Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    '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.

    We have a manual that explains all the features 

    Records 1 - 20 / 21

    • help
    • print

      Print search results

    • export

      Export search results

    Check title to add to marked list
    Améliorer la prévention et la gestion des crises dans le secteur agricole de l'Union Européenne : Résumé Analytique
    Bergevoet, R.H.M. ; Chartier, Olivier ; Jongeneel, R.A. ; Pierre, Guillaume ; Wagenberg, C.P.A. van; Asseldonk, M.A.P.M. van; Selten, Marjolein ; Silvis, H.J. ; Martino, Giulia ; Sani, Irma - \ 2019
    EC - ISBN 9789276023616 - 14 p.
    Improving crisis prevention and management criteria and strategies in the agricultural sector : Executive summary
    Bergevoet, R.H.M. ; Chartier, Olivier ; Jongeneel, R.A. ; Pierre, Guillaume ; Wagenberg, C.P.A. van; Asseldonk, M.A.P.M. van; Selten, Marjolein ; Silvis, H.J. ; Martino, Giulia ; Sani, Irma - \ 2019
    EC - ISBN 9789276023609 - 12 p.
    Improving crisis prevention and management criteria and strategies in the agricultural sector : Final report
    Bergevoet, R.H.M. ; Chartier, Olivier ; Jongeneel, R.A. ; Pierre, Guillaume ; Wagenberg, C.P.A. van; Asseldonk, M.A.P.M. van; Selten, Marjolein ; Silvis, H.J. ; Martino, Giulia ; Sani, Irma - \ 2019
    EC - ISBN 9789276023623 - 182 p.
    Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2
    Koren, Gerbrand ; Schneider, Linda ; Velde, Ivar R. van der; Schaik, Erik van; Gromov, Sergey S. ; Adnew, Getachew A. ; Mrozek Martino, Dorota J. ; Hofmann, Magdalena E.G. ; Liang, Mao Chang ; Mahata, Sasadhar ; Bergamaschi, Peter ; Laan-Luijkx, Ingrid T. van der; Krol, Maarten C. ; Röckmann, Thomas ; Peters, Wouter - \ 2019
    Journal of Geophysical Research: Atmospheres 124 (2019)15. - ISSN 2169-897X - p. 8808 - 8836.
    O excess (ΔO) - carbon cycle - carbon dioxide (CO) - gross primary production (GPP) - mass-independent fractionation (MIF) - stable isotopes

    The triple oxygen isotope signature Δ17O in atmospheric CO2, also known as its “17O excess,” has been proposed as a tracer for gross primary production (the gross uptake of CO2 by vegetation through photosynthesis). We present the first global 3-D model simulations for Δ17O in atmospheric CO2 together with a detailed model description and sensitivity analyses. In our 3-D model framework we include the stratospheric source of Δ17O in CO2 and the surface sinks from vegetation, soils, ocean, biomass burning, and fossil fuel combustion. The effect of oxidation of atmospheric CO on Δ17O in CO2 is also included in our model. We estimate that the global mean Δ17O (defined as Δ17O = ln(δ17O+1)−λRL·ln(δ18O+1) with λRL = 0.5229) of CO2 in the lowest 500 m of the atmosphere is 39.6 per meg, which is ∼20 per meg lower than estimates from existing box models. We compare our model results with a measured stratospheric Δ17O in CO2 profile from Sodankylä (Finland), which shows good agreement. In addition, we compare our model results with tropospheric measurements of Δ17O in CO2 from Göttingen (Germany) and Taipei (Taiwan), which shows some agreement but we also find substantial discrepancies that are subsequently discussed. Finally, we show model results for Zotino (Russia), Mauna Loa (United States), Manaus (Brazil), and South Pole, which we propose as possible locations for future measurements of Δ17O in tropospheric CO2 that can help to further increase our understanding of the global budget of Δ17O in atmospheric CO2.

