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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Smart Materials for Greenhouses
Hemming, S. ; Breugel, A.J. van; Stanghellini, C. ; Baeza Romero, Esteban ; Ruijs, M.N.A. - \ 2018
- 1 p.
Study on Producer Organisations and their activities in the olive oil, beef and veal and arable crops sectors
Cronin, E. ; Selten, M. ; Galen, M.A. van; Bijman, J. ; Viaggi, D. ; Arevalo, I. ; Smit, A.B. ; Ruijs, M.N.A. ; Meulen, B.M.J. van der; Vollaro, M. - \ 2018
Brussels : European Union - ISBN 9789279859038 - 163
The ‘Study on Producer Organisations and their activities in the olive oil, beef and veal and arable crops sectors’ aims to deliver an analysis of producer organisations from these three sectors. The analysis is mainly based on a survey conducted for a representative sample of 203 POs and 23 APOs. The sampling of the surveyed organisations builds on an inventory of existing organisations in the 28 Member States. The study reveals that there are many more non-recognised POs than recognised POs: there are estimated to be over five times as many non-recognised POs as there are recognised POs. The survey results confirm that producer organisations engaged in commercial activities also carry out other potentially “efficiency enhancing activities” (i.e. organisation of quality control, distribution and transport, input procurement, packaging, waste management etc.). The most important perceived benefits for the farmers include (i) market and price stability, (ii) reduced costs and economies of scale, (iii) higher price and ensuring a fair standard of living for the members and (iv) improved market access. The activities of producer organisations are widely perceived by survey respondents as contributing positively to CAP objectives.
Kostenraming van exoten voor tweede update van de Unielijst (EU-1143/2014)
Valk, O.M.C. van der; Dijk, C.J. van; Rijk, P.J. ; Ruijs, M.N.A. - \ 2018
Wageningen : Wageningen Economic Research (Wageningen Economic Research nota 2018-033) - 39
Natural capital accounting for the sustainable development goals : current and potential uses and steps forward
Ruijs, Arjan ; Heide, Martijn van der; Berg, Jolanda van den - \ 2018
The Hague : PBL Netherlands Environmental Assessment Agency (Policy study ) - 36
De Nederlandse landbouwexport in breder perspectief
Ramaekers, P. ; Jukema, G.D. ; Ruijs, M.N.A. - \ 2018
In: De Nederlandse landbouwexport 2017 / Raemakers, Pascal, Dolman, Mark, Jukema, Gerben, Den Haag : Centraal Bureau voor de Statistiek - ISBN 9789035724174 - p. 85 - 102.
De Nederlandse handel in landbouwgoederen
Ramaekers, P. ; Jukema, G.D. ; Ruijs, M.N.A. - \ 2018
In: De Nederlandse landbouwexport 2017 / Raemakers, Pascal, Dolman, Mark, Jukema, Gerben, Den Haag : Centraal Bureau voor de Statistiek - ISBN 9789035724174 - p. 11 - 36.
Transparantie in de varkensketen
Baltussen, W.H.M. ; Ruijs, M.N.A. ; Bondt, N. ; Haaster-de Winter, M.A. van; Hoste, R. ; Immink, V.M. ; Kornelis, M. ; Kortstee, H.J.M. ; Splinter, G.M. - \ 2017
Wageningen : Wageningen Economic Research (Wageningen Economic Research rapport 2017-039) - ISBN 9789463432337 - 64
Prospects of hydroponics and protected cultivation in semi-arid regions piloted in Algeria
Os, E.A. Van; Bruins, M.A. ; Ruijs, M.N.A. ; Sapounas, A. ; Speetjens, B. - \ 2017
In: ICESC2015 International Society for Horticultural Science (Acta Horticulturae ) - ISBN 9789462611726 - p. 65 - 71.
