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Dive into the research topics where Harro Maat is active.

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Featured researches published by Harro Maat.


PLOS ONE | 2013

Robustness and Strategies of Adaptation among Farmer Varieties of African Rice (Oryza glaberrima) and Asian Rice (Oryza sativa) across West Africa

Alfred Mokuwa; Edwin Nuijten; Florent Okry; Béla Teeken; Harro Maat; Paul Richards; P.C. Struik

This study offers evidence of the robustness of farmer rice varieties (Oryza glaberrima and O. sativa) in West Africa. Our experiments in five West African countries showed that farmer varieties were tolerant of sub-optimal conditions, but employed a range of strategies to cope with stress. Varieties belonging to the species Oryza glaberrima – solely the product of farmer agency – were the most successful in adapting to a range of adverse conditions. Some of the farmer selections from within the indica and japonica subspecies of O. sativa also performed well in a range of conditions, but other farmer selections from within these two subspecies were mainly limited to more specific niches. The results contradict the rather common belief that farmer varieties are only of local value. Farmer varieties should be considered by breeding programmes and used (alongside improved varieties) in dissemination projects for rural food security.


International Journal of Agricultural Sustainability | 2016

Farmers, institutions and technology in agricultural change processes: outcomes from Adaptive Research on rice production in Sulawesi, Indonesia

Rica Joy Flor; Grant R. Singleton; Madonna C. Casimero; Zainal Abidin; Nasruddin Razak; Harro Maat; Cees Leeuwis

International agricultural research centres use approaches which aim to create effective linkages between the practices of farmers, introduced technologies and the wider environment that affects farming. This paper argues that such new approaches require a different type of monitoring as a complement to conventional approaches that tend to favour a quantitative assessment of adoption and impact at the farm level. In this context, we examined monitoring data from an Adaptive Research (AR) project highlighting complementary qualitative analysis. Our emphasis is to capture the improvisational capacities of farmers and to reveal social and institutional constraints and opportunities in a broader innovation system. Our approach provided clear insights into how rice farmers adjusted their practices and how actors involved linked (or not) with others in the innovation system. We also demonstrated how institutions such as policies, religious rituals or service provider arrangements pose conditions that establish or constrain practices aligned with introduced technologies. A broader perspective in monitoring AR therefore provides important additional insights into the factors which shape outcomes in farming communities. To expand outcomes, AR projects should also pay attention to designing and testing new institutional arrangements that create enabling conditions for agricultural innovation.


PLOS ONE | 2014

Processes underpinning development and maintenance of diversity in rice in West Africa: evidence from combining morphological and molecular markers.

Alfred Mokuwa; Edwin Nuijten; Florent Okry; Béla Teeken; Harro Maat; Paul Richards; P.C. Struik

We assessed the interplay of artificial and natural selection in rice adaptation in low-input farming systems in West Africa. Using 20 morphological traits and 176 molecular markers, 182 farmer varieties of rice (Oryza spp.) from 6 West African countries were characterized. Principal component analysis showed that the four botanical groups (Oryza sativa ssp. indica, O. sativa ssp. japonica, O. glaberrima, and interspecific farmer hybrids) exhibited different patterns of morphological diversity. Regarding O. glaberrima, morphological and molecular data were in greater conformity than for the other botanical groups. A clear difference in morphological features was observed between O. glaberrima rices from the Togo hills and those from the Upper Guinea Coast, and among O. glaberrima rices from the Upper Guinea Coast. For the other three groups such clear patterns were not observed. We argue that this is because genetic diversity is shaped by different environmental and socio-cultural selection pressures. For O. glaberrima, recent socio-cultural selection pressures seemed to restrict genetic diversity while this was not observed for the other botanical groups. We also show that O. glaberrima still plays an important role in the selection practices of farmers and resulting variety development pathways. This is particularly apparent in the case of interspecific farmer hybrids where a relationship was found between pericarp colour, panicle attitude and genetic diversity. Farmer varieties are the product of long and complex trajectories of selection governed by local human agency. In effect, rice varieties have emerged that are adapted to West African farming conditions through genotype × environment × society interactions. The diversity farmers maintain in their rice varieties is understood to be part of a risk-spreading strategy that also facilitates successful and often serendipitous variety innovations. We advocate, therefore, that farmers and farmer varieties should be more effectively involved in crop development.


Journal of Vocational Education & Training | 2011

The Role of Materiality in Apprenticeships: The Case of the Suame Magazine, Kumasi, Ghana.

Thomas Jaarsma; Harro Maat; Paul Richards; Arjen E.J. Wals

Although the concept of the apprenticeship seems to be universal, its institutional form and status differ around the world. This article discusses informal apprenticeship training as it occurs among car mechanics in the informal industrial complex of the Suame Magazine, Kumasi, Ghana. Using on-site research and theories of social learning and material culture, it focuses on the material aspects of the apprenticeship training and shows that materiality is, in multiple ways, a crucial aspect for both the content and learning practices of the apprenticeship system. The material nature of the Suame Magazine forms a strong learning environment and the status of apprentices is also directly related to the mastering of specific car parts. Moreover, the increasing use of electronics in vehicles demands a different curriculum for apprentices. The role of materiality in social learning is an apparent, though understudied, element in apprenticeship systems.


