Knowledge of agricultural goods' mechanical qualities is critical for the design, development, programming, and operation of automated harvesting, handling, and processing machinery. The goal of this research was to see how field techniques (pre-harvest treatments) affected specific mechanical qualities of eggplant (Solanum aethiopicum L.) fruits, which are important for agricultural automation. In the field study, eggplant (cv. Djamba) was grown in four distinct treatment mediums: zero amendment (also known as the control), organic manure, potassium nitrate (KNO3), and a mixture of organic manure and KNO3. The eggplant fruits were gathered when they were fully mature (35 days after blooming) and their mechanical characteristics were assessed using conventional techniques. Field practises had a substantial (p0.05) influence on all mechanical characteristics studied, according to the findings. When compared to other treatments, the fruits grown utilising a mix of organic manure and KNO3 had a higher mass. The control fruits had the lowest failure force (305.58 N) and failure energy (3.895 Nm), but the fruits grown with organic manure and KNO3 had the highest failure force and failure energy (636.6 N and 5.312 Nm, respectively). The study found that fruits grown with organic manure had higher failure force and energy than those grown with KNO3. Furthermore, the fruits produced with organic manure had the greatest deformation (24.01 mm) at the failure point, whereas the control fruits had the least (18.8 mm). In terms of puncture qualities, the tissues of the organic manure-grown fruits showed the lowest resistance to puncture force (50.30 N), which was lower than the 65.73 N reported by the control fruits. The fruits planted with KNO3 had the highest resistance to piercing force (89.17 N). These findings will aid in improving the efficiency of eggplant fruit harvesting and handling machinery, lowering the rate of mechanical damage to harvested items.
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