    Implementation of PROMETHEUS 4‐step approach for evidence use in EFSA scientific assessments: benefits, issues, needs and solutions
    Aiassa, Elisa ; Martino, Laura ; Barizzone, Fulvio ; Ciccolallo, Laura ; Garcia, Ana ; Georgiadis, Marios ; Guajardo, Irene Muñoz ; Tomcikova, Daniela ; Alexander, Jan ; Calistri, Paolo ; Gundert‐remy, Ursula ; Hart, Andrew David ; Hoogenboom, Ron Laurentius ; Messean, Antoine ; Naska, Androniki ; Navarro, Maria Navajas ; Noerrung, Birgit ; Ockleford, Colin ; Wallace, Robert John ; Younes, Maged ; Abuntori, Blaize ; Alvarez, Fernando ; Aryeetey, Monica ; Baldinelli, Francesca ; Barrucci, Federica ; Bau, Andrea ; Binaglia, Marco ; Broglia, Alessandro ; Castoldi, Anna Federica ; Christoph, Eugen ; Sesmaisons‐Lecarré, Agnes De; Georgiadis, Nikolaos ; Gervelmeyer, Andrea ; Istace, Frederique ; López‐Gálvez, Gloria ; Manini, Paola ; Maurici, Daniela ; Merten, Caroline ; Messens, Winy ; Mosbach‐Schulz, Olaf ; Putzu, Claudio ; Bordajandi, Luisa Ramos ; Smeraldi, Camilla ; Tiramani, Manuela ; Martínez, Silvia Valtueña ; Sybren, Vos ; Hardy, Anthony Richard ; Hugas, Marta ; Kleiner, Juliane ; Seze, Guilhem De - \ 2018
    EFSA Supporting Publications 15 (2018)4. - ISSN 2397-8325
    In 2014, the European Food Safety Authority (EFSA) started the PROMETHEUS (PROmoting METHods for Evidence Use in Scientific assessments) project to improve further and increase the consistency of the methods it uses in its scientific assessments. The project defined a set of principles for the scientific assessment process and a 4‐step approach (plan/carry out/verify/report) for their fulfilment, which was tested in ten case studies, one from each EFSA panel. The present report describes the benefits, issues, needs and solutions related to the implementation of the 4‐step approach in EFSA, identified in a dedicated workshop in October 2017. The key benefits of the approach, which was deemed applicable to all types of EFSA scientific assessment including assessments of regulated products, are: 1) increased ‘scientific value’ of EFSA outputs, i.e. the extent of impartiality, methodological rigour, transparency and engagement; 2) guarantee of fitness‐for‐purpose, as it implies tailoring the methods to the specificities of each assessment; 3) efficiency gain, since preparing a protocol for the assessment upfront helps more streamlined processes throughout the implementation phase; 4) innovation, as the approach promotes the pioneering practice of ‘planning before doing’ (well established in primary research) for broad scientific assessments in regulatory science; and 5) increased harmonisation and consistency of EFSA assessments. The 4‐step approach was also considered an effective system for detecting additional methodological and/or expertise needs and a useful basis for further defining a quality management system for EFSA's scientific processes. The identified issues and solutions related to the implementation of the approach are: a) lack of engagement and need for effective communication on benefits and added value; b) need for further advances especially in the field of problem formulation/protocol development, evidence appraisal and evidence integration; c) need for specialised expertise in the previous aspects; and specific needs for d) assessments of regulated products and e) outsourced projects.
    Marine and coastal ecosystem services on the science-policy-practice nexus : Challenges and opportunities from 11 European case studies
    Drakou, Evangelia G. ; Kermagoret, Charlène ; Liquete, Camino ; Ruiz-Frau, Ana ; Burkhard, Kremena ; Lillebø, Ana I. ; Oudenhoven, Alexander P.E. van; Ballé-Béganton, Johanna ; Rodrigues, João Garcia ; Nieminen, Emmi ; Oinonen, Soile ; Ziemba, Alex ; Gissi, Elena ; Depellegrin, Daniel ; Veidemane, Kristina ; Ruskule, Anda ; Delangue, Justine ; Böhnke-Henrichs, Anne ; Boon, Arjen ; Wenning, Richard ; Martino, Simone ; Hasler, Berit ; Termansen, Mette ; Rockel, Mark ; Hummel, Herman ; Serafy, Ghada El; Peev, Plamen - \ 2017
    International Journal of Biodiversity Science, Ecosystem Services & Management 13 (2017)3. - ISSN 2151-3732 - p. 51 - 67.
    Bottom-up approach - Data gaps - Ocean literacy - Pan-European approach - Policy relevance - Uncertainty
    We compared and contrasted 11 European case studies to identify challenges and opportunities toward the operationalization of marine and coastal ecosystem service (MCES) assessments in Europe. This work is the output of a panel convened by the Marine Working Group of the Ecosystem Services Partnership in September 2016. The MCES assessments were used to (1) address multiple policy objectives simultaneously, (2) interpret EU-wide policies to smaller scales and (3) inform local decision-making. Most of the studies did inform decision makers, but only in a few cases, the outputs were applied or informed decision-making. Significant limitations among the 11 assessments were the absence of shared understanding of the ES concept, data and knowledge gaps, difficulties in accounting for marine social-ecological systems complexity and partial stakeholder involvement. The findings of the expert panel call for continuous involvement of MCES ‘end users’, integrated knowledge on marine social-ecological systems, defining thresholds to MCES use and raising awareness to the general public. Such improvements at the intersection of science, policy and practice are essential starting points toward building a stronger science foundation supporting management of European marine ecosystems.
    Nomadic lifestyle of Lactobacillus plantarum revealed by comparative genomics of 54 strains isolated from different habitats
    Martino, Maria Elena ; Bayjanov, Jumamurat R. ; Caffrey, Brian E. ; Wels, Michiel ; Joncour, Pauline ; Hughes, Sandrine ; Gillet, Benjamin ; Kleerebezem, Michiel ; Hijum, Sacha A.F.T. van; Leulier, François - \ 2016
    Environmental Microbiology 18 (2016)12. - ISSN 1462-2912 - p. 4974 - 4989.

