Evaluation of the physical properties in three Vietnamese peanut (Arachis hypogaea L.) varieties

The physical characteristics of three peanut (Arachis hypogaea L.) varieties grown in Vietnam (Lac Do (RP), Lac Van (SP), and Lac Den (BP)) were evaluated. The values of the measured properties differed significantly. The RP seeds had the highest moisture level (3.9 % RP, 2.9 % SP, 3.7 % BP). The SP variety showed the highest mass per 1000 seeds (474 g RP, 599 g SP, and 541 g BP). The bulk and particle densities of all the varieties ranged from 0.633 to 0.664  g/cm³ and from 1.10 to 1.14 g/cm³, respectively. The RP seeds were relatively larger based on their length (18.2 mm), width (9.0 mm), and thickness (8.7  mm). In terms of sphericity (0.62 RP, 0.62 SP, and 0.65 BP), the BP seeds were rounder in shape. The angle of repose was higher in the SP seeds (28° RP, 28.1° SP, 20° BP). The BP seeds had higher static friction coefficient values (0.37 RP, 0.35 SP, 0.40 BP). These findings highlight the need to adapt standard peanut cultivation, processing, storage, and transportation methods to each peanut variety in order to increase the efficiency of local and global peanut-based production and reduce its potential losses.

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