Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato

R. Shamshiri, H. Che Man, A.J. Zakaria, Peter van Beveren, W.I. Wan Ismail, D. Ahmad

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3 Citations (Scopus)


Estimation of plant's evapotranspiration (ET) or water loss to the atmosphere depends on the vapor pressure deficit (VPD) of the closed-field environment (greenhouse). The objective of this work was to develop a membership function model for defining optimal VPD of greenhouse air for tomato cultivation (Lycopersicon esculentum) at different growth stages (GS) and light conditions (sun, cloud, night). Mathematical descriptions of a peer-reviewed published growth response (GR) model for optimal greenhouse air temperature (T) and relative humidity (rH) were derived and implemented in a computer program. An incremental algorithm was written in MATLAB

Original languageEnglish
Pages (from-to)281-290
JournalActa Horticulturae
Publication statusPublished - 21 Mar 2017
EventIII International Conference on Agricultural and Food Engineering - Kuala Lumpur, Malaysia
Duration: 23 Aug 201625 Aug 2016



  • Greenhouse
  • Growth response
  • Membership functions
  • Optimal value
  • Tomato
  • Vapor pressure deficit

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