome - huishoudens - man-vrouwrelaties - vrouwen - voedselzekerheid - tanzania - oost-afrika - afrika - health care - human immunodeficiency viruses - households - gender relations - women - food security - east africa - africa

Everyday social dynamics and cultural drivers of women’s experiences with HIV/AIDS: voices from Buhaya, Tanzania is based on ethnographic research conducted in the village of Nsisha in northwestern Tanzania. Like most households in this region, Nsisha has been indirectly or directly affected by HIV/AIDS, meaning that either household members have been infected by HIV/AIDS, or households have absorbed children from their extended family and clan who have been orphaned by HIV/AIDS. In whole, the tiers of research and the in-depth questions asked and detailed answers recorded yield four different cross-sectional analyses of the ‘ecology’ of poverty and HIV/AIDS in Buhaya: (1) one which cuts across social stratification within the community, arguing who has more social capital and how this affects their vulnerability; (2) a second which focuses primarily on food and agricultural issues, and more specifically – bananas; (3) a third cross sectional category which centers on climate factors; (4) and a fourth and final category for this thesis which cuts across age categories and focuses on the social variation of widowhood.

Eutrophication, Nile perch and food-web interactions in south-east Lake Victoria
Cornelissen, I.J.M. - \ 2015
Wageningen University. Promotor(en): Johan Verreth, co-promotor(en): Leo Nagelkerke; R. Vijverberg. - Wageningen : Wageningen University - ISBN 9789462575660 - 163
lates niloticus - eutrofiëring - voedselwebben - interacties - visserijbiologie - visstand - dynamica - fytoplankton - distributie - voedingsgedrag - victoriameer - tanzania - eutrophication - food webs - interactions - fishery biology - fish stocks - dynamics - phytoplankton - distribution - feeding behaviour - lake victoria

The increasing eutrophication, the introduction of Nile perch (Lates niloticus) and the increasing fishing pressure has changed Lake Victoria tremendously the last century. Since the 1960s, eutrophication increased primary production, enabling an increase in fish production. However, eutrophication also created hypoxia pockets, which reduced the available habitats for fish. In addition, the endemic haplochromines declined, whereas the introduced Nile perch boomed in the 1980s. The Nile perch boom and increased fish production resulted in the largest freshwater fisheries of the world. However, it is unclear whether fish production can still increase with further eutrophication as maximum primary production rates may have been reached. Fish stocks fluctuate since the 1980s and in order to manage these, it is important to understand how eutrophication and fisheries affect the Nile perch population. The present study investigates the bottom-up effects of eutrophication on the Nile perch and food-web dynamics in south-east Lake Victoria. We analysed the level of eutrophication along an eutrophication gradient in the Mwanza Gulf. Phytoplankton biomass varied spatially and seasonally and was limited by nutrients in deep water and by light in shallow water. Fish distributions were dynamic, with environmental factors depth and temperature influencing Nile perch size structure and distribution patterns similarly on small and large spatial scales. Although prey densities of haplochromines and Caridina nilotica shrimp did not explain Nile perch distributions, ontogenetic diet shifts and composition were related to prey densities, suggesting an opportunistic feeding behaviour of Nile perch. Small Nile perch however, showed some preference to shrimp and Nile perch preferred haplochromines above Dagaa (Rastrineobola argentea) and juvenile Nile perch as fish prey. On a food-web level, the base of the food web was spatially and seasonally highly dynamic. The onset of rains caused a spatial differentiation in littoral/benthic and pelagic carbon sources, affecting the whole food web. Trophic levels of fish were related to the spatial variation in diet compositions. Although a large heterogeneity was found in water quality, fish distributions and food-web structure, bottom-up processes affected the food web similarly. Despite the ongoing nutrient load in Lake Victoria, water quality has improved since the 1990s. Climate forcing through increasing wind speeds increased visibility and oxygen levels. Global climate change will therefore be an important driver of the water quality and fish distributions of Lake Victoria.

