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Nowadays, it is interest of Cuban sugarcane agriculture, the introduction of conservationist methods during the preparation of soils for sugarcane sowing. Localized soil preparation, done exclusively in the area of root growth of the seedlings, is a viable alternative, both, from the point of view of soil conservation, as well as from point of view of economy of energy resources that are dedicated to the preparation of large areas of land. In this sense, a tillage implement having four staggered shanks with "V"- shaped blades has been developed, leaving a trapezoidal profile in the transverse plane of the soil removed, according to the demands of sowing. In the design process of this equipment, it was necessary to carry out certain analyses related to suction and stability, developing an analytical method and software that facilitates these analyses, avoiding the use of cumbersome traditional graphic methods, based on the construction of force polygons and rays, which make it difficult to evaluate multiple variants. The application of this method to the aggregate formed by an YTO-1604 tractor and a the tillage implement with four staggered shanks, made it possible to determine the most suitable position for the support wheel, as well as for the instantaneous center of rotation of the tractor suspension mechanism. It was also possible to evaluate the incidence of the wedge angle on the conditions of suction and stability. [ABSTRACT FROM AUTHOR]

The software "CRIBAS II" for calculation of the main parameters of vibratory planes surfaces, used for cleaning, classification or transportation of agricultural products, is presented. The software facilitates to calculate the parameters of the vibratory regime to apply to the surface (frequency, amplitude and direction of vibrations) in order to obtain the expected movement of the processed particles, during their traveling on the surface. [ABSTRACT FROM AUTHOR]

The objective of this work is to determine the physical-mechanical properties of banana bunches as an object of their transportation in aerial cable and the parameters required for the design of a transport system of banana bunches in mountainous areas of Trujillo State, Venezuela. A descriptive analysis of all the samples was carried out for the properties studied, obtaining the arithmetic mean and the dispersion measurements (standard deviation and coefficient of variation), as well as a variance analysis, determining the p-value and an analysis of simple and multiple regression. The results obtained show that the arithmetic mean obtained for the diameter of the rachis was 5,41 cm, with a standard deviation of ± 0,77 cm; the length of the clusters 63,96 cm, with a standard deviation of ± 14,92 cm and the diameter of the bunches amounted to 33,67 cm, with a standard deviation of ± 2,69 cm. Furthermore, the mass of the bunches obtained amounted to 16,58 kg, with a standard deviation of ± 4,91 kg, the Xc and Yc coordinates, obtained from the center of mass of the clusters reached 16,73 and 28,84 cm, with a standard deviation of ± 1,37 and 3,78 cm, respectively. In addition, the moment of inertia amounted to 0,13 kg m2 with a standard deviation of ± 0,11 kg m². The best adjusted model of the relationship between the moment of inertia and the mass of banana clusters was the Box-Cox Method with an R² of 86, 65%. Regarding the relationship with the bunch diameter, the model that was best adjusted was the Polynomial with an R² of 88, 7%. [ABSTRACT FROM AUTHOR]