Multispan greenhouse - Rainwater - Single tunnel - Soilless cultivation - Water use
Algeria is used as an example for exploring and analysing the prospects of hydroponics and protected cultivation within the horticultural sector in a semi-arid climate. First step is to analyse the present horticultural situation (protected and open field cultivation, technology and knowledge level) and its local conditions such as climate (temperature, global radiation, humidity, rainfall), natural resources and market situation (segmentation and price level). According to the outcome the second step will be the improvement of the present situation with (limited) investments for growers, and a third step to suggest required changes for a higher technology and knowledge level. All need to be discussed with local parties. In Algeria the technology level is mainly low (single tunnels with soil grown crops and no climate control), while there is a wish to start with multispan greenhouses. Hydroponics was only done at a low level, but especially in multispan greenhouses there was more experience. Looking to the climate it appeared, in a model approach, that in the coastal area (Algiers) the single tunnel greenhouses are doing well, while in the desert area Biskra) the temperatures were soon too high resulting in a very short growing season/The ventilation capacity of the single tunnel is the limiting factor. At a higher technology level the multispan greenhouse with closed plastic cover is better than the open Canarian greenhouse as rainfall may be abundant in the growing season along the coast, while in the desert area without hardly any rainfall the Canarian type is a cheaper solution. Hydroponic cultivation in the coastal area can be improved by collecting rainwater in both single tunnel and multispan greenhouses. Now often poor quality groundwater is being used, while about 500 mm of rain falls in the growing season and stays unused. For the desert area hydroponics starts with desalination of the groundwater. Improvements in a higher ventilation rate in single tunnels are paid back within one year and between 3 and 4 years if additional pad and fan cooling will be used. In multispan greenhouses a high ventilation rate does not give additional investments and, consequently, no payback period, while the use of pad and fan cooling results in a payback period of 3.8 years in Algiers and 2.7 years in Biskra.
Value chain analysis of (greenhouse) vegetables in Lebanon : Strengthening Lebanese Water and Agriculture Sector Component 5: Adaptive greenhouse; Work package
Ruijs, Marc - \ 2017
Wageningen : Wageningen Economic Research (Wageningen Economic Research memorandum 2017-102) - 27
Effects of bio-based residue amendments on greenhouse gas emission from agricultural soil are stronger than effects of soil type with different microbial community composition
Ho, Adrian ; Ijaz, Umer Z. ; Janssens, Thierry K.S. ; Ruijs, Rienke ; Kim, Sang Yoon ; Boer, Wietse de; Termorshuizen, Aad ; Putten, Wim H. van der; Bodelier, Paul L.E. - \ 2017
Global change biology Bioenergy 9 (2017)12. - ISSN 1757-1693 - p. 1707 - 1720.
16S rRNA gene diversity - C : N ratio - Compost - Global warming potential - Litter bag - Nitrous oxide - Soil respiration

With the projected rise in the global human population, agriculture intensification and land-use conversion to arable fields is anticipated to meet the food and bio-energy demand to sustain a growing population. Moving towards a circular economy, agricultural intensification results in the increased re-investment of bio-based residues in agricultural soils, with consequences for microbially mediated greenhouse gas (GHG) emission, as well as other aspects of soil functioning. To date, systematic studies to address the impact of bio-based residue amendment on the GHG balance, including the soil microorganisms, and nutrient transformation in agricultural soils are scarce. Here, we assess the global warming potential (GWP) of in situ GHG (i.e., CO2, CH4, and N2O) fluxes after application of six bio-based residues with broad C : N ratios (5-521) in two agricultural soils (sandy loam and clay; representative of vast production areas in north-western Europe). We relate the GHG emission to the decomposability of the residues in a litter bag assay and determined the effects of residue input on crop (common wheat) growth after incubation. The shift in the bacterial community composition and abundance was monitored using IonTorrentTM sequencing and qPCR, respectively, by targeting the 16S rRNA gene. The decomposability of the residues, independent of C : N ratio, was proportional to the GWP derived from the GHG emitted. The soils harbored distinct bacterial communities, but responded similarly to the residue amendments, because both soils exhibited the highest mean GWP after addition of the same residues (sewage sludge, aquatic plant material, and compressed beet leaves). Our results question the extent of using the C : N ratio alone to predict residue-induced response in GHG emission. Taken together, we show that although soil properties strongly affect the bacterial community composition, microbially mediated GHG emission is residue dependent.

