Dear Matías,
Quite a while ago., I worked with Dr. Robert Caldwell to develop a multiple cropping system model, CropSys, that incorporated all of the DSSAT crop models that were available at the time (1991). It is described in:
Caldwell, R.M. and Hansen, J.W., 1993. Simulation of multiple cropping systems with CropSys. Pp. 397-412 in: Penning de Vries, F.W.T., Teng, P., and Metselaar, K. (Eds.), Systems Approaches for Agricultural Development, Vol. 2. Kluwer Academic Publishers, Dordrecht, The Netherlands.
Unfortunately we did not have the resources to incorporate major crop model structure changes associated with the transition from DSSAT v. 2 to v. , or to maintain CropSys. Robert Caldwell maintained an educational version for at least a while.
Other potentially-relevant papers (which I haven't looked at carefully):
Robert M. Caldwell, Anthony A. J. Fernandez, A generic model of hierarchy for systems analysis and simulation, Agricultural Systems, Volume 57, Issue 2, June 1998, Pages 197-225.
H. Sinoquet, M. Rakocevic, C. Varlet-Grancher, Comparison of models for daily light partitioning in multispecies canopies, Agricultural and Forest Meteorology, Volume 101, Issue 4, 12 April 2000, Pages 251-263.
E. Malezieux, E., et al. 2009. Mixing plant species in cropping systems: concepts, tools and models. A review. Agron. Sustain. Dev. 29:43–62.
B. A. Keating, P. S. Carberry, Resource capture and use in intercropping: solar radiation, Field Crops Research, Volume 34, Issues 3-4, September 1993, Pages 273-301.
Sillon, J., Ozier-Lafontaine, H., Brisson, N. 2000. Modelling daily root interactions for water in a tropical shrub and grass alley cropping system. Agroforestry Systems 49:131-152.
García-Barrios, L., Mayer-Foulkes, D., Franco, M., Urquijo-Vásquez, G., Franco-Pérez, J. 2001. Development and validation of a spatially explicit individual-based mixed crop growth model. Bulletin of Mathematical Biology 63:507-526.
----- Original Message -----
From: "Matías Cambareri" <[log in to unmask]>
To: [log in to unmask]
Sent: Friday, April 1, 2011 7:10:49 AM GMT -05:00 US/Canada Eastern
Subject: intercrops simulations
Dear Group
I´m trying to simulate the performances of a wheat/soybean and maize/soybean intercrops. The design of intercrops (or relay intercrops) is 3:1 for wheat/soybean rows (distance inter-rows 0.20 m) and 2:1 for maize/soybean rows (distance inter-rows 0.52 m). The soy is sown 30 days before the harvest of the wheat. In the maize/soybean system, soybean is sown approximately 30 days after maize sowing.
I´m working with DSSAT v4.5, but I don´t know if is possible this type of simulation. Any idea for this simulation is welcome.
Greetings
Ing. Agr. Matías A. Cambareri
EEA INTA Balcarce - Facultad de Ciencias Agrarias
Ruta 226 Km. 73,5; C.C. 276
(7620) Balcarce
Tel: +54 (2266) 43-9100/03 Int: 536
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James W. Hansen, Ph.D.
Research Scientist, CCAFS Theme Leader, Adaptation through Managing Climate Risk
The International Research Institute for Climate and Society
The Earth Institute
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