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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Lignin-based bio-asphalt
Landa, P.A. ; Gosselink, R.J.A. - \ 2019
Octrooinummer: WO2019092278, verleend: 2019-05-16.
The present invention relates to a composition comprising bitumen; optionally vegetable oil or derivative thereof; and a lignin preparation, wherein the lignin preparation is characterized by a lignin purity of 60-100 wt.% with respect to the weight of the lignin preparation; and a lignin average molecular weight of 1000-5000 g/mol. The composition may be an asphalt binder composition or asphalt composition. Accordingly, the present invention also relates to a paving or roofing comprising the composition of the invention.Further, the present invention relates to a method of preparing an asphalt composition, comprising mixing bitumen with filler material, adding lignin preparation and vegetable oil to the mixture obtained, preferably wherein the lignin preparation and the vegetable oil are added simultaneously.
Global Carbon Budget 2014
Quéré, C. Le; Moriarty, R. ; Andrew, R.M. ; Peters, G.P. ; Ciais, P. ; Friedlingstein, P. ; Jones, S.D. ; Sitch, S. ; Tans, P.P. ; Arneth, A. ; Boden, T.A. ; Bopp, L. ; Bozec, Y. ; Canadell, J.G. ; Chevallier, F. ; Cosca, C.E. ; Harris, I. ; Hoppema, Mario ; Houghton, R.A. ; House, J.I. ; Jain, A.K. ; Johannessen, T. ; Kato, E. ; Keeling, R.F. ; Kitidis, V. ; Klein Goldewijk, Kees ; Koven, C. ; Landa, C.S. ; Landschützer, P. ; Lenton, A. ; Lima, I.D. ; Marland, G. ; Mathis, J.T. ; Metzl, N. ; Nojiri, Y. ; Olson, A. ; Ono, T. ; Peters, Wouter ; Pfeil, B. ; Poulter, Benjamin ; Raupach, M.R. ; Regnier, P. ; Rödenbeck, C. ; Saito, S. ; Sailsbury, J.E. ; Schuster, U. ; Schwinger, J. ; Séférian, R. ; Segschneider, J. ; Steinhoff, T. ; Stocker, B.D. ; Sutton, A.J. ; Takahashi, T. ; Tilbrook, B. ; Werf, G.R. van der; Viovy, N. ; Wang, Y.P. ; Wanninkhof, R. ; Wiltshire, A. ; Zeng, N. - \ 2015
Eerste bioasfalt echt gerealiseerd in Zeeland
Jong, E. De; Landa, P. ; Verschuren, M. ; Gosselink, R.J.A. - \ 2015
Land + Water 2015 (2015)12. - ISSN 0926-8456 - p. 18 - 19.
Dit asfalt ruikt naar hout
Kasteren, J. van; Landa, P. ; Verschuren, M. ; Gosselink, R.J.A. - \ 2015
NRC 2015 (2015)14 nov..
Macroeconomic impacts of bioenergy production on surplus agricultural land—A case study of Argentina
Wicke, Birka ; Smeets, E. ; Tabeau, Andrzej ; Hilbert, Jorge ; Faaij, André - \ 2009
Renewable and Sustainable Energy Reviews 13 (2009)9. - ISSN 1364-0321 - p. 2463 - 2473.
This paper assesses the macroeconomic impacts in terms of GDP, trade balance and employment of large-scale bioenergy production on surplus agricultural land. An input–output model is developed with which the direct, indirect and induced macroeconomic impacts of bioenergy production and agricultural intensification, which is needed to make agricultural land become available for bioenergy production, are assessed following a scenario approach. The methodology is applied to a case study of Argentina. The results of this study reveal that large-scale pellet production in 2015 would directly increase GDP by 4%, imports by 10% and employment by 6% over the reference situation in 2001. When accounting for indirect and induced impacts, GDP increases by 18%, imports by 20% and employment by 26% compared to 2001. Agricultural intensification reduces but does not negate these positive impacts of bioenergy production. Accounting for agricultural intensification, the increase in GDP as a result of bioenergy production on surplus agricultural land would amount to 16%, 20% in imports and 16% in employment compared to 2001.