Nature plants | 2016

Tracing ancestor rice of Suriname Maroons back to its African origin

Tinde van Andel; Rachel S. Meyer; Saulo Alves Aflitos; Judith Carney; Margaretha Veltman; Dario Copetti; Jonathan M. Flowers; Reinout Havinga; Harro Maat; Michael D. Purugganan; Rod A. Wing; M. Eric Schranz

African rice (Oryza glaberrima) and African cultivation practices are said to have influenced emerging colonial plantation economies in the Americas1,2. However, the level of impact of African rice practices is difficult to establish because of limited written or botanical records2,3. Recent findings of O. glaberrima in rice fields of Suriname Maroons bear evidence of the high level of knowledge about rice among African slaves and their descendants, who consecrate it in ancestor rituals4,5. Here we establish the strong similarity, and hence likely origin, of the first extant New World landrace of O. glaberrima to landraces from the Upper Guinean forests in West Africa. We collected African rice from a Maroon market in Paramaribo, Suriname, propagated it, sequenced its genome6 and compared it with genomes of 109 accessions representing O. glaberrima diversity across West Africa. By analysing 1,649,769 single nucleotide polymorphisms (SNPs) in clustering analyses, the Suriname sample appears sister to an Ivory Coast landrace, and shows no evidence of introgression from Asian rice. Whereas the Dutch took most slaves from Ghana, Benin and Central Africa7, the diaries of slave ship captains record the purchase of food for provisions when sailing along the West African Coast8, offering one possible explanation for the patterns of genetic similarity. This study demonstrates the utility of genomics in understanding the largely unwritten histories of crop cultures of diaspora communities.


International Journal of Tropical Disease & Health | 2016

Knowledge, Attitudes and Practices towards Malaria in Mbonge and Kumba Sub-divisions in Cameroon

Valerie Makoge; Harro Maat; Ndzi Edward; Jerry Emery

Aims: To assess knowledge, attitudes and practices regarding transmission, prevention and treatment of malaria in four rural settings and one urban neighborhood. Study Design: Cross-sectional descriptive survey carried out in Cameroon. Place and Duration of Study: This study took place in rural Mbonge division (Pete, Marumba-1, Marumba-2, and Bai Manya) and one neighbourhood in a urban town (Kumba), South West region of Cameroon between May and July 2015. Methodology: 227 participants (118 males and 109 females) took part in this study. Information was collected with a pre-tested questionnaire with mostly closed-ended questions and a few open-ended questions. Questions focused on socio-demographic parameters, knowledge attitudes and practices with respect to malaria. Data was analysed using SPSS Statistics version 22 (SPSS Inc. IBM). p values <0.05 were considered significant. Results: 118(52%) males and 109(48.0%) females were part of this study. Malaria was listed as the most common disease in all the settings without exception. In the rural settings, respondents related transmission of malaria to mosquito as follows: 53.3% in Pete, 70.7% in Marumba-2, 53.3% in Marumba-1, 65% in Bai Manya. In the urban setting, Kumba, 85.4% of respondents said malaria was caused by a mosquito bite. Other factors listed as ways in which malaria was transmitted include: using the same cup, dirtiness, dirty water, through drugs, bad environment, wind, sun and red fly. Mosquito nets were predominantly used for malaria prevention. These were obtained mostly as government donations. Respondents sought formal help mostly after 48 hours from onset of symptoms. Self-medication was commonly practiced irrespective of setting. Conclusion: This study has shown that participants in Mbonge sub-division and Buea-road Kumba have gaps in knowledge about malaria transmission, prevention and treatment. There is a need for tailored health-education intervention building on formal and local knowledge to reduce the imposed burden of malaria.


PLOS Neglected Tropical Diseases | 2017

Health-Seeking Behaviour towards Poverty-Related Disease (PRDs): A Qualitative Study of People Living in Camps and on Campuses in Cameroon

Valerie Makoge; Harro Maat; Lenneke Vaandrager; M.A. Koelen; Ana Lourdes Sanchez

Poverty-Related Diseases (PRDs) emphasize poverty as a ‘breeding-ground’ for a range of diseases. The study presented here starts from the premise that poverty is a general condition that can limit people’s capacity to prevent, mitigate or treat diseases. Using an interpretation of health seeking behaviour (HSB), inspired by the salutogenic approach, we investigated how people deal with PRDs, their ability and strategies put in place to cope. We collected HSB data from two groups of respondents in Cameroon: labourers of the Cameroon Development Corporation (CDC) living in settlements called camps and students of the state universities of Buea and Yaoundé living in settlements we refer to as campuses. By selecting these groups, the study offers a unique view of how different people cope with similar health challenges. We carried out semi-structured interviews with 21 camp dwellers and 21 students in a cross-sectional study. Our findings revealed 1) respondents use multiple resources to cope with PRDs. 2) Respondents’ perceptions of diseases and connection with poverty closely ties to general hygienic conditions of their living environment. 3) Utilisation of health facilities is not strongly dependent on financial resources. 4) Volatile health facilities are a major challenge and reason for people to revert to other health resources. The study brings out the need for organisations (governmental and non-governmental) to strengthen people’s capacities to cope with health situations through better health and housing policies geared at incorporating practices currently used by the people and supporting pro-hygienic initiatives.