    The ability of bacteria to adapt to diverse environmental conditions is well-known. The process of bacterial adaptation to a niche has been linked to large changes in the genome content, showing that many bacterial genomes reflect the constraints imposed by their habitat. However, some highly versatile bacteria are found in diverse habitats that almost share nothing in common. Lactobacillus plantarum is a lactic acid bacterium that is found in a large variety of habitat. With the aim of unravelling the link between evolution and ecological versatility of L. plantarum, we analysed the genomes of 54 L. plantarum strains isolated from different environments. Comparative genome analysis identified a high level of genomic diversity and plasticity among the strains analysed. Phylogenomic and functional divergence studies coupled with gene–trait matching analyses revealed a mixed distribution of the strains, which was uncoupled from their environmental origin. Our findings revealed the absence of specific genomic signatures marking adaptations of L. plantarum towards the diverse habitats it is associated with. This suggests fundamentally similar trends of genome evolution in L. plantarum, which occur in a manner that is apparently uncoupled from ecological constraint and reflects the nomadic lifestyle of this species.

    Nearly complete genome sequence of Lactobacillus plantarum strain NIZO2877
    Martino, Maria Elena ; Bayjanov, Jumamurat R. ; Joncour, Pauline ; Hughes, Sandrine ; Gillet, Benjamin ; Kleerebezem, Michiel ; Siezen, Roland ; Hijum, Sacha A.F.T. van; Leulier, François - \ 2015
    Genome Announcements 3 (2015)6. - ISSN 2169-8287

    Lactobacillus plantarum is a versatile bacterial species that is isolated mostly from foods. Here, we present the first genome sequence of L. plantarum strain NIZO2877 isolated from a hot dog in Vietnam. Its two contigs represent a nearly complete genome sequence.

    Resequencing of the Lactobacillus plantarum strain WJL genome
    Martino, Maria Elena ; Bayjanov, Jumamurat R. ; Joncour, Pauline ; Hughes, Sandrine ; Gillet, Benjamin ; Kleerebezem, Michiel ; Siezen, Roland ; Hijum, Sacha A.F.T. van; Leulier, François - \ 2015
    Genome Announcements 3 (2015)6. - ISSN 2169-8287

    Lactobacillus plantarum strain WJL is a symbiont isolated from the Drosophila melanogaster gut. The genome of L. plantarum WJL, first sequenced in 2013, was resequenced and rescaffolded in this study. A combination of Sanger and Illumina sequencing allowed us to reduce the number of contigs from 102 to 13. This work contributes to a better understanding of the genome and function of this organism.

