Employee
 | Chris J. Koopmans PhDHead of Science and Business developmentT: +31(0)343 523860 (General) |
Publication(s) by Koopmans
Articles in scientific journals (2)
Proceedings etc. (22)
Brochures, books & reports (40)
Specialist journal articles, leaflets, newsletters, etc (22)
Scientific publications |
 Erisman, J.W., N.J.M. van Eekeren, J. de Wit, C.J. Koopmans, W.J.M. Cuijpers, N. Oerlemans and B.J. Koks. 2016. Agriculture and biodiversity: a better balance benefits both. AIMS Agriculture and Food. 1(2):157-174. DOI: 10.3934/agrfood.2016.2.157  Download full text pdf, 1,1 MB; opens in new window More information |
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 Koopmans, C.J. and J.G. Bokhorst. 2002. Nitrogen mineralisation in organic farming systems: a test of the NDICEA model. Agronomie. 22(7-8):855-862. DOI: 10.1051/agro:2002046 Download full text pdf, 2,2 MB; opens in new window More information |
Proceedings etc. |
 Koopmans, C.J., K. van Veluw and F. Wijnands. 2014. Participatory development as a way to innovations: five key elements for success. p. 791-794. In: 4th ISOFAR Scientific Conference. Istanbul, Turkey. 13-15 oktober 2014. Download full text pdf, 330 kB; opens in new window More information |
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 Rietberg, P.I., G.J.H.M. van der Burgt, L. Talgre, V. Eremeev, F.X. Sans, W. Sukkel, M. Grosse, T. Haase, A. Berner, P. Mäder, K. Willekens, B. van Gils, L. Delanote, A. Beekman, J. Peigné, C. David and C.J. Koopmans. 2014. Improving nitrogen management in reduced tillage systems by use of green manures and appropriate off-farm inputs: results of TILMAN-ORG. p. 807-810. In: 4th ISOFAR Scientific Conference. Istanbul, Turkey. 13-15 oktober 2014. Download full text pdf, 400 kB; opens in new window More information |
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 Burgt, G.J.H.M. van der, N.J.M. van Eekeren, J. Scholberg and C.J. Koopmans. 2013. Lucerne (Medicago sativa) or grass-clover as cut-and-carry fertilizers in organic agriculture. p. 123-125. In: EGF - The Role of Grasslands in a Green Future. Akureyri, Iceland. 26 June 2013. Download full text pdf, 290 kB; opens in new window More information |
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| Koopmans, C.J., M.M. Bos and B. Luske. 2011. Resilience to a changing climate: carbon stocks in two organic farming systems in Africa. p. 273-276. In: Organic is Life - Knowledge for Tomorrow: Third Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR). Namyangju, Korea. 28 September - 1 October 2011. Download full text pdf, 100 kB; opens in new window More information |
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| Burgt, G.J.H.M. van der, J. Scholberg and C.J. Koopmans. 2011. Developing novel farming systems: effective use of nutrients from cover crops in intensive Organic Farming. p. 32-35. In: Organic is Life - Knowledge for Tomorrow. Proceedings of the Third Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR). Namyangju, Korea. 28 September - 1 October 2011. Download full text pdf, 140 kB; opens in new window More information |
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| Eekeren, N.J.M. van, J.G. Bokhorst, L. Brussaard and C.J. Koopmans. 2011. Effect of grass-clover on the ecosystem services soil structure maintenance and water regulation. p. 44-47. In: Organic is Life - Knowledge for Tomorrow. Proceedings of the Third Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR). Namyangju, Korea. 28 September - 1 October 2011. Download full text pdf, 110 kB; opens in new window More information |
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| Koopmans, C.J. and F.W. Smeding. 2008. A Conceptual Framework for Soil management and its effect on Soil Biodiversity in Organic and Low Input Farming. In: 16th IFOAM Organic World Congress. Modena, Italy. June 16-20, 2008. Download full text pdf, 30 kB; opens in new window More information |
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| Koopmans, C.J., M. Zanen and J.G. Bokhorst. 2008. Organic fertilisers of the MAC trial and their impact on soil quality, environment and climate change. p. 67-69. In: The 5th International Scientific Conference on Sustainable Farming Systems - ECOMIT. Piestany, Slovakia. November 5-7, 2008. Download full text pdf, 1,5 MB; opens in new window More information |