Sixty-five data sets of profit, labour input, fertilizer and pesticide use in seventeen vegetable crops of the Arusha region, Tanzania
Everaarts, A.P. ; Putter, H. de - \ 2015
Lelystad : PPO AGV (PPO/PRI report 652) - 77
groenteteelt - rentabiliteit - input van landbouwbedrijf - kosten - arbeid (werk) - inkomen - tanzania - investering - penen - voederkool - koolsoorten - tomaten - aardappelen - bemesting - gewasbescherming - vegetable growing - profitability - farm inputs - costs - labour - income - investment - carrots - kale - cabbages - tomatoes - potatoes - fertilizer application - plant protection
This report contains the 65 individual crop data sets to the related report A.P. Everaarts, H. de Putter and A.P. Maerere, 2015. Profitability, labour input, fertilizer application and crop protection in vegetable production in the Arusha region, Tanzania.PPO Report 653.
Profitability, labour input, fertilizer application and crop protection in vegetable production in the Arusha region, Tanzania
Everaarts, A.P. ; Putter, H. de; Maerere, A.P. - \ 2015
Lelystad : PPO AGV (PPO/PRI report 653) - 37
groenteteelt - rentabiliteit - input van landbouwbedrijf - kosten - arbeid (werk) - inkomen - tanzania - investering - penen - voederkool - koolsoorten - tomaten - aardappelen - bemesting - gewasbescherming - vegetable growing - profitability - farm inputs - costs - labour - income - investment - carrots - kale - cabbages - tomatoes - potatoes - fertilizer application - plant protection
An analysis was made of the inputs, costs and profit of vegetable production in three areas in the Arusha region of Tanzania. The major aim of the study was to establish whether vegetable producers would have the means to invest in modern production methods, such as hybrid seeds and drip irrigation, to improve and intensify their production.
Participatory appraisal of institutional and political constraints and opportunities for innovation to address parasitic weeds in rice
Schut, M. ; Rodenburg, J. ; Klerkx, L.W.A. ; Hinnou, L.C. ; Kayeke, J. ; Bastiaans, L. - \ 2015
Crop Protection 74 (2015). - ISSN 0261-2194 - p. 158 - 170.
fed lowland rice - striga-hermonthica control - raais rapid appraisal - sub-saharan africa - socioeconomic constraints - integrated analysis - pest-management - systems - benin - tanzania
Parasitic weeds in smallholder rice production systems, of which Striga asiatica, Striga hermonthica and hamphicarpa fistulosa are the main representatives, form an increasing problem for food and income security in sub-Saharan Africa (SSA). The objective of this paper is to identify institutional and political constraints and opportunities for innovation to address parasitic weed problems in rice. Constraints and opportunities for innovation were studied across three nested systems: the parasitic weed control system, the crop protection system, and the agricultural system. Multi-stakeholder workshops, interviews and surveys were held to gather data on key constraints faced by different stakeholder groups across three parasitic weed infested study sites in both Tanzania and Benin. The results demonstrate that in both countries, the majority of institutional and political constraints relate to the functioning of the broader crop protection and agricultural systems and not specifically to parasitic weeds. Although differences were observed between the two countries and the different stakeholder groups, the majority of constraints perceived by the stakeholders were caused by a lack of capabilities and resources and a limited access to credit. Awareness raising of parasitic weed problems among farmers, extension and crop protection officers at the local level, combined with improved input and service supply and enhanced agricultural education and training curricula at the national level, were identified as important elements for improvement. More structural collaboration between key stakeholder groups is expected to contribute to a better recognition of agricultural problems, like that of parasitic weeds in rice, and a more timely identification of feasible solutions.
A social analysis of contested fishing practices in Lake Victoria
Medard, M. - \ 2015
Wageningen University. Promotor(en): Han van Dijk, co-promotor(en): Paul Hebinck; R. Mwaipopo. - Wageningen : s.n. - ISBN 9789462572478 - 278
visserij - gemeenschappen - productiviteit - hulpbronnen - ontwikkeling - sociologie - organisatie - visserijbeheer - ondernemerschap - meren - tanzania - fisheries - communities - productivity - resources - development - sociology - organization - fishery management - entrepreneurship - lakes