    Editorial: Regulation and organizational change in the governance of agri-food value chains
    Pascucci, S. ; Dries, L.K.E. ; Karantininis, K. ; Martino, G. - \ 2015
    British Food Journal 117 (2015)10. - ISSN 0007-070X
    editorial paper
    Functional ingredients produced by culture of Koliella antarctica
    Fogliano, Vincenzo ; Andreoli, Carlo ; Martello, Anna ; Caiazzo, Marianna ; Lobosco, Ornella ; Formisano, Fabio ; Carlino, Pier Antimo ; Meca, Giuseppe ; Graziani, Giulia ; Rigano, Vittoria Di Martino ; Vona, Vincenza ; Carfagna, Simona ; Rigano, Carmelo - \ 2010
    Aquaculture 299 (2010)1-4. - ISSN 0044-8486 - p. 115 - 120.
    Astaxanthin - Carotenoids - DHA - EPA - Koliella antarctica - Lutein - Omega-3

    Unicellular algae represent an interesting source of bioactive food ingredients. In this study, fatty acids and carotenoids of Koliella antarctica, a psychrophylic Antarctic unicellular alga, were investigated. K. antarctica was cultivated at different temperatures and harvested at the early exponential growth phase and at the late exponential growth phase. After 240 h, at the end of the late exponential growth phase, the cell biomass concentration was 1.1 g L- 1 at 10 °C while it was 2.2 g L- 1 at 15 °C. The lipid profile of K. antarctica was rich in polyunsaturated fatty acids (PUFA) particularly at the early exponential phase (50.8% of total fatty acids). The comparison of data obtained from algae cultivated at 10 °C and 15 °C, showed at 15 °C a strong increase in saturated lipids and a decrease in PUFA. At the same time the presence of EPA and DHA was marginally affected, with a percentage decrease around 15-20%. The productivity of EPA and DHA was similar at the two growth temperatures with maximum values of 0.6 mg L- 1 day- 1 and 1.3 mg L- 1 day- 1, at 10 and 15 °C, respectively. In K. antarctica cultures, the concentration of lutein and astaxanthin increased during growth up to 1.4 g per 100 g dry weight for both compounds. This is one of the highest concentrations reported in the literature for carotenoid production by unicellular algae, with a total carotenoid productivity of 3.1 mg L- 1 day- 1. Although optimization studies to increase K. antarctica biomass production were not yet carried out, data suggested that this alga is a promising source for low cost production of valuable bioactive compounds. The performance recorded at 15 °C suggested that it could be particularly suitable for outdoor cultivation during the winter season in the Mediterranean region.