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| Zanen, M. and C.J. Koopmans. 2008. Improving Soil Structure and Nitrogen Use Efficiency by GPS-controlled Precision Tillage Technology in Organic Farming. In: Cultivate the future; 16th IFOAM organic world congress. Modena, Italy. June 16-20, 2008. Download full text pdf, 50 kB; opens in new window More information |
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 Zanen, M., J.G. Bokhorst and C.J. Koopmans. 2008. Soil fertility and biodiversity effects from organic amendments in organic farming. p. 94-97. In: Second scientific conference of the International Society of Organic Agricultural Research (ISOFAR). Modena, Italy. 18-20 June 2008. Download full text pdf, 33 kB; opens in new window More information |
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| Koopmans, C.J. and M. Zanen. 2007. Organic Soil Management: Impacts on Yields, Soil Quality and Economics. In: 3 rd QLIF Congress. Hohenheim. 20-23 March 2007. Download full text pdf, 27 kB; opens in new window More information |
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| Koopmans, C.J. and G.J.H.M. van der Burgt. 2005. NDICEA as a user friendly model tool for crop rotation planning in organic farming. p. 534-537. In: the First Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR): Researching sustainable systems. Adelaide, Australia. 21-23 september 2005. More information |
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| Koopmans, C.J. and M. Zanen. 2005. Nitrogen efficiency in organic farming using a GPS precision farming technique. p. 56-59. In: First Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR): Researching Sustainable Systems. Adelaide, Australia. 21-23 september 2005. More information |
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| Cuijpers, W.J.M., W. Voogt and C.J. Koopmans. 2005. Balancing Fertilization Strategy with Crop Requirements in Organic Greenhouse Cultivation of Sweet Pepper. p. 513-516. In: First Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR): Researching Sustainable Systems. Adelaide, Australia. 21-23 september 2005. More information |
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| Cuijpers, W.J.M., F.W. Smeding, J. Amsing, J. Potsma and C.J. Koopmans. 2005. Effect of Organic Fertilizers on Regeneration of Biodiversity after Soil Steaming in Organic Glasshouses. p. 160-163. In: the First Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR). Adelaide, Australia. 21-23 september 2005. More information |
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| Koopmans, C.J., E. Heeres and J.G. Bokhorst. 2001. Nitrogen mineralization in organic farming systems: validation of the NDICEA model. p. 403-404. In: 11th Nitrogen workshop. Reims, France. 9-12 september 2001. More information |
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| Koopmans, C.J., E. Heeres and W. Voogt. 2001. Optimising manuring practices in organic greenhouses in the Netherlands. p. 309-310. In: 11th Nitrogen workshop. Reims, France. 9-12 september 2001. More information |
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| Heeres, E., J.G. Bokhorst and C.J. Koopmans. 2001. Compost and manure: a source of value. p. 101-102. In: 11th Nitrogen workshop. Reims, France. 9-12 september 2001. More information |
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| Koopmans, C.J. and J.G. Bokhorst. 2000. Optimising organic farming systems: nitrogen dynamics and long-term soil fertility in arable and vegetable production systems in the Netherlands. p. 66-72. In: 13th IFOAM Scientific Conference. Basel, Switserland. More information |
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| Koopmans, C.J. and J.G. Bokhorst. 2000. Organic farming systems: effects on C-N pools and processes. p. 258. In: Annual meeting abstracts SSSA. Minneapolis, Minnesota. Nov 5-9, 2000. More information |
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| Koopmans, C.J. and J.G. Bokhorst. 2000. Tools and strategies to improve highly intensive organic vegetable production in de Netherlands. p. 82. In: Annual meeting abstracts SSSA. Minneapolis, Minnesota. Nov 5-9, 2000. More information |
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| Koopmans, C.J., J.G. Bokhorst, C. Bloemhard and W. Voogt. 2000. Organic Greenhouses and Sustainability. p. 212. In: 13th IFOAM Scientific Conference. 2000. More information |
