PhD theses

All Wageningen University PhD theses

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    Wageningen PhD theses

    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

    Hard copies of all theses are available for loan at WUR Library. To request them, click the link Request this publication in the full record presentation. This is a fee based service.

    mail icon WUR Library, 9 july 2012


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Risk attitude and risk perception in agroforestry decisions : the case of Babati, Tanzania [PhD thesis]
Senkondo, E.M.M. \ 2000
agroforestry - cropping systems - risk - uncertainty - decision making - farmers' attitudes - perception - utility functions - tanzania
Broiler breeding : breeding goals, selection schemes and the usefulness of local breeds for China [PhD thesis]
Jiang, X. \ 1999
broilers - animal breeding - fowls
Design for participation in ecologically sound management of South Africa's Mlazi River catchment [PhD thesis]
Auerbach, R. \ 1999
resource management - water resources - water harvesting - learning - participation - organic farming - design - small farms - rural communities - schools - south africa
Long term storage of clonal material of lily (Lilium L.) [PhD thesis]
Bonnier, F.J.M. \ 1997
lilium - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - tissue culture - embryo culture - storage - liliaceae - ornamental plants
Parkia biglobosa (Leguminosae) en Afrique de l'Ouest : biosystematique et amelioration [PhD thesis]
Ouedraogo, A.S. \ 1995
mimosoideae - fabaceae - forestry - trees - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - west africa - parkia biglobosa
The genus Lolium : taxonomy and genetic resources [PhD thesis]
Loos, B.P. \ 1994
grasses - poaceae - lolium - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - taxonomy - botany - isoenzymes - enzymology - plant anatomy - plant morphology
Beta section beta : biogeographical patterns of variation, and taxonomy [PhD thesis]
Letschert, J.P.W. \ 1993
chenopodiaceae - taxonomy - botany - fodder beet - beta vulgaris - sugarbeet - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - flora - phytogeography - germination - seed germination - seed dormancy - sicily - beta
The use of crop growth simulation in evaluation of large germplasm collections : distribution, variation and evaluation of Syrian durum wheat landraces = [Het gebruik van gewasgroeisimulatie in de evaluatie van grote genenbank collecties : verspreiding, variatie en evaluatie van Syrische durum tarwe landrassen] [PhD thesis]
Elings, A. \ 1992
growth - crops - computer simulation - simulation - simulation models - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources
The systematic description of cacao clones and its significance for taxonomy and plant breeding [PhD thesis]
Engels, J.M.M. \ 1986
biological nomenclature - classification - clones - cocoa - gene banks - genetic resources - germplasm - plant genetic resources - resource conservation - taxonomy - theobroma cacao
Piecing together complexity: the co-evolution of agroecosystem patterns & natural resource management [PhD thesis]
Full text publicly available; under embargo until:2021-09-17
Caulfield, Mark E. \ 2019
The conservation and use of crop genetic resources for food security [PhD thesis]
Khoury, C.K. \ 2015
plant genetic resources - genetic diversity - germplasm - agricultural development - climate adaptation - wild relatives - ex situ conservation - food security

Cum laude graduation Among the factors hindering the conservation of crop genetic resources is a lack of essential information regarding this diversity. Questions include: (a) what is the status of diversity in our food systems, and where are the greatest vulnerabilities?, (b) where can genetic diversity be found that can be useful in increasing productivity and mitigating these vulnerabilities?, (c) is this genetic diversity available in the present and in the long term?, and (d) what steps are needed to improve the ability for researchers to access genetic resources critical for present and future crop improvement? This thesis aims to contribute to the knowledge required to answer these questions through an exploration of the need for, potential of, challenges and constraints regarding, and necessary steps to enhance the conservation and use of crop genetic diversity.

The governance capacity of forest land allocation policy in Vietnam [PhD thesis]
Thi Kim Phung, D. \ 2014
forest policy - forestry - governance - government policy - allocation - vietnam
Biomass for biodiesel production on family farms in Brazil: promise or failure? : integrated assessment of biodiesel crops, farms, policies and producer organisations [PhD thesis]
Dal Belo Leite, J.G. \ 2013
biodiesel - biomass - family farms - crops - crop production - policy - sustainability - helianthus annuus - brazil - biofuels - biobased economy

In Brazil, a biodiesel policy was implemented as a way of reducing poverty among family farms. The objective of this thesis is to perform an integrated assessment of biodiesel crops, farm types, biodiesel policies and producer organisations that reveals opportunities and limitations of family farmers’ engagement in the biodiesel supply chain.

Integrated modelling for land use planning and policy recommendation in the Northern Uplands of Vietnam [PhD thesis]
Bui Tan Yen \ 2013
land use planning - land use - modeling - policy - resource management - natural resources - erosion - agricultural production - vietnam
Analysing and exploring land use decisions by smallholder agrowetland households in rural areas of East Africa [PhD thesis]
Sakané, N. \ 2011
small farms - farmers - decision making - agricultural production systems - land use - wetlands
Quantifying the contribution of crop-livestock integration to African farming [PhD thesis]
Rufino, M.C. \ 2008
systems analysis - agriculture - farming systems - cycling - manures - use efficiency - animal feeding - farmers - small farms - resource conservation - africa south of sahara
Fate of estrogens in biological treatment of concentrated black water [PhD thesis]
Mes, T. de \ 2007
oestrogens - oestrogenic properties - sewage sludge - water pollution - waste water treatment - hormones - biological treatment - sewerage

Feminisation of male fish is for a large part due to compounds entering surface waters via wastewater. For domestic wastewater, two natural estrogens, estrone and 17-estradiol and the synthetic estrogen, constituent of the contraceptive pill, are mainly responsible for this effect. These compounds are excreted by humans and in conventional treatment systems sometimes insufficiently removed. A solution can be found in the implementation of innovative sanitation concepts like source separated collection and treatment of black water (toilet), grey water (shower, kitchen, laundry) and rain. As the three compounds will be mainly present in black water, contamination by storm water overflows is completely excluded and the concentrated character of the wastewater allows for more energy efficient treatment systems. Present research showed the first step, anaerobic treatment where energy is as well produced as conserved, is unfavourable to satisfactory remove these compounds and the aerobic post-treatment only partly. As the volume of the stream is remarkably smaller compared to conventional systems (7 liter black water per person per day against 200 liter wastewater per person per day), a necessary tertiary treatment, for which ozonation is promising, will be more compact. Besides, current research shed light on several parameters influencing the degradation of estrogens in biological systems

Conservation scenarios for olive farming on sloping land in de Mediterranean [PhD thesis]
Fleskens, L. \ 2007
olea europaea - olives - production - sloping land - mediterranean region - conservation - erosion - sustainability - agroecosystems
Food insecurity in fragile lands : Philippine cases through the livelihood lens [PhD thesis]
Roa, J.R. \ 2007
less favoured areas - philippines - agricultural households - food security - food policy - nutrition - food production - agricultural economics - livelihood strategies
Integrated treatment of tapioca processing industrial wastewater based on environmental bio-technology [PhD thesis]
Mai, H.N.P. \ 2006
waste water treatment - tapioca - food processing - anaerobic treatment - sewage sludge - vietnam - factory effluents
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