    The poultry and pig sector in Argentina : husbandry practice and animal welfare
    Horne, P.L.M. van; Wagenberg, C.P.A. van; Winter, M.A. de; Hoste, R. ; Senesi, S.I. ; Barilatti, M.M. ; Daziano, M. ; Martino, L.D.C. ; Becerra, M.M.T. - \ 2010
    The Hague : LEI Wageningen UR (Report / LEI : Research area Agriculture & entrepreneurship ) - ISBN 9789086154098 - 79
    pluimveehouderij - pluimveebedrijf - varkenshouderij - dierenwelzijn - argentinië - dierhouderij - poultry farming - poultry industry - pig farming - animal welfare - argentina - animal husbandry
    This report gives an overview of the current husbandry and management practices in the poultry and pig sector in Argentina related to animal welfare. The research centered on a description of the broiler, layer and pig sector in Argentina, the regulatory framework in force in Argentina with respect to animal welfare and a survey on husbandry practice in the poultry and pig sector.
    Sweet cherry production in South Patagonia
    Cittadini, E.D. ; Sanz, C.E. ; Pugh, A.B. ; Peri, P.L. ; Szlápelis, E. ; Cárcamo, M.A. ; Kikuchi, N. ; Manavella, F.A. ; San Martino, L. ; Ñancucheo, J.A. ; Muñoz, M. ; Ridder, N. de; Keulen, H. van; Mundet, C.A. - \ 2008
    Acta Horticulturae 795 (2008). - ISSN 0567-7572 - p. 585 - 590.
    In South Patagonia, the total sweet cherry (Prunus avium L.) area has increased from 176 ha in 1997 to 507 ha in 2004, of which 232 ha are located in Los Antiguos (46°19¿ SL; 220 m elevation), 158 ha in the Lower Valley of Chubut River (LVCHR) (43°16¿ SL; 30 m elevation), 52 ha in Sarmiento (45°35¿ SL; 270 m elevation), 35 ha in Esquel (42°55¿ SL; 570 m elevation) and 30 ha in Comodoro Rivadavia (45°52¿ SL; 50 m elevation). The most common varieties are `Lapins¿, `Bing¿, `Newstar¿, `Sweetheart¿, `Stella¿, `Sunburst¿ and `Van¿ grafted on `Mahaleb¿, `Pontaleb¿, `SL 64¿, `Colt¿ or `Mazzard¿ rootstocks. Trees generally are drip-irrigated and planted at high densities, using training systems such as Tatura, central leader and modified vase (2700, 1100 and 1000 trees ha-1, respectively). Growers in Los Antiguos are more traditional, planting mainly as vase (400 to 1000 trees ha-1) or freestanding trees (280 trees ha-1) and irrigating by gravity (74% of the area). Only 4.4% of the area of Los Antiguos is frost protected, as growers rely strongly on the moderating effect of Lake Buenos Aires. Frost control systems are absent in Comodoro Rivadavia because the established orchards are located next to the sea, in an area with low risk of frost. The frost-protected area is 49% in Sarmiento, 35% in Esquel and 57% in LVCHR. Fruit are harvested from November (LVCHR) to the end of January (Los Antiguos and Esquel), and the harvest-only labour demand during the 2004/2005 season was 100,000 h. In that season, seven packinghouses exported 390 t (45% of the total production) to Europe. Most orchards have not yet reached their mature stage and new ones are being established. Therefore, fruit volumes will continue to increase and shortages of labour and packing facilities may become a constraint.
    Summary for Policymakers
    Barker, T. ; Bashmakov, I. ; Bernstein, L. ; Bogner, J. ; Bosch, P. ; Dave, R. ; Davidson, O. ; Fisher, B. ; Grubb, M. ; Gupta, S. ; Halsnaes, K. ; Heij, B.J. ; Kahn Ribeiro, S. ; Kobayashi, S. ; Levine, M. ; Martino, D. ; Masera Cerutti, O. ; Metz, B. ; Meyer, L. ; Nabuurs, G.J. ; Najam, A. ; Nakicenovic, N. ; Rogner, H.H. ; Roy, J. ; Sathaye, J. ; Schock, R. ; Shukla, P. ; Sims, R. ; Smith, P. ; Swart, R. ; Tirpak, D. ; Urge-Vorsatz, D. ; Dadi, Z. - \ 2007
    In: Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change / Metz, B., Davidson, O.R., Bosch, P.R., Dave, R., Meyer, L.A., Cambridge (UK) and New York (USA) : Cambridge University Press (Climate Change 2007 ) - ISBN 9780521880114 - p. 1 - 24.
    Effect of electrical conductivity, fruit pruning, and truss position on quality in greenhouse tomato fruit
    Fanasca, S. ; Martino, A. ; Heuvelink, E. ; Stanghellini, C. - \ 2007
    Journal of Horticultural Science and Biotechnology 82 (2007)3. - ISSN 1462-0316 - p. 488 - 494.
    antioxidant activity - salinity - cancer - yield - load