Buffel O’landa, Mozzarella, made in Nederland
Corstjens, J. ; Geraets, F. ; Vogels, P. - \ 2008
Animal Sciences Group
Italiaanse kaas uit Deurne : Buffel o Landa gaat buffelmelk verwerken tot mozzarella en die in Nederland
Vogels, P. ; Geraerts, F. ; Cortjens, J. - \ 2008
Boerderij/Veehouderij 2008 (2008)mei. - p. 30 - 30.
buffelmelk - buffels - mozzarella kaas - melkproducten - markten - buffalo milk - buffaloes - mozzarella cheese - milk products - markets
De veehouders in het bedrijf Buffel o Landa in Deurne gaan buffelmelk verwerken tot mozzarella en die in Nederland afzetten. Ook kijken de veehouders naar andere zuivelproducten die uit buffelmelk te maken zijn
Atmospheric CO2 modeling at the regional scale: an intercomparison of 5 meso-scale atmospheric models
Sarrat, C. ; Noilhan, J. ; Dolman, A.J. ; Gerbig, C. ; Ahmadov, R. ; Tolk, L.F. ; Meesters, A.G.C.A. ; Hutjes, R.W.A. ; Maat, H.W. ter; Pérez-Landa, G. ; Donier, S. - \ 2007
Biogeosciences 4 (2007)3. - ISSN 1726-4170 - p. 1115 - 1126.
broeikasgassen - kooldioxide - klimaatverandering - emissiereductie - modellen - greenhouse gases - carbon dioxide - climatic change - emission reduction - models - transport - fluxes
Atmospheric CO2 modeling in interaction with the surface fluxes, at the regional scale is developed within the frame of the European project CarboEurope-IP and its Regional Experiment component. In this context, five meso-scale meteorological models participate in an intercomparison exercise. Using a common experimental protocol that imposes a large number of rules, two days of the CarboEurope Regional Experiment Strategy (CERES) campaign are simulated. A systematic evaluation of the models is done in confrontation with the observations, using statistical tools and direct comparisons. Thus, temperature and relative humidity at 2 m, wind direction, surface energy and CO2 fluxes, vertical profiles of potential temperature as well as in-situ CO2 concentrations comparisons between observations and simulations are examined. This intercomparison exercise shows also the models ability to represent the meteorology and carbon cycling at the synoptic and regional scale in the boundary layer, but also points out some of the major shortcomings of the models.
The CarboEurope regional experiment strategy
Dolman, A.J. ; Noilhan, J. ; Durand, P. ; Sarrat, C. ; Brut, A. ; Piguet, B. ; Butet, A. ; Jarosz, N. ; Brunet, Y. ; Loustau, D. ; Lamaud, E. ; Tolk, L.F. ; Ronda, R. ; Miglietta, F. ; Gioli, B. ; Magliulo, V. ; Esposito, M. ; Gerbig, C. ; Körner, S. ; Glademard, P. ; Ramonet, M. ; Ciais, P. ; Neininger, B. ; Hutjes, R.W.A. ; Elbers, J.A. ; Macatangay, R. ; Schrems, O. ; Pérez-Landa, G. ; Sanz, J. ; Scholz, Y. ; Facon, G. ; Ceschia, E. ; Beziat, P. - \ 2006
Bulletin of the American Meteorological Society 87 (2006)10. - ISSN 0003-0007 - p. 1367 - 1379.
broeikasgassen - kooldioxide - klimaatverandering - meteorologie - frankrijk - greenhouse gases - carbon dioxide - climatic change - meteorology - france - boundary-layer budgets - atmospheric transport - hapex-mobilhy - co2 - carbon - surface - model - scale - flux - exchange
Quantification of sources and sinks of carbon at global and regional scales requires not only a good description of the land sources and sinks of carbon, but also of the synoptic and mesoscale meteorology. An experiment was performed in Les Landes, southwest France, during May¿June 2005, to determine the variability in concentration gradients and fluxes of CO2. The CarboEurope Regional Experiment Strategy (CERES; see also http://carboregional.mediasfrance.org/index) aimed to produce aggregated estimates of the carbon balance of a region that can be meaningfully compared to those obtained from the smallest downscaled information of atmospheric measurements and continental-scale inversions. We deployed several aircraft to concentration sample the CO2 and fluxes over the whole area, while fixed stations observed the fluxes and concentrations at high accuracy. Several (mesoscale) meteorological modeling tools were used to plan the experiment and flight patterns. Results show that at regional scale the relation between profiles and fluxes is not obvious, and is strongly influenced by airmass history and mesoscale flow patterns. In particular, we show from an analysis of data for a single day that taking either the concentration at several locations as representative of local fluxes or taking the flux measurements at those sites as representative of larger regions would lead to incorrect conclusions about the distribution of sources and sinks of carbon. Joint consideration of the synoptic and regional flow, fluxes, and land surface is required for a correct interpretation. This calls for an experimental and modeling strategy that takes into account the large spatial gradients in concentrations and the variability in sources and sinks that arise from different land use types. We briefly describe how such an analysis can be performed and evaluate the usefulness of the data for planning of future networks or longer campaigns with reduced experimental efforts.