Thesis abstract

The thesis explored how the global market for Nile Perch fish has reconfigured the social and the natural in dramatic ways. The demand for Nile Perch and Dagaa played, willingly or unwillingly, an important role in converting its products into regionally and globally desired commodity. It has also simultaneously restructured the organisation of fisheries into a complex and aggressively managed sector. In fishing and fish trade, one needs to externalize costs and risks to the lower actors in the production and business hierarchy. From an historical point of view, power has shifted from many points of coordination and decision making into a few hands, those that own fishing camps and export processing factory. Moreover, illegal fishing and trading are continuous and corruption is rife to safe guard individual interest in turn shaping the local practices (governance) of Lake Victoria. Finally the debate about fisheries policies and fisheries regulation in L. Victoria does not address local realities and are largely irrelevant and that the real focus of power and driver of change is the international and regional markets for Nile Perch and Dagaa and global players with a lot of capital.

Sleutel naar optimalisatie en adaptief beheer drinkwatersystemen
Hunen, S.E. van; Slobbe, E.J.J. van - \ 2015
H2O : tijdschrift voor watervoorziening en afvalwaterbehandeling 45 (2015)17. - ISSN 0166-8439 - p. 9 - 11.
drinkwater - watervoorziening - gedragsveranderingen - tanzania - drinking water - water supply - behavioural changes
De zorgen over de strijd om water en de toekomstige balans tussen vraag en aanbod in gebruiksfuncties zijn wijd verspreid, zeker in het licht van klimaatverandering, bevolkingsgroei, technologische en economische veranderingen. Instituties die duurzamer zijn en goed met onzekerheden omgaan kenmerken zich door mechanismen die snelle aanpassing aan veranderingen mogelijk maken. Monitoren van de waterkwaliteit kan verrassingen voorkomen. Het is een geschikte methode, die zowel aansluit op de behoefte aan adaptief beheer als inzichten oplevert die leiden tot een beter resultaat. Ter illustratie dient een studie die in het noorden van Tanzania is uitgevoerd naar een drinkwatersysteem dat wordt beheerd door een lokale Maasai-gemeenschap
Work and Masculinity in Katanga's Artisanal Mines
Cuvelier, J.G.R. - \ 2014
Afrika Spectrum 49 (2014)2. - ISSN 0002-0397 - p. 3 - 26.
conflict sierra-leone - mining town - african - gold - men - diamonds - tanzania - identity - culture - economy
This article, based on 16 months of anthropological fieldwork between 2005 and 2012, examines the relationship between work and masculinity among ardsanal miners, or creuseurs, in Katanga, the southeastern province of the Democratic Republic of the Congo. It argues that men's involvement in ardsanal mining should be considered not only as an economic survival strategy but also as an attempt to experiment with new ways of being a man in a context of economic crisis and changing gender relations. Furthermore, the article criticizes the tendency to downplay or underestimate the complexity and diversity of processes of masculine identity construction in Africa's ardsanal-mining areas. In order to do justice to the intricacy of these processes, the article proposes using concepts and insights from the field of masculinity studies and distinguishing between a levelling and a differentiating trend in artisanal miners' masculinity practices.
Risk perception and management in smallholder dairy farming in Tigray, Northern Ethiopia
Gebreegziabher, K. ; Tadesse Woeldesenbet, T. - \ 2014
Journal of Risk Research 17 (2014)3. - ISSN 1366-9877 - p. 367 - 381.
tick-borne diseases - kenya highlands - cattle - tanzania - systems - prevalence - economics - adoption - farmers - region
Empirical studies on smallholder dairy farmers' risk perceptions and management strategies have still received little attention in agricultural research of developing countries. This study focuses on farmers' risk perception and management strategies of smallholder dairy farms in urban and peri-urban areas of Tigray in northern Ethiopia. Based on data collected from a sample of 304 smallholder dairy farm households, we used descriptive statistics for analyzing farmers' risk attitude and factor analysis for analyzing and classifying risk sources and management strategies. The majority of dairy farmers considered themselves risk takers towards farm decision that may have a positive impact on technology adoption. Factor analysis identified technological, price/market, production, financial, human, and institutional factor as major sources of risks. In addition, factor analysis indicates that disease reduction, diversification, financial management, and market network are perceived as the most effective risk management strategies. Our findings indicate that perceptions of risk and management strategies are farmer-specific; therefore, policy-makers need to consider tailor-made strategies that would address farmers' individual motives to manage risks and shocks.
Field vegetable production in the Lake Zone of Tanzania
Everaarts, A.P. ; Putter, H. de; Maerere, A.P. ; Amon, W. - \ 2014
Lelystad : Applied Plant Research - 103
vollegrondsgroenten - gewasproductie - groenteteelt - marketing - tanzania - field vegetables - crop production - vegetable growing
In November 2012 and in August 2014 surveys were carried out in field vegetable producing areas in the Lake Zone of Tanzania. The aim of the surveys was to learn the conditions for field vegetable production and marketing in these areas. Recommendations for the development of vegetable production were formulated in order to enlarge the supply of vegetable products and secure a balanced nutrition for the rural and urban population.