Centre of Excellence in Horticulture of Agadir : inception report
Stanghellini, Cecilia ; Baeza Romero, Esteban ; Ruijs, Marc - \ 2017
Wageningen : Wageningen Economic Research (Wageningen Economic Research memorandum 2017-041) - 44
This report is the result of the inception phase of a project aiming at a Centre of Excellence in Horticulture (CEH) at the Complex Horticole d’Agadir (CHA) of the Institut Agronomique et Véterinaire Hassan II. The project is commissioned by the Dutch Ministry of Foreign Affairs and financed by The Netherlands Enterprise Agency. Wageningen University & Research (WUR) has implemented the project in coordination with the Complex Horticole d’Agadir. The objective of the inception phase is to draft a scientific programme for the CEH and consists of the following components: The development of a 5-year scientific programme in a participatory process, involving all relevant stakeholders. The identification of possible Dutch involvement in the execution of the scientific programme, including action plans, planning and budget estimations. The identification of design parameters of a greenhouse complex suitable for research, demonstration and training as needed for the proper execution of the scientific programme. The inception report is considered as a consultancy activity and covers two parts: Conceptual design of a demonstration and research greenhouse in the region of Agadir, Morocco Scientific and education programme of the Centre of Excellence in Horticulture of Agadir.
Van dominee tot koopman? : Habitatbanking in Nederland
Gorissen, M.M.J. ; Heide, C.M. van der; Schaminée, J.H.J. ; Ruijs, A. - \ 2017
Wageningen : Wageningen Economic Research (Wageningen Economic Research rapport 2017-030) - ISBN 9789463431026 - 116
This report focuses on whether voluntary nature compensation has added value for biodiversity in the
Netherlands, and on whether habitat banking could be a supplement to the existing Dutch system of
mandatory nature compensation. In essence, habitat banking is the realisation of nature in exchange
for ‘rights’, which are subsequently traded and bought by parties who wish to compensate for their
detrimental effect on nature. The Netherlands does not have any practical experience with habitat
banking. It is recommended to facilitate room for learning and experimentation for habitat banking in
pilot areas. The required various instruments and frameworks are elaborated in this report.
Nederlandse handel in agrarische producten
Ruijs, M.N.A. ; Jukema, G.D. - \ 2017
Wageningen University & Research - 10 p.
Agrarische export van Nederland in 2016 stijgt en het handelsoverschot neemt toe Uit ramingen1 blijkt dat de Nederlandse agrarische export, inclusief wederuitvoer, in 2016 stijgt met 4,4% naar € 85 mld. Zowel de uitvoer van Nederlandse makelij als de wederuitvoer namen toe. De import van agrarische producten stijgt minder sterk (1,6%) dan de export en komt uit op € 57,1 mld. Het aandeel van Duitsland in de totale Nederlandse agrarische export blijft in 2016 stabiel op ruim 25%. Het handelsoverschot van agrarische producten neemt toe in 2016 met € 2,7 mld. naar € 27,9 mld. en heeft hiermee een aandeel van 55% in de totale handelsbalans van Nederland. Het aandeel van agrarische producten in de totale Nederlandse exportwaarde is in 2016 gestegen met 0,8%-punten naar 19,9%. Dit is mede het gevolg van een groeiende export van landbouwproducten bij een gelijkblijvende totale Nederlandse exportwaarde. Het totale Nederlandse handelsoverschot stijgt daardoor naar verwachting in 2016 naar € 51,1 mld. (€ 44,1 mld. in 2015). Nederland blijft in 2015 na de Verenigde Staten de belangrijkste exporteur van agrarische producten in de wereld.
