Field efficiency is a main factor for obtaining high productivity of agricultural machinery. The aim of this paper was to determine the field efficiency of KTP 2M and CASE IH 8000 sugarcane harvester machines, working with different lengths of cutting fronts. The research was carried out in the Panchito Gomez Toro area of production, belonging to Sugar Enterprise, Villa Clara, during February and March 2020. The main movement times of the harvester inside the field was obtained by stop watch, as well as the fuel consumption during the works. The influence of the length of the cutting fronts on the turning time, time for completing the task and field efficiency were determined according to the sugarcane yield. The results show that lengths of cutting front less than 300 m, represent greater losses in time and higher rate of fuel consumption. Lengths of cutting fronts greater than 500 m, do not represent an increase in field efficiency.

Peanut postharvest processing in developing regions often suffers from equipment mismatches due to lack of varietal specific engineering data. The objective of this study was to determine the physical and mechanical properties of four peanut cultivars (INIAP 380, Charapoto, Caramelo, and Rosita) grown in Manabí, Ecuador, to establish engineering parameters for design and optimization of postharvest equipment. Through standardized measurements and statistical analyses, was characterized kernel dimensions (length, equatorial diameter, mass, density, sphericity, flow properties (angle of repose), friction coefficients and rolling resistance coefficients (rubber, stainless steel, carbon steel). Key findings include: (1) 90.5% of kernels within the 6.8-10.28 mm diameter range ideal for mechanical sorting, but for accurate classification, gravimetric or densimetric methods should be employed instead of dimensional sorting (2) 33.7% lower dynamic friction on stainless steel versus rubber surfaces, and (3) Barriga de Sapo's superior sphericity (0.65) and rolling resistance (ρₑ=0.554±0.007). These results provide the first complete engineering dataset for Ecuadorian peanut varieties, enabling the design of adapted seeders, conveyors, and storage systems. The study particularly supports small-scale processors in Manabí through: (a) DEM/CFD modeling inputs, (b) evidence-based material selection (e.g., stainless steel for energy efficiency), and (c) quality control standards using density thresholds.