    The combined effects of electrical conductivity (an EC of 2.5 dS m-1 or 8 dS m-1 in the root zone) and fruit pruning (three or six fruit per truss) on tomato fruit quality were studied in a greenhouse experiment, planted in January 2005. Taste-related attributes [dry matter content (DM), total soluble solids content (SSC), titratable acidity (TA), glucose, fructose and citric acid content] and health-promoting attributes (lycopene, ß-carotene, vitamin C, and total antioxidant activity) of tomato fruits harvested on the vine from the fifth or tenth truss positions were determined. The quality of tomato fruits was improved by high EC. A high EC in the root zone increased the DM content, total SSC, TA, as well as glucose, fructose and citric acid contents. A significantly higher lycopene and ß-carotene content was also observed [on a fresh weight (FW) and dry weight (DW) basis] with a high EC in the root zone. The accumulation of different compounds that determine tomato fruit quality differed between the fifth and tenth truss. In particular, the lycopene content was reduced, whereas the ß-carotene content was increased in the tenth truss with respect to the fifth truss, most likely because of higher temperatures during ripening of the tenth truss. Fruit pruning increased fruit FW by 42% and positively influenced the DM content and total anti-oxidant activity, while a negative effect was observed on lycopene and citric acid contents (on a FW and DW basis). EC and fruit pruning both had a strong effect on fruit size; however, EC had a much stronger impact on taste and health-related fruit quality attributes. A small interaction between EC and fruit pruning was found for marketable yield, fructose and glucose content, fruit firmness, and P and Ca concentrations in fruits.
    Ecofisiologia y potencial productivo del cerezo
    Cittadini, E.D. - \ 2007
    In: El cultivo de cerezos en Patagonia Sur Technologia de manejo, empaque y comercialización / Cittadini, E., San Martino, L., Santa Cruz : INTA Instituto Nacional de Tecnologia Agropecuaria - ISBN 9789875212206 - p. 21 - 30.
    Implantación y conducción de montes de cerezo
    Pugh, B. ; Cittadini, E.D. - \ 2007
    In: El cultivo de cerezos en Patagonia Sur Technologia de manejo, empaque y comercialización / Cittadini, E.D., San Martino, L., Santa Cruz : INTA Instituto Nacional de Tecnologia Agropecuaria - p. 59 - 72.
    La situación actual del sector productor de cerezas an Patagonia Sur
    Cittadini, E.D. - \ 2007
    In: El cultivo de cerezos en Patagonia Sur Technologia de manejo, empaque y comercialización / Cittadini, E.D., San Martino, L., Santa Cruz : INTA Instituto Nacional de Tecnologia Agropecuaria - p. 15 - 20.
    El cultivo de cerezos en Patagonia Sur Technologia de manejo, empaque y comercialización
    Cittadini, E.D. ; San Martino, L. - \ 2007
    Santa Cruz : INTA Instituto Nacional de Tecnologia Agropecuaria - ISBN 9789875212206 - 200 p.
    Comparison between tower and aircraft-based eddy covariance fluxes in five European regions
    Gioli, B. ; Miglietta, F. ; Martino, B. De; Hutjes, R.W.A. ; Dolman, A.J. ; Lindroth, A. ; Schumacher, M. ; Sanz, M.J. ; Manca, G. ; Peressotti, A. ; Dumas, E.J. - \ 2004
    Agricultural and Forest Meteorology 127 (2004)1-2. - ISSN 0168-1923 - p. 1 - 16.
    atmospheric boundary-layer - carbon-dioxide - water-vapor - boreal forest - sensible heat - latent-heat - co2 - footprint - exchange - fluxnet
    Airborne eddy covariance measurements provide a unique opportunity to directly measure surface energy, mass and momentum fluxes at the regional scale. This offers the possibility to complement the data that are obtained by the ground-based eddy covariance networks and to validate estimates of the surface fluxes that can be obtained by means of satellite products and models. The overall accuracy and the reliability of airborne eddy covariance measurements have already been assessed in the past for different platforms. More recently an international collaboration between several research laboratories and a European aeronautical manufacturer led to the development of a new small environmental research aircraft, called the Sky Arrow ERA (Environmental Research Aircraft). This aircraft has been used in the framework of the European Research Project RECAB (Regional Assessment and Modelling of the Carbon Balance in Europe), that is part of the CarboEurope projects cluster, to measure surface mass and energy exchange at five different European locations. An extensive comparison between airborne and ground-based flux data at seven flux measurement sites, showed the overall matching between airborne and tower data. While friction velocity and latent heat flux estimates made by airborne and tower data were comparable at all sites and under whatever conditions, substantial and consistent underestimation of CO2 (28% on average) and sensible heat fluxes (35% on average) was observed. Differences in the aircraft and tower footprint and flux divergence with height explained most of the discrepancies.
    Check title to add to marked list
    << previous | next >>

    Show 20 50 100 records per page

    Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.