Brochures, books & reports |
 Koopmans, C.J. and J. Bloem. 2018. Soil quality effects of compost and manure in arable cropping: Results from using soil improvers for 17 years in the MAC trial. Rep. 2018-001 LbP. Louis Bolk Instituut, Bunnik. 40 p. Download full text pdf, 0,77 MB; opens in new window More information |
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 Koopmans, C.J., J.W. Erisman, M. Zanen and B. Luske. 2017. Biodiverse akkerbouw: Verkenning van indicatoren voor agrobiodiversiteit in de akkerbouw. Louis Bolk Instituut, Bunnik. 44 p. Download full text pdf, 0,66 MB; opens in new window More information |
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 Battjes-Fries, M.C.E., L.P.L. van de Vijver, M.C. Jong and C.J. Koopmans. 2017. Impact biologische boodschappenmand. Rep. 2017-015 VG. Louis Bolk Instituut, Driebergen. 48 p. Download full text pdf, 0,91 MB; opens in new window More information |
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 Koopmans, C.J. and A. Zwijnenburg. 2015. Safe and sustainable applications of waste in arable agriculture. (In Dutch, with English abstract.). Louis Bolk Instituut, Driebergen. 28 p. Order Price: €0.00; Order code:2015-003 LbP; opens in new window Download full text pdf, 1,3 MB; opens in new window More information |
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 Koopmans, C.J., J.G. Bokhorst, C. ter Berg and N.J.M. van Eekeren. 2015. Soil Signals: A practical guide to a fertile soil. Roodbond, Zutphen. 96 p. More information |
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 Koopmans, C.J., M. Zanen and C. ter Berg. 2015. Soil Scan© for sandy and reclaimed peat soils: An evaluative framework for soils in the Dutch Veenkoloniën. (In Dutch, with English abstract.). Rep. 2015-013 LbP. Louis Bolk Instituut, Driebergen. 22 p. Order Price: €0.00; Order code:2015-013 LbP; opens in new window Download full text pdf, 1,4 MB; opens in new window More information |
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 Meeusen, M., C.J. Koopmans, A. Stortelder, W. Zaalmink and H. Prins. 2015. Nature, biodiversity and the organic market: Exploring opportunities for market development. (In Dutch, with English abstract.). Louis Bolk Instituut, Lei Wageningen UR, Driebergen, Wageningen. 40 p. Download full text pdf, 0,63 MB; opens in new window More information |
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 Schrik, Y. and C.J. Koopmans. 2015. Sustainable use of compost: The Compost Scoring Cards. (In Dutch.). Louis Bolk Instituut, Driebergen. 11 p. Order Price: €0.00; Order code:2015-001 LbP; opens in new window Download full text pdf, 1,1 MB; opens in new window More information |
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 Koopmans, C.J. and L. Janmaat. 2014. Equivalency of the EKO label: Comparative study of European 'organic-plus' labels. (In Dutch.). Rep. 2014-015 LbP. Louis Bolk Instituut, Driebergen. 10 p. Download full text pdf, 0,66 MB; opens in new window More information |
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 Koopmans, C.J., P.I. Rietberg and G.J.H.M. van der Burgt. 2014. Calibration and adaptation of the NDICEA model to reduced tillage systems: Final-report of the Tilman CORE Organic II project. Work package 5.2. Rep. 2014-019 LbP. Louis Bolk Instituut, Driebergen. 48 p. Download full text pdf, 1,4 MB; opens in new window More information |
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 Beck, A., E. Cuoco, A.M. Häring, J. Kahl, C.J. Koopmans, C. Micheloni, B. Moeskops, U. Niggli, S. Padel and I.A. Rasmussen. 2014. Strategic Research and Innovation Agenda for Organic Food and Farming. TP Organics, Brussels. 60 p. Download full text pdf, 2,6 MB; opens in new window More information |
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 Cuijpers, W.J.M., C.J. Koopmans and J.W. Erisman. 2013. Building on Resilience, Principles for Sustainable Agriculture: a Draft Framework. Rep. 2013-026 LbP. Louis Bolk Instituut, Driebergen. 47 p. Download full text pdf, 0,99 MB; opens in new window More information |
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 Koopmans, C.J., J.G. Bokhorst, C. ter Berg and N.J.M. van Eekeren. 2012. Soil Signals: A practical guide to a fertile soil. (In Dutch, with English abstract.). Roodbond, Zutphen. 96 p. More information |
