Determination of physical properties of guava (Psidium guajava)

Abstract

The physical properties of Lucknow-49 (Sardar Guava) variety of guava fruits and its peduncle, stemand plant parameters were studied for the development of harvesting device for guava fruit. The different properties of guava fruit, viz., its average equivalent diameter, sphericity, and average weight of single fruit, volume of ripe fruit, true density, specific gravity, average angle of external friction, coefficient of friction, angle of repose were found to be63.77mm, 0.9616, 143.01g, 144cm3, 0.976g/cm3, 0.976, 16.37o, 0.29 and 34.81o respectively. The fruit’s colour and shape were observed as dark green to yellowish green and round to ovate respectively. Apart from guava fruit, the physical properties of guava peduncle and stem were studied. An average diameter, length, angle with branch, cutting strength, stress and torque of guava peduncle were found to be 2.36mm, 27.1mm, 37o, 137.401 N, 33.570 N/mm2and 0.325 N m respectively. An average diameter, length, cutting strength, stress and torque of guava stem were found to be 3.2mm, 48.4mm, 276.556 N, 41.322N/mm2and 0.886 Nm respectively. Guava plant parameters, viz., height of plant, plant canopy diameter and plant canopy volume were estimated as 3.825m, 5m and 24.76m3 respectively. An automated approach was designed leveraging C# programming language for self-serving calculations of different metrics during the course of this research study.