EFFECT OF DEFICIT IRRIGATION ON THE ELASTIC PROPERTIES OF TOMATO FRUITS

Hassan, Ahmed M.; Ibrahim, Mohamed M.

doi:10.21608/mjae.2017.95830

EFFECT OF DEFICIT IRRIGATION ON THE ELASTIC PROPERTIES OF TOMATO FRUITS

Document Type : Original Article

Authors

Associate Prof., Ag. Eng. Dept., Fac. of Ag., Cairo Univ., Egypt.

10.21608/mjae.2017.95830

Abstract

The aim of this research work was to determine the physical and elastic properties of tomato fruits (Lycopersicon esculentum) cv under four water regimes (ET₁₀₀, ET₉₀, ET₈₀ and ET₇₀ of water requirements) to develop a technique that canpredict the packing height to protect fruits from mechanical damage.The physical properties of tomato include mass, volume, dimensions, bulk density, soild density and geometric mean diameter. The elastic properties of tomato fruit include Young's modulus of elasticity (E), firmness coefficient (FC), bioyield stress (σb), bioyield strain (εb), rupture stress (σr), rupture strain (εr) and rupture energy (RE). The results showed that the different water regimes have a significant effect on physical and elasticity properties.The values of E, FC, σb and RE were increased with decreasing water level, while, σr was increased with increasing water level. Accordingly, the maximum heights of packing box were 177.4, 353.6, 456.5 and 526.4 mm for ET₁₀₀, ET₉₀, ET₈₀ and ET_70, respectively.

Keywords

Main Subjects

Agricultural Irrigation and Drainage Engineering

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