1. General Model Information

Name: WaNuLCAS: Water, Nutrient and Light Capture in Agroforestry Systems


Main medium: terrestrial
Main subject: agroforestry,forestry,agriculture
Organization level: landscape
Type of model: ordinary differential equations
Main application: simulation tool,research,education
Keywords: agroforestry, agroecosystems,water capture, nutrient capture, light capture, tree-soil-crop interactions, alley cropping,STELLA,


Meine van Noordwijk
ICRAF, Southeast Asian Regional Programme,
Jl. Cifor, Situgede, Sindangbarang,
P.O. Box 161, Bogor 16001,

Phone: 62-251-625-415
Fax: 62-251-625-416
email: icraf-indonesia@cgiar.org or b.lusiana@cgiar.org

Homepage: http://www.icraf.cgiar.org/sea/


Meine van Noordwijk (Senior Soil Scientist),
Betha Lusiana



WaNuLCAS was developed to represent tree-soil-crop interactions in a wide range of agroforestry systems where trees and crops overlap in space and/or time (simultaneous and sequential agroforestry).

The model is based on above and below ground architecture of trees and crops, elementary tree-crop physiology and soil science. It can be used for exploring positive and negative interactions for different combinations of trees, crops, soil, climate and management by the farmer.

WaNuLCAS makes use of the STELLA modelling environment and thus allows users to modify parameters between simulations and add model structure and relations of specific interest. It can be used for teaching as well as research.

II. Technical Information

II.1 Executables:

Operating System(s):

II.2 Source-code:

Programming Language(s): STELLA

II.3 Manuals:

Title: WaNuLCAS 2.0. background on a model of Water, Nutrient and Light Capture in Agroforestry Systems.
Downloadable from: http://www.icraf.cgiar.org/sea/AgroModels/WaNulCAS/index.htm

II.4 Data:

WaNuLCAS comes with a number of default input files for different crops, soils and run-options.
All available in accompanying excel file (WaNulCAS.xls).

Downloadable from: http://www.icraf.cgiar.org/sea/AgroModels/WaNulCAS/index.htm

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Van Noordwijk, M. and Lusiana, B. 2000. WaNuLCAS 2.0, Background on a model of water nutrient and light capture in agroforestry systems. International Centre for Research in Agroforestry (ICRAF), Bogor, Indonesia. 186 pp

Van Noordwijk M, Radersma S and Lusiana B.1999. Modelling root architecture and phosphorus uptake in agroforestry .Agroforestry Forum 9:28-29

Van Noordwijk, M., M. Van Roode, E.L. McCallie, B. Lusiana, 1998. Erosion and sedimentation as multiscale, fractal processes: implications for models, experiments and the real world. In: F. P. d. Vries, F. Agus and J. Kerr (eds.) Soil Erosion at Multiple Scales, Principles and Methods for Assessing Causes and Impacts. CAB International, Wallingford. pp. 223-253.

van Noordwijk, M. and Lusiana, B. 1999. WaNuLCAS, a model of water, nutrient and light capture in agroforestry systems. Agroforestry Systems (45:131-158)

Rowe E, Hairiah K, Cadisch G, van Noordwijk M, Giller K. 1998. Testing the safety net role of hedgerow tree roots by 15 N placement at different soil depths. Agroforestry Systems 43: 81-93.

Taylor, J. and Muetzelfeldt, R. 1998. Re-implementation of WaNuLCAS in AME , Institute of Ecology and Resource Management, The University of Edinburgh

van Noordwijk, M.; Hairiah, K.; Lusiana, B.; Cadish, G; Bergstrom, L. (ed.); Kirchmann, H. 1998. Tree-soil-crop interactions in sequential and simultaneous agroforestry systems. In: Carbon and nutrient dynamics in natural and agricultural tropical ecosystems.1998, 173-190; 24 ref..

van Noordwijk, M. 1996. Models as part of agroforestry research design. Special issue: biological management of soil fertility for sustainable agriculture on an ultisol. Agrivita. 1996, 19: 4, 192-197; 4 ref..

van Noordwijk, M. and Ong, C.K. 1996. Lateral resource flow and capture - the key to scaling up agroforestry results. Agroforestry-Forum.1996, 7: 3, 27-31; 1 ref..

Noordwijk, M. van; Geijn, S.C. van de; 1996. Root, shoot and soil parameters required for process-oriented models of crop growth limited by water or nutrients. Plant-and-Soil.1996, 183: 1, 1-25; 137 ref..

Willigen, P. de; Noordwijk, M. van; Kabat, P. (ed.); Marshall, B. (ed.); Broek, B.J. van den (ed.); Vos, J. (ed.); Keulen, H. van; 1995. Models for interactions between water and nutrient uptake. In: Modelling and parameterization of the soil plant atmosphere system: a comparison of potato growth models.1995, 135-153; 18 ref..

Noordwijk, M. van; Spek, L.Y.; Purnomosidhi, P. 1995. Quantifying shallow roots: tree geometry makes root research easy. Agroforesteria-en-las-Americas.1995, 2: 6, 23-26; Translation of an article in Agroforestry Today (1995) 7 (2) 9-11; 5 ref..

Ranganathan, R.; Wit, C.T. de; Noordwijk, M. van; Black, C.R.; Marshall, F.M.; Corlett, J.E.; Brenner, A.J.; Wallace, J.S.; Garrity, D.P.; Lawson, G.; Soumare, A.; Groot, J.J.R.; Hairiah, K.; Ong, C.K. (ed.); Huxley, P. 1996. Tree-crop interactions: a physiological approach. XV+386pp., CAB INTERNATIONAL; Wallingford; UK

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: Betha LusianaThu, 01 Mar 2001

Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:52 CEST 2002

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