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 Koopmans, C.J., K. van Veluw and F. Wijnands. 2011. Participatory development: Cooperation in the demand-driven context of organic farming. (In Dutch.). Rep. 2011-032 LbD. BioConnect. Download full text pdf, 1,7 MB; opens in new window More information |
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| Vries, H. de, E. van der Wal, C.J. Koopmans, L. Nannes, S. Duijnhouwer and S. Meerman. 2010. Duurzame akkerbouw. Roodbont Publishers, Zutphen. More information |
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 Schmid, O., S. Padel, N. Halberg, M.A.S. Huber, M. Darnhofer, C. Micheloni, C.J. Koopmans, S. Bügel, C. Stopes, H. Willer, M. Schlüter and E. Cuoco. 2009. Strategic Research Agenda for organic food and farming: Technology Platform Organics. IFOAM EU Group, Brussels. 116 p. More information |
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| Zanen, M., C.J. Koopmans, J.G. Bokhorst and C. ter Berg. 2008. Special Fertilisation: Successful strategies for sustainable soil management. (In Dutch, with English abstract.). Rep. LD13. Louis Bolk Instituut, Driebergen. 73 p. Download full text pdf, 2,1 MB; opens in new window More information |
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 Bokhorst, J.G., C. ter Berg, M. Zanen and C.J. Koopmans. 2008. Mest, compost en bodemvruchtbaarheid: 8 jaar proefveld Mest als Kans. Rep. LD10. Louis Bolk Instituut, Driebergen. 28 p. Order Price: €6; Order code:LD10; opens in new window Download full text pdf, 4,8 MB; opens in new window More information |
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 Bokhorst, J.G., C. ter Berg, M. Zanen and C.J. Koopmans. 2008. The MAC trial: Results from a long-term organic inputs trial. Rep. LD10E. Louis Bolk Instituut, Driebergen. 24 p. Order Price: €6; Order code:LD10E; opens in new window Download full text pdf, 4,5 MB; opens in new window More information |
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 Zanen, M., J.G. Bokhorst, C. ter Berg and C.J. Koopmans. 2008. Investing down to the soil. (In Dutch, with English abstract.). Rep. LD11. Louis Bolk Instituut, Driebergen. 40 p. Order Price: €0; Order code:LD11; opens in new window Download full text pdf, 0,85 MB; opens in new window More information |
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 Zanen, M., J.G. Bokhorst, C. ter Berg and C.J. Koopmans. 2008. Strategieën voor duurzaam bodemmanagement: Ervaringen uit de biologische landbouw. Rep. LD12. Louis Bolk Instituut, Driebergen. Order Price: €6; Order code:LD12; opens in new window Download full text pdf, 3,7 MB; opens in new window More information |
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| Timmermans, B.G.H. and C.J. Koopmans. 2007. Biomassa als energiebron: Een missie voor de biologische en duurzame landbouw? Rep. LT31. Louis Bolk Instituut, Driebergen. 26 p. Order Price: €0; Order code:LT31; opens in new window Download full text pdf, 0,6 MB; opens in new window More information |
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| Koopmans, C.J. and C. ter Berg. 2006. Bodem en bemesting in de biologische landbouw op proefboerderij Rusthoeve 2003-2005. Louis Bolk Instituut, Driebergen. 53 p. More information |
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 Koopmans, C.J. and C. ter Berg. 2006. Soil fertility management in organic agriculture: Experiments at the Rusthoeve farm, 2003-2005. (In Dutch.). Louis Bolk Instituut, Driebergen. 66 p. Download full text pdf, 10,5 MB; opens in new window More information |
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 Koopmans, C.J., F.W. Smeding, M. Rutgers, J. Bloem and N.J.M. van Eekeren. 2006. Biodiversiteit en bodembeheer in de landbouw. Rep. LB14. Louis Bolk Instituut, Driebergen. 69 p. Download full text pdf, 0,65 MB; opens in new window More information |
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| Koopmans, C.J. and H. de Vries. 2006. Veldleeuwerik Duurzaamheid Doorgrond: Een zoektocht naar duurzame akkerbouw: Samenvatting activiteiten en resultaten 2003-2005. Louis Bolk Instituut, Driebergen. 37 p. More information |
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| Koopmans, C.J. 2005. Bodem en bemesting in de biologische landbouw op proefboerderij Rusthoeve. Louis Bolk Instituut, Driebergen. 27 p. More information |
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| Koopmans, C.J. 2005. Evaluating inputs for organic farming – a new system.: Case study on hydrolysed proteins. More information |