Vegetation dynamics prior to wildlife reintroductions in southern umfurudzi park, Zimbabwe
Muposhi, V. ; Ndlovu, N. ; Gandiwa, E. ; Muvengwi, J. ; Muboko, N. - \ 2014
The JAPS 24 (2014)6. - ISSN 1018-7081 - p. 1680 - 1690.
gonarezhou national-park - tree species-diversity - woody vegetation - miombo woodlands - tanzania - forest - size - herbivores - elephants - savannas
Vegetation assessments are critical in the status and success of reintroduction programs and are an important aspect in ecological restoration. Vegetation structure and composition influences the suitability and availability of unique habitats for different wildlife species. The objectives of this study were to (1) establish the vegetation structure and composition, and (2) determine the soil-vegetation associations in southern Umfurudzi Park, Zimbabwe, prior to the reintroduction of wildlife species. Using a stratified random design, 15 rectangular plots from three strata were assessed in April and May 2012. A total of 23 woody plants from 58 tree and 68 shrub families as well as 30 grass species were recorded. Tree basal area, canopy cover, tree density, tree and grass species diversity, and tree height for the riverine strata were significantly different from the miombo and vlei strata. The influence of soil properties on the occurrence and diversity of woody and grass species was evident across the three strata. Long-term changes in the vegetation dynamics and primary productivity in southern Umfurudzi Park due to the reintroduced mega-herbivores is recommended for the success of the restoration program.
Co-investment paradigms as alternatives to payments for tree-based ecosystem services in Africa
Namirembe, S. ; Leimona, B. ; Noordwijk, M. van; Bernard, F. ; Bacwayo, K.E. - \ 2014
Current Opinion in Environmental Sustainability 6 (2014). - ISSN 1877-3435 - p. 89 - 97.
environmental services - conservation - challenges - tanzania - design
Multiple paradigms have emerged within the broad payments for ecosystem services (ES) domain for internalizing externalities of local land-use change decisions. These range from reward of ready-made ES delivery (commoditised) to reward of processes of ES generation (co-investment). Evidence from tree-based projects in Africa suggests that currently, only carbon sequestration and emission reduction are ‘commoditised’, however in an artificial way where payments are not matched to ES delivery, but adjusted or supplemented with co-benefits. Co-investment in stewardship alongside rights is more widespread and versatile for a variety of ES. Efficiency concerns of co-investment schemes can be addressed when commoditised ES or profitable enterprises with positive ES externalities evolve from these.
Community Monitoring of Carbon Stocks for REDD+: Does Accuracy and Cost Change over Time?
Brofeldt, S. ; Theilade, I. ; Burgess, N.D. ; Danielsen, F. ; Poulsen, M.K. ; Adrian, T. ; Nguyen Bang, T. ; Budiman, A. ; Jensen, J. ; Jensen, A.E. ; Kurniawan, Y. ; Laegaard, S.B.L. ; Mingxu, Z. ; Noordwijk, M. van; Rahayu, S. ; Rutishauser, E. ; Schmidt-Vogt, D. ; Warta, Z. ; Widayati, A. - \ 2014
Forests 5 (2014)8. - ISSN 1999-4907 - p. 1834 - 1854.
local people - forests - implementation - conservation - tanzania - payments
Reducing emissions from deforestation and forest degradation in developing countries, and the role of conservation, sustainable management of forests, and enhancement of forest carbon stocks in developing countries (REDD+) is a potentially powerful international policy mechanism that many tropical countries are working towards implementing. Thus far, limited practical consideration has been paid to local rights to forests and forest resources in REDD+ readiness programs, beyond noting the importance of these issues. Previous studies have shown that community members can reliably and cost-effectively monitor forest biomass. At the same time, this can improve local ownership and forge important links between monitoring activities and local decision-making. Existing studies have, however, been static assessments of biomass at one point in time. REDD+ programs will require repeated surveys of biomass over extended time frames. Here, we examine trends in accuracy and costs of local forest monitoring over time. We analyse repeated measurements by community members and professional foresters of 289 plots over two years in four countries in Southeast Asia. This shows, for the first time, that with repeated measurements community members’ biomass measurements become increasingly accurate and costs decline. These findings provide additional support to available evidence that community members can play a strong role in monitoring forest biomass in the local implementation of REDD+.
Socio-economic impacts and determinants of parasitic weed infestation in rainfed rice systems of sub-Saharan Africa
N'cho, A.S. - \ 2014
Wageningen University. Promotor(en): Alfons Oude Lansink, co-promotor(en): Monique Mourits; J. Rodenburg. - Wageningen : Wageningen University - ISBN 9789462571266 - 160
rijst - agrarische productiesystemen - gewasproductie - onkruiden - parasitaire onkruiden - striga hermonthica - striga asiatica - controle - onkruidbestrijding - regenafhankelijke landbouw - economische impact - sociale factoren - besluitvorming - boeren - afrika ten zuiden van de sahara - benin - ivoorkust - tanzania - rice - agricultural production systems - crop production - weeds - parasitic weeds - control - weed control - rainfed agriculture - economic impact - social factors - decision making - farmers - africa south of sahara - cote d'ivoire