Bouwstenen voor beleid duurzame landbouw : de rol, het instrumentarium en de monitoringstools van de provincie Noord-Holland
Dolman, M.A. ; Reijs, J.W. ; Ruijs, M.N.A. ; Smit, A.B. ; Turenhout, M.N.J. - \ 2016
Wageningen : LEI Wageningen UR (Nota / LEI Wageningen UR 2016-019) - 57
Biomassa voor de energievoorziening van tuinbouwclusters
Zwart, H.F. de; Ruijs, M.N.A. ; Visser, H.J.M. - \ 2016
Bleiswijk : Wageningen UR Glastuinbouw (Rapport GTB 1393) - 34 p.
bio-energie - glastuinbouw - haalbaarheidsstudies - economische haalbaarheid - warmte - kooldioxide - elektriciteit - biomassa - biobased economy - biochar - verbranding - opwekking van elektriciteit - warmteproductie - bioenergy - greenhouse horticulture - feasibility studies - economic viability - heat - carbon dioxide - electricity - biomass - combustion - electricity generation - heat production
Biomass combustion in combination with a cluster of greenhouses to provide heat, CO2 and electricity can provide a partly solution to the sustainability of the horticultural sector. A biomass gasification plant could also provide valuable biochar, the result of partial combustion of biocarbon. This was shown to have attractive characteristics to be used in high quality potting soil. Despite the high value of the biochar (contributing for 16% of the income from the plant), the economic feasibility of a biomass combustion plant depends heavily on governmental subsidies (SDE +). When the developed technology is used on a practical scale, a biomass plant of 8 MW thermal power and 1.4 MW of electrical power is a sound size. Such a plant fits well with a horticultural cluster of 15 hectares, consisting of 6 ha Tomato, 6 ha Pepper and 3 hectares of Chrysanthemum. The biomass plant produces over 91% of the heating and 95% of the CO2 requirement and 67% of the electricity counsumed. However during winter a lot of electricity will have to be bought, which is compensated with selling to the public grid in summer. The biomass combustion plant will mainly run on biomass is supplied from elsewhere. The biomass from the local cluster covers only 0.3% of the combusted amount. If all available biomass from Netherlands territory would be used to heat greenhouses about 20% of greenhouse industry could make use of system like described in this report.
Verhoging van energie-efficiency bij intensieve glastuinbouw productiesystemen : ontwikkeling van high-tech sensorsystemen voor monitoring en besturing van energiezuinige kassen: Fibre Bragg glasvezelsensoren
Balendonck, J. ; Janssen, H.J.J. ; Zwart, H.F. de; Schriek, L. ; Toet, P. ; Bezemer, R.A. ; Ruijs, M.N.A. - \ 2016
Bleiswijk : Wageningen UR Glastuinbouw (Rapport GTB 1392) - 78 p.
teelt onder bescherming - kasgewassen - kassen - intensieve productie - energiebesparing - sensors - temperatuur - relatieve vochtigheid - protected cultivation - greenhouse crops - greenhouses - intensive production - energy saving - temperature - relative humidity
Wageningen UR Greenhouse Horticulture and TNO conducted a study on the application of Fibre Bragg optic sensors to measure temperature and relative humidity in greenhouses at high spatial density. Sensors, incorporated in an experimental enclosure, were evaluated under practical conditions in a greenhouse at Bleiswijk (NL). Their performance appeared to be similar to that of existing wireless electronic sensors. In order to save energy when using their heating, growers may so obtain relative humidity at higher spatial density and grow at a higher average humidity level. Sensors indicate at an early stage if there is condensation and consequently a higher risk on diseases somewhere in the greenhouse. Rule of thumb is that every percent increase in the humidity will yield about 3.5% of energy or 1 m³ natural gas equivalents. In addition to energy saving, investing in a distributed monitoring network also has an economic advantage. Another advantage is that fiber-optic sensor networks can be extended to larger areas and with other sensor types at little more costs. However, little research and no practical experience is gained with fiber optic sensors in greenhouses. More research is still needed in order to arrive at a system ready for practice.
Milieu dossier : de (on)schatbare waarde van natuurlijk kapitaal
Ruijs, Arjan ; Heide, C.M. van der - \ 2016
Milieu : opinieblad van de Vereniging van Milieuprofessionals 22 (2016)3. - ISSN 1873-5436 - p. 36 - 40.