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| Koopmans, C.J. and H. de Vries. 2005. Skylark, sustainability understood. Louis Bolk Instituut, Driebergen. 32 p. More information |
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| Koopmans, C.J., M. Zanen, C. ter Berg and L. Nannes. 2005. Veldleeuwerik Duurzaamheid Doorgrond: Resultaten 2003-2005 van de indicatoren bodemvruchtbaarheid, bodemverlies en voedingsstoffen. Louis Bolk Instituut, Driebergen. 32 p. More information |
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| Koopmans, C.J., W.J.M. Cuijpers, W. Voogt, A. van Winkel and A. van den Bos. 2005. Biologische kasteelt op zandgrond: bodem en bemesting. Louis Bolk Instituut, Driebergen. More information |
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 Cuijpers, W.J.M., J.G. Bokhorst, C.J. Koopmans, W. Voogt and F. Zoon. 2005. Soil and soil fertility – Biokas 2005: A healthy soil forms the basis of successful crop production. (In Dutch, with English abstract.). DLV biologische landbouw, Louis Bolk Instituut en Praktijkonderzoek Plant & Omgeving. 28 p. Download full text pdf, 7,4 MB; opens in new window More information |
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| Cuijpers, W.J.M., J.G. Bokhorst, C.J. Koopmans, W. Voogt and F. Zoon. 2005. Bodem & Bemesting: Gezonde bodem basis voor geslaagde teelt. Louis Bolk Instituut, Driebergen. More information |
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| Joldersma, R., J.G. Bokhorst, E. Heeres, C.J. Koopmans and C. ter Berg. 2003. Hoe geef ik een cursus bodembeoordeling: Een handleiding voor cursusleiders. Louis Bolk Instituut, Driebergen. 54 p. Download full text pdf, 0,64 MB; opens in new window More information |
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 Koopmans, C.J. and E. Heeres. 2002. Stikstof en organische stof; dynamiek in biologische teelten. Rep. LB08. Louis Bolk Instituut, Driebergen. 78 p. Order Price: €10; Order code:LB08; opens in new window Download full text pdf, 16,1 MB; opens in new window More information |
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 Koopmans, C.J. and L. Brands. 2002. Ondersteuning van duurzaam bodembeheer - Testkit bodemkwaliteit. Louis Bolk Instituut, Driebergen. 96 p. Download full text pdf, 15,8 MB; opens in new window More information |
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| Koopmans, C.J. and B. Willems. 2001. Bodem en bemesting in de biologische glasgroententeelt. Louis Bolk Instituut, Driebergen. 46 p. More information |
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| Koopmans, C.J. and G.J.H.M. van der Burgt. 2001. Mineralenbenutting in de biologische landbouw. Louis Bolk Instituut, Driebergen. 118 p. More information |
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 Koopmans, C.J. and G.J.H.M. van der Burgt. 2001. Nutrient use efficiency in organic agriculture: an integral approach. (In Dutch, with English abstract.). Louis Bolk Instituut, Driebergen. 122 p. Download full text pdf, 24 MB; opens in new window More information |
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| Bokhorst, J.G. and C.J. Koopmans. 2001. Bemesting en bodemgebruik in de biologische landbouw: Stand van zaken en knelpuntenanalyse. Louis Bolk Instituut, Driebergen. 81 p. Download full text pdf, 0,9 MB; opens in new window More information |
Specialist journal articles, newsletters, etc |
 Koopmans, C.J. and F. Wijnands. 2009. Dutch Research on Organic Agriculture: approaches and characteristics. p. 14-23. In Sukkel, W. and Hommes, M. (ed.) Research on organic agriculture in the Netherlands. Wageningen UR and Louis Bolk Institute. Order Price: €0; Order code:2009_res_on_org_agri; opens in new window Download full text pdf, 5,2 MB; opens in new window More information |
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 Koopmans, C.J. and M. Zanen. 2008. Partnerships for sustainability. LEISA Magazine. 24(4):28-29. Download full text pdf, 160 kB; opens in new window More information |
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| Koopmans, C.J., F.W. Smeding and M. Zanen. 2006. Sturen van bodembiodiversiteit voor ecologische diensten. p. 12-13. In P. van Mullekom. (ed.) Bodem Breed 2006. Stichting Kennisontwikkeling Kennisoverdracht Bodem, Gouda. More information |