Disasters | 2017

Vulnerability assessments as a political creation : Tsunami management in Portugal

Maartje Pronk; Harro Maat; Todd A. Crane

Vulnerability assessments are a cornerstone of contemporary disaster research. This paper shows how research procedures and the presentation of results of vulnerability assessments are politically filtered. Using data from a study of tsunami risk assessment in Portugal, the paper demonstrates that approaches, measurement instruments, and research procedures for evaluating vulnerability are influenced by institutional preferences, lines of communication, or lack thereof, between stakeholder groups, and available technical expertise. The institutional setting and the pattern of stakeholder interactions form a filter, resulting in a particular conceptualisation of vulnerability, affecting its operationalisation via existing methods and technologies and its institutional embedding. The Portuguese case reveals a conceptualisation that is aligned with perceptions prevalent in national government bureaucracies and the exclusion of local stakeholders owing to selected methodologies and assessment procedures. The decisions taken by actors involved in these areas affect how vulnerability is assessed, and ultimately which vulnerability reduction policies will be recommended in the appraisal.


Journal of Development Effectiveness | 2016

Rice postharvest learning alliance in Cambodia: comparison of assumptions and implementation of a network approach

Rica Joy Flor; Cees Leeuwis; Harro Maat; Martin Gummert

ABSTRACT Research projects employ the learning alliance (LA) approach but there is scepticism that its rhetoric is not evident in practice. The authors examined a case of an implemented LA, comparing its outcomes with assumptions from the project and its conceptual design to evaluate the implementation of an LA. Data were from interviews and network maps of actors involved, as well as farmers and town-level actors in Battambang and Pursat, Cambodia. An LA approach can promote actor–network processes that target social, technical, and institutional reordering. Assumptions about the approach, however, may lead projects to emphasize scaling out and direct efforts away from processes that enable innovation.


Tropical Medicine and Health | 2017

Poverty-related diseases (PRDs): unravelling complexities in disease responses in Cameroon

Valerie Makoge; Harro Maat; Lenneke Vaandrager; M.A. Koelen

BackgroundIn Cameroon, poverty-related diseases (PRDs) are a major public health concern. Research and policies addressing PRDs are based on a particular understanding of the interaction between poverty and disease, usually an association between poverty indicators and health indicators for a specific country or region. Such indicators are useful but fail to explain the nature of the linkages between poverty and disease or poverty and health. This paper presents results of a study among university students, unravelling how they perceive diseases, the linkages with poverty, their responses to diseases and the motivations behind reported responses.Based on the health belief model, this cross-sectional study was carried out among 272 students at the universities of Buea and Yaoundé in Cameroon. Data were collected using questionnaires containing items matching the research objectives. The questionnaires were self-completed.ResultsMalaria was considered as the most common disease perceived and also a major PRD. Contrary to official rankings of HIV/AIDS and TB, cholera and diarrhoea were considered as other major PRDs. Also, typhoid fever was perceived to be more common and a PRD than HIV/AIDS and TB combined. The most prominently attributed cause for disease was (lack of) hygiene. In response, students deployed formal and/or informal healthcare strategies, depending on factors like available money, perceived severity of the disease and disease type. Discrepancies were observed in respondents’ response to diseases generally and to malaria in particular. Even though, overall, respondents pre-dominantly reported a formal healthcare response toward diseases in general, for malaria, informal responses dominated. There was an overall strong awareness and (pro)activity among students for dealing with diseases.ConclusionsAlthough the high use of informal facilities and medication for malaria may well be a reason why eradication is problematic, this seems to be a deliberate strategy linked to an awareness of the limitations of the formal health system. In any intervention intended to foster health, it is therefore vital to consider people’s perceptions toward diseases and their response strategies. Our results give important leads to health promotion interventions to develop group-specific programs.

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Lenneke Vaandrager

Wageningen University and Research Centre

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M.A. Koelen

Wageningen University and Research Centre

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Valerie Makoge

Wageningen University and Research Centre

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Rica Joy Flor

International Rice Research Institute

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Arjen E.J. Wals

Wageningen University and Research Centre

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Cees Leeuwis

Wageningen University and Research Centre

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Dominic Glover

Wageningen University and Research Centre

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Todd A. Crane

International Livestock Research Institute

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Alfred Mokuwa

Wageningen University and Research Centre

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