Keywords: rice; weed; weed management practices, adoption, impact, parasitic weeds; Rhamphicarpa fistulosa; Striga asiatica; Striga hermonthica, double hurdle model; multivariate probit, productivity, stochastic frontier analysis, data envelopment analysis, directional distance function, sub-Saharan Africa, Benin, Cote d’Ivoire, Tanzania.

Socio-economic impacts and determinants of parasitic weed infestation in

rainfed rice systems of sub-Saharan Africa

Simon A. N’cho

Abstract

Rice is an important strategic crop for food security in sub-Saharan Africa. However, its production is constrained by many biotic and abiotic stress. In rainfed rice systems, weeds and particularly parasitic weeds are among the most damaging constraints. The objective of this thesis was to identify factors affecting infestation of rice farms by parasitic weeds and to assess the economic and social impact of parasitic weeds on primary producers of rainfed rice systems in order to provide guidance for decision-making for rice farmers and policymakers aiming at developing strategies for coping with parasitic weeds. To achieve this objective, we first explored biophysical characters of the rice growing environment, farmers’ management practices, and socio-economic characteristics that affect the infestation of rice fields by parasitic weeds (PWs) and farmers’ ability to cope with the problem. A double hurdle model was used to analyses simultaneously the likelihood of occurrence and the severity of infestation of the PW. The findings suggest that farmers can cope with the PW as long as they are aware of the problem provided they have a good access and management capacity of production resources. Next, we examined weed management practices (WMPs) currently available to farmers and how PW infestation affect their choices for specific combinations of WMPs using a multivariate probit model. Findings indicate that farmers are more likely to adopt improved weed management practices or combined more WMPs when their fields are infested by PWs. Species-specific and country-specific approaches and technologies are require to address the PW problem. Then, we assessed the impact of parasitic weeds infestation on farmers’ productivity and examined how this problem and managerial factors prevent farmers from achieving optimal technical efficiency levels using a stochastic frontier analysis (SFA). PWs induce productivity losses ranging from 21% to 50%. Farmers seem to cope with PW through learning from experiencing PW problem. Finally, we estimated weeding labour inefficiencies using a Data Envelopment Analysis (DEA) with directional input distance function and a single truncated bootstrap regression to identify sources of inefficiencies. Results suggest that, farmers can save substantial (58% – 69%) weeding labour without reducing rice production. No evidence was found that the currently used manual weeding modalities were able to manage parasitic weeds efficiently. The main finding of this thesis is that in sub-Saharan Africa, PWs infestation has a negative impact on rainfed rice systems’ productivity and the use of production resources. However, these impacts can be reduced if farmers have a good access to production resources and manage them efficiently.