Differential ability of genotypes of 2,4-Diacetylphloroglucinol-producing Pseudomonas fluorescens strains to colonize the roots of pea plants
Landa, B.B. ; Mavrodi, O.V. ; Raaijmakers, J.M. ; McSpadden Gardener, B.B. ; Thomashow, L.S. ; Weller, D.M. - \ 2002
Applied and Environmental Microbiology 68 (2002)7. - ISSN 0099-2240 - p. 3226 - 3237.
Indigenous populations of 2,4-diacetylphloroglucinol (2,4-DAPG)-producing fluorescent Pseudomonas spp. that occur naturally in suppressive soils are an enormous resource for improving biological control of plant diseases. Over 300 isolates of 2,4-DAPG-producing fluorescent Pseudomonas spp. were isolated from the rhizosphere of pea plants grown in soils that had undergone pea or wheat monoculture and were suppressive to Fusarium wilt or take-all, respectively. Representatives of seven genotypes, A, D, E, L, O, P, and Q, were isolated from both soils and identified by whole-cell repetitive sequence-based PCR (rep-PCR) with the BOXA1R primer, increasing by three (O, P, and Q) the number of genotypes identified previously among a worldwide collection of 2,4-DAPG producers. Fourteen isolates representing eight different genotypes were tested for their ability to colonize the rhizosphere of pea plants. Population densities of strains belonging to genotypes D and P were significantly greater than the densities of other genotypes and remained above log 6.0 CFU (g of root)-1 over the entire 15-week experiment. Genetic profiles generated by rep-PCR or restriction fragment length polymorphism analysis of the 2,4-DAPG biosynthetic gene phlD were predictive of the rhizosphere competence of the introduced 2,4-DAPG-producing strains.
Going places, staying home : rural-urban connections and the significance of land in Buhera district, Zimbabwe
Andersson, J.A. - \ 2002
Wageningen University. Promotor(en): N.E. Long; van Donge. - S.l. : s.n. - ISBN 9789058085535 - 175
arbeidsmobiliteit - migrantenarbeid - ruraal-urbane migratie - urbanisatie - plattelandsgemeenschappen - sociologie - etnografie - relaties tussen stad en platteland - stedelijke samenleving - zimbabwe - labour mobility - migrant labour - rural urban migration - urbanization - rural urban relations - urban society - rural communities - sociology - ethnography - zimbabwe - cum laude
This book consists of four articles containing detailed ethnographic studies of people who are commonly known as migrant workers.Conventional studies on rural-urban migration and urbanisation have often examined such people in either rural or urban social situations,analysing respectively the consequences of out-migration for the rural society and its agriculture-based economy,or the adoption of urbanised life styles in cities.As a consequence, such studies have tend to reproduce common oppositions associated with the distinction between the rural and the urban,such as traditional-modern, conservative-progressive,continuity-change,peasants-workers,etc. Oppositions that,at the same time,present us with a common development perspective on the relation between the urban and the rural -i.e.that of state- directed modernisation.This thesis on migrant workers travelling back and forth between the rural district of Buhera and Harare,Zimbabwe 's capital, takes issue with such oppositions in our thinking about development.The studies show that Buhera migrants do not live in two separate -rural and urban -social worlds.Rather,it is argued that this migrant society comprises of a single cultural space,stretching different geographical spaces -i.e.Buhera society has to be understood as translocal.