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| Koopmans, C.J. 2005. Bemestingsstrategieën op proefboerderij Rusthoeve. Euregio Scheldemond, Gent. More information |
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| Koopmans, C.J. 2005. Hand-out Rusthoeve. Louis Bolk Instituut, Driebergen. 2 p. Download full text pdf, 120 kB; opens in new window More information |
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 Koopmans, C.J., M. Zanen and C. ter Berg. 2005. De kuil: Bodembeoordeling aan de hand van een kuil. November 2005. Download full text pdf, 0,92 MB; opens in new window More information |
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| Koopmans, C.J., M. Zanen, C. ter Berg and L. Nannes. 2005. Veldleeuwerik Duurzaamheid Doorgrond. Resultaten 2004 van de indicatoren bodemvruchtbaarheid, bodemverlies en voedingsstoffen. More information |
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| Cuijpers, W.J.M., C.J. Koopmans, A. van den Bos and W. Voogt. 2005. Thema Bodemvruchtbaarheid. 14 p. More information |
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| Zanen, M., C.J. Koopmans and E. Heeres. 2005. Bijzondere Bemesting: kansrijke strategieën voor duurzame bodemkwaliteit. Ekoland. , p. 20-21. Download full text pdf, 70 kB; opens in new window More information |
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| Cuijpers, W.J.M., F.W. Smeding and C.J. Koopmans. 2005. Bodemleven lastig te sturen met mest of compost: Top van bodemvoedselweb krijgt harde klap bij stomen. More information |
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| Zanen, M. and C.J. Koopmans. 2004. Nieuwsbrief Bijzondere Bemesting 1: nummer 1 – maart 2004. Nieuwsbrief Bijzondere Bemesting #1. Louis Bolk Instituut, Driebergen. Download full text pdf, 150 kB; opens in new window More information |
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| Zanen, M. and C.J. Koopmans. 2004. Nieuwsbrief Bijzondere Bemesting 2: nummer 2 – juli 2004. Nieuwsbrief Bijzondere Bemesting #2. Louis Bolk Instituut, Driebergen. Download full text pdf, 200 kB; opens in new window More information |
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| Zanen, M., C.J. Koopmans, R. Postma and T. van Loon. 2003. Optimalisering van de stikstofvoorziening in de biologische groenteteelt. Download full text pdf, 0,51 MB; opens in new window More information |
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| Zwart, K.B. and C.J. Koopmans. 2002. Stikstofdynamiek in de biologische landbouw: modellen of rekenregels? p. 155-164. In Wijnands F.G., J.J. Schröder, W. Sukkel & R. Booij. (ed.) Biologisch bedrijf onder de loep. PPO-Lelystad. More information |
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| Koopmans, C.J., J.G. Bokhorst and A. van den Bos. 2001. Bemesting in de glastuinbouw. Afstemming op gewasbehoefte eerste vereiste. Ekoland. 21(7/8):24-25. Download full text pdf, 90 kB; opens in new window More information |
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| Koopmans, C.J. and K.B. Zwart. 2001. Van rekenregel naar computermodel. Ekoland. 21(4):22-23. More information |
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| Koopmans, C.J. 2000. Bemesting in de kas: Maximale stikstofgift vormt belemmering glasteelt. Ekoland. 2000-9, p. 20-21. More information |
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| Koopmans, C.J. 2000. Meer zicht op mineralenbenutting: Driejarig project moet leiden tot optimalisatie. Ekoland. 2001-1, p. 24-25. More information |
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| Koopmans, C.J. 2000. Rekenregels of simulatiemodellen?: Lezing studiedag Mest Als Kans 23/11/2000. More information |
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| Bokhorst, J.G. and C.J. Koopmans. 2000. Stikstoflevering uit de bodem: Meer aandacht voor verontachtzaamde stikstofbron. 2000-4, p. 25-27. More information |
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| Pronk, A. and C.J. Koopmans. 2000. Biologische teelt aardt goed in gezonde bodem.: De Boomkwekerij. 13(26):16-18. More information |
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| Zwart, K.B. and C.J. Koopmans. 2000. Voorspellen van de mineralisatie in de bollenteelt met computermodellen. p. 15-16. In (ed.) Bezoekersgids open dag Proefbedrijf de Noord. More information |
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