1. General Model Information

Name: BAsic CROp growth Simulator

Acronym: BACROS

Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: ordinary differential equations
Main application:
Keywords: crop growth, crop enclosures, daily processes, organ weights, leaf area, carbohydrate status, water content, simulation module, photosynthesis, deterministic


Prof. Dr. F.W.T. Penning de Vries
Research Institute for Agrobiology and Soil Fertility (AB-DLO)
Dept. Agrosystems Research,
P.O.Box 14, 6700 AA Wageningen, THE NETHERLANDS.
Phone : +31.317.475960
Fax : +31.317.423110
email: pdvries@ab.dlo.nl


Penning de Vries, F.W.T.


This model for simulation of program of crop growth was developed at the Department of Theoretical Production Ecology of the Agricultural University in Wageningen and the Centre for Agrobiological Research, and exists in two versions. One version concerns the seasonal gross assimilation, respiration and transpiration of C3 and C4 crops with optimal supply of water and nutrients and the meso-weather as input, morphogenesis being in part introduced by forcing functions. The other version simulates the daily course of these processes and is especially geared to the interpretation of measurements in crop enclosures. Both versions are verified under a wide range of conditions and the influence of the main parameters and structural features is studied by a sensitivity analysis. The simulation models are presented in CSMP, but the text may be read without any previous knowledge of this language. The physiological, biochemical and physical aspects of the crop growth simulation model are treated extensively and examples are given of how the results can be applied. Parentage: ELCROS (1972), SUCROS* (1982, 1987) and MACROS* (1989).

Author of the abstract:
CAMASE Register of Agro-ecosystems Models

II. Technical Information

II.1 Executables:

Operating System(s): Executables are not available

II.2 Source-code:

Programming Language(s): CSMP Source-code is available from the Author, in principle this software product may be used only fornon-commercial purposes. The product is accompanied by an AB-DLO/TPE-WAU Licenceagreement and warranty disclaimer. Costs: Dfl. 70,=.

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

Rate variables: Detailed rates of photosynthesis, respiration and transpiration of cropcomponents, crop development.
Number of rate variables: > 50.
State variables: Organ weights, leaf area, carbohydrate status, water content.
Number of state variables: > 50.
data: Weather, ambient CO2, initial values state variables; observations for comparison.

III.2.1 Input

Weather, ambient CO2, initial values state variables; observations for comparison. Number of input data: About 40. Output data: Any rate of state variable, accumulated values.

III.2.2 Output

Any rate of state variable, accumulated values. Number of output data: Typically 20.
Time interval of simulation: 1 h, or less.
Basic spatial unit: 1 ha.

IV. References

Wit, C.T. de, et al., 1978. Simulation of assimilation, respiration and transpiration of crops. SimulationMonograph Series, PUDOC, Wageningen, The Netherlands. 141 pp.

Penning de Vries , F.W.T., 1983. Modelling of growth and production. In: Physiological Plant Ecology IV, pp.118-150 in Encyclopedia of Plant Physiology. New Series, Vol 12 D. O.L. Lange et al. (Eds.). Springer VerlagBerlin, Heidelberg.

Penning de Vries, F.W.T., 1977. Simulation der Assimilation und Transpiration der Pflanzendecke nachgrundlegender Gesetzen In: Biophysikalische Analyse pflanzlicher Systeme. K. Unger (ed.). Fischer Verlag, Jena.

Wit, C.T. de & F.W.T. Penning de Vries, 1985. Predictive models in agricultural production. Phil. Trans. R. Soc.London B310, 309-315.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: 16. 6. 1997 -
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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