The method of enquiry adopted in the studies is best captured by the notion of travelling.Buhera migrants were followed both spatially and temporally - in their travels towards and within town,as well as back in time,to understand their history.As a consequence,it is possible to move beyond an image of a 'culture 'fragmented by mobility or moving between different - rural and urban -cultural spaces.To the Buhera migrants studied,distinctions between rural and urban social life do not seem to be important,let alone problematic.Not confined to a particular area,this society of migrants was understood as translocal,spanning different geographical spaces while at the same time constituting a single cultural space.Buhera as a geographical space remained nevertheless important,albeit not as the context of social life, constituting a cultural space or territory,but rather as a point of identification, evoking a sense of belonging.It is this 'being Buheran 'which the analyses in this book focus upon,revealing its significance for the ways in which people organise their livelihoods,thereby reproducing their Buheran identity.

Chapter 2
This chapter discusses the power of the state and its representatives to impose their self-produced categories of thought,arguing that this poses a major problem to the historiography of Zimbabwe,which has attributed the colonial state a dominant role in directing social change.Relying heavily on the colonial state 's own archival sources,historical analysis have often taken as unproblematic the relation between knowledge about,and control over, African societies as presented in these archival sources.This chapter challenges this hegemonic view of the colonial state in Zimbabwe,building upon the historical analysis of a rather marginal area.In the early colonial period the Buhera district was designated an African Reserve as white settlers had little interest in its dry and sandy soils.As a result of this lack of interest, historical sources on the area are largely confined to reports made by colonial officials.However,the reports do contain observations of local-level administrators that allow for a different interpretation of the state 's control over its subjects and its role in directing social change.Following the shifting biases in colonial policy discourse -from a preoccupation with the mobilisation of African labour to the modernisation of African land use -this paper shows how,with the expansion of state intervention in the area,Buhera society came to represent traditional African society.Yet,this image of Buhera in the 'controlled 'administrative order of colonial reports increasingly defied the reality of social life experienced on the ground.The historical analysis of Buhera district thus suggests a different perspective on the colonial state. Zimbabwean historiography has generally focused on areas that experienced dramatic confrontations between Europeans (settlers and administrators)and Africans -areas for which sufficient and well-classified archive material is available.Consequently,the role of the state tends to be overestimated, regional differences ignored,and the complexity of the African opposition to the colonial state oversimplified.

Chapter 3
In the academic debate on labour migration and urbanisation in Southern Africa the persistence of links between urban workers and people in rural areas has proved a pertinent issue.As is implied by the termlabour migrationeconomic forces have always been regarded as a major determinant of migratory behaviour.State-centred perspectives have dominated studies of rural-urban migration in Zimbabwe,where a restrictive legal regulated migration to urban centres during the colonial era in an attempt to prevent large numbers of Africans becoming permanent town dwellers.This ethnographic study of labour migrants in Harare originating from the Buhera district,however,shifts away from perspectives that reduce migratory behaviour to an effect of state intervention and/or economic forces.Such external forces are mediated by migrants 'networks that encompass both rural and urban localities.Rather than being only economically motivated, individual migrants 'participation in these networks has to be understood as an expression of a socio-cultural pattern in which rural identification and kinship ideology are of major importance.Viewing migration practices in this way -i.e.as observable outcomes of migrants 'socio-cultural dispositions -not only helps us to understand better the preferences that motivate economic behaviour but also challenges conventional perspectives in which the rural and urban are often viewed as distinct social worlds and the urbanisation process as part of a wider evolutionary development or transition towards a modern class society.

Chapter 4
Conflicts over land,a major theme in Zimbabwe 's rural history,are widely recognized as 'most serious 'in the densely populated Communal Areas. Pressure on land in these areas is considerable because of population growth and the segregationist policies of the colonial government that concentrated Africans on marginal lands.Land scarcity in the Communal Areas does not, however,mean that conflicts over land are always economically motivated.As the agricultural potential of land is often limited in Communal Areas,land cases may often be better understood as socially induced.This article on land disputes in the Murambinda area of Save Communal Land aims to elucidate the different meanings attached to land.It presents a situational analysis of a single case of land dispute and argues that land conflicts in the area are predominantly political power struggles.The litigation of land cases is dominated by village leaders (vanasabhuku)and largely takes place outside the state 's legal arena.Consequently,local state institutions responsible for land issues have a limited understanding of,and exercise little control over land issues.The findings of this study thus provide a different view in the ongoing debate on the need for tenurial reform in Zimbabwe 's Communal Areas,for they challenge the state 's administrative capacity to enforce such reform.