What policy says and practice does : gender, household and community in rural water provision in Tanzania
Mandara, C.G. - \ 2014
Wageningen University. Promotor(en): Anke Niehof, co-promotor(en): Hilje van der Horst; Ron van Lammeren. - Wageningen : Wageningen University - ISBN 9789462571334 - 201
watervoorziening - plattelandsgemeenschappen - waterbeheer - geslacht (gender) - vrouwen - huishoudens - duurzaamheid (sustainability) - tanzania - water supply - rural communities - water management - gender - women - households - sustainability
Summary

Since 1945 to date the governance of the rural water sector in Tanzania has passed through multiple phases, from the colonial era to the times characterized by liberalization, decentralisation and privatization. Generally, changes in the policies and governance strategies reflect a correspondence with national and international reforms in the political and economic spheres. In turn, these changes made the sector to experience pendulum swings over time in terms of policies and achieve­ments.

The main objective of this study was to examine how gender, household and community shape the appropriateness, accessibility and sustainability of domestic water schemes in rural Tanzania, and to explore whether and in what ways domestic water services take women’s gender needs into account. The study aimed at a critical analysis of the policy-practices nexus in terms of appropriate­ness, accessibility and sustainability in the contexts of the household and the community as representing the water users and hosting local water management structures, respectively.

The theoretical pillars of the study are ecological modernisation theory, gender theory, the concept of users’ perspective, and the community management model. These were blended into one theoretical framework. The fieldwork for the study was conducted between October 2011 and September 2012 in the rural districts of Kondoa and Mpwapwa in Dodoma region, in central Tanzania. It consisted of three overlapping phases in which quantitative and qualitative research methods were used to collect data from multiple units of analysis. Data collection for primary data was done through the household survey, focus group discussions, interviews with key informants, village and women case studies, participatory sketch mapping, and field observation. Secondary data was collected through the analysis of information from relevant documents at the village, district and national levels. Overall a total number of 334 respondents were involved in the study.

The study found that accessibility to the improved domestic water services is associated with seasonality and that, surprisingly, the average distance to the water distribution points increases during the rainy season. This is because then few water distribution points are operational. The mean number of users per water point is higher than the standard set by the policy guidelines, because the planning and designing of the water schemes rely on population projections and do not take migration and the spatial distribution of the population into account.

It was found that there is a difference between the existing water policy and practices related to domestic water uses and management at the micro levels of the household and the village. Within the household, the provision and use of domestic water is organised based on the gendered division of labour in domestic production. At the community level, the same pattern of the gendered division of labour influences men’s and women’s participation in the management of the public water schemes. At both levels the gendered division of labour and performance of men and women is shaped by social norms and traditions that are rooted in patriarchal culture. Women relate to domestic water more closely than men because they are the managers, providers and users of water for carrying out their reproductive roles in the household. This makes women knowledgeable about the appropriateness of water for domestic uses. However, women’s preferences and perceptions on the appropriateness of the domestic water are rarely integrated in the designing and planning phases of water projects. The government, in collaboration with the international community, has established women quota to ensure women’s participation in local decision-making spaces and management structures. However, the informal structures which are embedded in the normative traditions within and beyond the household, explicitly and implicit­ly deter women’s involvement in the public management of the water schemes.

Water users’ participation, and women’s participation in particular, was very minimal in the pre-implementation phase of village water projects. Hence, the users’ perspectives are poorly represented in the early stages of the water schemes. In general, there was low community participation not only before but also after implementation of the water schemes. Additionally, the sustainability of the rural water infrastructures is endangered mainly because water using communities have been assigned technical and managerial roles without being equipped with the corresponding capabilities. The district water departments which are responsible to provide technical support to the villages, are also confronted with shortages of human and financial resources plus inadequate transport facilities.

The findings from this study reveal the need to review the existing water policy and change the current community management approach. This thesis concludes by identifying ways forward through research, programs and policies to improve the rural domestic water provision in Tanzania.

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