Het bepalen van de juiste waarde van natuurlijk kapitaal is een moeilijke aangelegenheid. Waarderingsstudies geven natuurbeleidsmakers economische argumenten om natuur te beschermen tegen verstorende invloeden vanuit de maatschappij. Veel minder aandacht is er vooralsnog voor natuurwaardering ten behoeve van een duurzame benutting van natuurlijk kapitaal. Voorgestelde investeringsbeslissingen en beleidsmaatregelen hebben nog vaak een blinde vlek voor de mogelijkheden die natuurlijk kapitaal biedt bij het oplossen van maatschappelijke opgaves. Natuurwaardering kan hier verandering in brengen. Deze benaderingswijze maakt zichtbaar hoe benutting van natuur een verbindend concept kan zijn.
Ruimtelijke verdiencapaciteiten Greenport Westland-Oostland
Schans, J.W. van der; Vader, J. ; Ruijs, M.N.A. ; Bergen, Jago van; Kolpa, Evert ; Aaftink, Rutger ; Janssen, Bernadette ; Boddeke, Jorick - \ 2016
Van Bergen Kolpa Architecten - 59 p.
Greenport Westland Oostland, tuinbouw, handelingsperspectief - zuid-holland - westland - beleidsondersteuning - tuinbouw - glastuinbouw - gebiedsontwikkeling - marketingbeleid - policy support - horticulture - greenhouse horticulture - area development - marketing policy
Dit ruimtelijk perspectief voor nieuwe verdiencapaciteiten geeft aan welke ontwikkelingen in de Greenport Westland-Oostland als structurerend kunnen worden gezien en leidend zijn voor het handelen van de overheden in de Greenport Westland-Oostland. Dit perspectief geeft input aan het strategisch handelingsperspectief Greenport Westland-Oostland, zoals dit door Provincie en betrokken andere overheden ontwikkeld wordt.
Nederlandse handelsbalans agrarische producten
Ruijs, M.N.A. ; Jukema, G.D. - \ 2016
LEI Wageningen UR (Factsheet / LEI Wageningen UR 2016-012a) - 4 p.
handelsbalans - landbouwproducten - export - nederland - balance of trade - agricultural products - exports - netherlands
Uit ramingen1 blijkt dat de Nederlandse agrarische export, inclusief wederuitvoer, in 2015 stijgt met 0,9% naar € 82,4 mld. De import van agrarische producten zal sterker stijgen (5,9%) dan de export en komt uit op € 56,1 mld. Het aandeel van Duitsland in de totale Nederlandse agrarische export in 2015 daalt met 0,1% naar 25,3%. Het totale Nederlandse handelsoverschot daalt naar verwachting in 2015 naar € 46,3 mld. (€ 51 mld. in 2014). Het handelsoverschot van agrarische producten neemt in 2015 af met € 2,4 mld. naar € 26,4 mld.
Nieuwe verdienmodellen voor de Innovatie en Demonstratie Centra
Ruijs, M.N.A. - \ 2016
Bleiswijk : WageningenUR Glastuinbouw (Rapport GTB 1386) - 36 p.
glastuinbouw - demonstratiebedrijven, landbouw - zuid-holland - innovaties - bedrijfsvoering - financiële ondersteuning - toegepast onderzoek - greenhouse horticulture - demonstration farms - innovations - management - financial support - applied research
Within the project ‘Knowledge and Innovation IDC Westland- Oostland’ Wageningen UR Greenhouse Horticulture examines which alternative earning models are suitable for the Innovation and Demonstration Centre (IDC) in order to be less dependent on government contribution. There are various earning models, additional activities and governance issues identified, which could increase the continuity perspective of IDC. Nevertheless, representatives of the IDC and Greenport Westland-Oostland believe anyhow that public financing is desirable for knowledge exchange and dissemination. The IDCs are recommended to examine the value of the models further for their situation. The extent to which earning models can be successful for IDC may vary depending on design (thematic / sectoral), ranking in core activities and affiliation with the agenda of the private sector.
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