Recent studies of witchcraft and sorcery in Africa,have described this domain as an all powerful and inescapable discourse.The anthropological case study presented in this chapter,however,discloses a situation in which people contest the interpretation and narratives of this domain,and challenge its applicability.Focusing on the social practices in which the witchcraft discourse is produced,the approach taken is similar to anthropological approaches that have viewed the witchcraft discourse as a device to attribute meaning in situations of existential insecurity.In a society of migrant labourers working in Harare,but originating from the rural district of Buhera,Zimbabwe,such insecurities are all too real.Many people are confronted with HIV/AIDS- related illnesses and death -euphemistically called Henry the IV (HIV). However,witchcraft accusations do not become acute because of the AIDS pandemic -for which the 'modern 'biomedical episteme has few explanations or cures -but rather,are concurrent with it.The existential insecurities which give rise to witchcraft accusations in this society,originate within the kin- based networks which span rural and urban geographical areas.In contrast with contemporary studies analysing witchcraft in so-called 'modern 'contexts such as the city,the market and state politics,this chapter thus stresses the important link between witchcraft and kinship.It analyses which social relationships are prone to witchcraft allegations,and how the discourse is contested.Thus,it identifies how the witchcraft discourse is given a place relative to other social phenomena.It is shown that this migrant society the domain of the occult is not geographically localised -in a relatively closed rural society -but translocal.Migrants in town are not free from the witchcraft of their rural kin.
The perspective on rural-urban connections and the significance of land put forward in this thesis,is of wider significance.In the last chapter it is argued that received wisdom about the role of the land in understanding Zimbabwe 's history and contemporary politics may be limited since -as was elaborated for Buhera -it is based on the common oppositions associated with the rural- urban distinction.The discussion,which takes news reports on Zimbabwe 's political and economic crisis at the turn of the 21
stcentury as a starting point, critically reviews two common discourses on Zimbabwe's history and current crisis.One,the dominant discourse,focuses on the rural land as the source of wealth and development.This political economy-inspired discourse situates Zimbabwe 's crisis in theruraleconomy,in the highly uneven distribution of the best agricultural land.It stresses the productive value of land.The other discourse,which may be typified as a counter-discourse,presents us with a rather different image -i.e.that of an industrializing economy in decline. Blaming the state for its economic mismanagement and focusing exclusively on economic parameters of the current crisis,this discourse is of limited use for our understanding of the current political dynamic in which non-economic values of land play such an important role.As the studies in this thesis have shown,the stress on the economic value of land has,perhaps,prevented us from understanding the socio-cultural and political value of land in Zimbabwe.
The PHARUS Familiarization Programme
Rijckenberg, G.J. ; Smith, A.J.E. ; Broek, A.C. van den; Greidanus, H. ; Dekker, R.J. ; Kogels, J. ; Otten, M.P.G. ; Landa, H. ; Hesselmans, G.H.F.M. ; Pietersen, O. ; Booltink, H.W.G. ; Hoekman, D.H. ; Vissers, M.A.M. - \ 1998
Delft : BCRS - ISBN 9789054112587 - 137
landgebruik - classificatie - cartografie - remote sensing - wegen - detectie - radar - krop (van vogel) - land use - classification - mapping - roads - detection - crop
Hyperthermophilic redox biochemistry revisited: Em(T) profiles of rubredoxin and ferredoxin from Pyrococcus furiosus.
Hagen, W.R. ; Driessen, M.C.P.F. ; Hagedoorn, P.L. ; Bosch, M. van den; Landa, I. ; Arendsen, A.F. ; Silva, P.J. da; Wassink, H. ; Haaker, H. - \ 1998
In: 4th European Biological Inorganic Chemistry Conference, Seville, Spain (1998)
Hyperthermophilic redox chemistry: a re-evaluation.
Hagedoorn, P.L. ; Driessen, M.C.P.F. ; Bosch, M. van den; Landa, I. ; Hagen, W.R. - \ 1998
FEBS Letters 440 (1998). - ISSN 0014-5793 - p. 311 - 314.
Ecophysiology of 8 woody multipurpose species from semiarid northeastern Mexico.
Boerboom, J.H.A. ; Smits, M.P. ; Stienen, H. ; Reid, N. ; Landa, J. - \ 1990
In: Proc. Int. Symp. Forest tree physiology, E. Dreyer, G. Aussenac, M. Bonnet-Masimbert (eds.). Nancy, France, 1988. Ann. Sci. Forestières 46, suppl. (1989) 454s-458s
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