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Mass modeling of caper (Capparis spinosa) with some engineering properties


  • Nomenclature

    M = fruit mass, g; V = fruit Volume, cm3; Dg = geometric mean diameter, mm; S = surface area, mm2; L = length of fruits, mm; W = width of fruit, mm; T = thickness of fruit, mm; PA1 = first projected area which perpendicular to L direction, mm2; PA2 = second projected area which perpendicular to W direction, mm2; PA3 = third projected area which perpendicular to T direction, mm2; CPA = criteria projected area, mm2; SD = standard deviation; b0, b1, b2 = curve fitting parameters; X = independent parameter.


Ali Nejat Lorestani, Mechanics of Agricultural Machinery Department, Faculty of Agriculture, Razi University of Kermanshah, 6715685438 Kermanshah, Iran. Tel: +98-831-8331662; Fax: +98 831 8331662; E-mail:



Horticultural crops used as food with a similar weight and uniform shape are in high demand in terms of marketing value.


Therefore, an awareness of methods for grading fruits and vegetables based on weight is crucial. A part of this research was aimed at presenting some physical properties of caper.


In addition, in this study, the mass of caper was predicted using different physical characteristics in four models that include linear, quadratic, S-curve and power.


According to the results, all properties considered in the current study were found to be statistically significant at the 1% probability level for the best and the worst models for prediction; the mass of caper was based on volume and second projected area of the caper with determination coefficients of 0.984 and 0.323, respectively.


Mass model based on first projected area from an economical standpoint is recommended.