A modified CROPGRO model for simulating soybean growth in controlled environments.

J. Cavazzoni, T. Volk, G. Stutte

Research output: Contribution to journalArticlepeer-review


The CROPGRO crop growth model is adapted in order to analyze experimental data from a soybean (cv. Hoyt) experiment conducted at elevated CO2 levels (1200 micromol mol-1) at Kennedy Space Center, FL. The following adaptations to original CROPGRO produced model agreement with gas-exchange data: the input of square-wave temperature and photosynthetically active radiation (PAR) profiles; the input of the appropriate hydroponic substrate PAR albedo; modified biomass partitioning and developmental parameters; an increased leaf area expansion rate through the fifth vegetative node; a decreased specific leaf area after the fifth vegetative node; and an increased incident diffuse PAR fraction over typical field values. The model demonstrated here suggests that with continued development, modified CROPGRO will be a useful tool in the analysis and eventual optimization of legume production in bioregenerative life support systems.

Original languageEnglish (US)
Pages (from-to)43-48
Number of pages6
JournalLife support & biosphere science : international journal of earth space
Issue number1-2
StatePublished - 1997

ASJC Scopus subject areas

  • General Medicine


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