van de Ven, Gerrie and Bos, Jules (2005) Closing nutrient cycles in Dutch organic farming: an explorative scenario study of agronomic consequences. Paper at: Researching Sustainable Systems - International Scientific Conference on Organic Agriculture, Adelaide, Australia, September 21-23, 2005. [Unpublished]
Limited to [Depositor and staff only]
Given the principles of organic agriculture, nutrient cycling in Dutch organic farming can be characterised as imperfect, mainly because of large imports of nutrients from conventional agriculture and from abroad. Recently, research has been initiated into the perspectives for better closing nutrient cycles by intensifying the exchange of (by-)products between organic farming sectors. The linear programming model was developed to quantify under different scenarios the agronomic consequences of further closing nutrient cycles in terms of changes in land use and exchange of (by-)products.
Better closing of nutrient cycles requires an increase in the proportion of Dutch feed ingredients in animal diets, an increase in the proportion of feed and leguminous crops in rotations, an increase in the export of manure from the organic dairy sector and an increase of the import of ‘acceptable’ nutrients from society. Depending on the sector and the degree in which ‘undesirable’ nutrient imports are banned, current sizes of the main farming sectors will have to change to be in equilibrium, i.e. a situation in which total organic manure production determines organic crop areas and crop productivity per ha and vice versa. Closing nutrient cycles will result in an extensification of Dutch organic farming and an increase in cost prices.
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Keywords:||organic farming, nutrient cycling, linear programming, mixed farming|
|Subjects:||Crop husbandry > Production systems > Cereals, pulses and oilseeds|
|Research affiliation:||International Conferences > 2005: 1st ISOFAR Conference > 2005: 1st ISOFAR Conference|
|Related Links:||http://orgprints.org/4013/, http://www.isofar.org/adelaide2005, http://orgprints.org/view/projects/int-conf-isofar-2005.html|
|Deposited On:||15 Nov 2005|
|Last Modified:||12 Apr 2010 07:30|
|Refereed:||Peer-reviewed and accepted|
|Additional Publishing Information:||The paper presented here is the final paper submitted by the authors to the conference Researching Sustainable Systems. |
The final edited papers are available with the following publication:
Köpke, Ulrich; Niggli, Urs; Neuhoff, Daniel; Cornish, Peter; Lockeretz, Willie und Willer, Helga, (Hrsg.) (2005) Researching Sustainable Systems. Proceedings of the First Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), Held in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the National Association for Sustainable Agriculture, Australia (NASAA), 21 – 23 September 2005, Adelaide Convention Centre, Adelaide, South Australia.. Research Institute of Organic Agriculture FiBL, CH-Frick, and International Society of Organic Agriculture Research (ISOFAR), c/o Institute of Organic Agriculture (IOL), DE-University of Bonn. http://orgprints.org/4013/
Distribution: Paper copies may be ordered from FiBL at a cost of 28 Euros plus mailing costs (see FiBL shop at http://www.fibl.org/shop); FiBL order number 1394. A PDF version is available free of charge for ISOFAR members via the member area of www.isofar.org.
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