Ernesto Ramos Carbajal

Autonomous University of Chiapas · Escuela de Estudios Agropecuarios Mezcalapa

The objective of this paper was the evaluation of chemical- physical properties of nanche and the determination of the quality in its fruit. Nanche fruit has food and agroindustry potential due to its chemical properties, with º Brix percent between 10,03 and 10,35, pH values in fruit in the range of 3,83 to 5,27 and citric acid percent between 1,2...

Ball mills are widely used in mining, agriculture, and cement industries. There is little information on the design of such equipment from a structural point of view. Some of the main causes of failure are fractures of its walls, due to the impact of steel balls on its internal surfaces. Normally, they are attenuated through the use of wet milling,...

An important soil variable is mechanical resistance, a feature that interacts with other soil properties such as bulk density, texture, moisture content and porosity. Hence a number of experimental investigations have been conducted to obtain a probe of better correlation with volumetric density and resistance to penetration. However, so far, there...

The present study was carried out between the months of August and September of 2019, in Ribera Miguel Hidalgo Community of Copainala Municipality, Chiapas, Mexico. For this, tests related to some physical, mechanical and chemical variables were carried out, with the objective of evaluating these parameters and determining the quality of the fruits...

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...

The study of the physical-mechanical properties is important for the design and construction of equipment and structures, for the management, collection, transportation, cleaning, classification, and agro industrial processing, as well as the input data to the theoretical model that bases the parameters of design and operation of the sheller machin...

A research in order to evaluate the influence of several geometrical and operational parameters of sensing tips on the quality of on-the-go soil strength recording, was carried out in a Cuban typical Red Ferralitic soil. The considered parameters were the geometric characteristic of the sensing tip, the sensing speed and the protrude of the tip in...

The conical probe tip provides a comparison basis for the design of any other probe tip. A conceptual theoretical model of the soil-probe interaction of a conical probe tip, designated to sensing of soil penetration resistance, is presented. The model, elaborated from a quasi-static analysis of the system of forces acting on the probe, takes into a...

From the analysis of existent constitutive models to determine the properties in the interphase soil metallic surface, numerous investigators utilize Mohr Coulomb’s graphic solution, which does not explain the influence of normal stress, the adherence and sliding speed in the determination of the coefficient of dynamic friction m d. The model propo...

Con el objetivo de conocer el valor del coeficiente fricción dinámico suelo-metal como dato de entrada para la evaluación de los modelos físicos matemáticos desarrollados con vista al diseño de parámetros geométricos de sondas utilizadas en la agricultura de precisión, se determinó experimentalmente sus valores para un suelo Ferralítico rojo en fun...

Se diseñó, construyó y calibró un transductor de fuerza tipo S en el Centro de Mecanización Agropecuaria (CEMA) de la Universidad Agraria de La Habana (UNAH), sobre la base del análisis de tensiones y deformaciones, concentración y uniformidad de las deformaciones unitarias en la zona de colocación de los extensómetros, empleando el análisis numéri...

En el presente trabajo se aplica el Método Económico-Matemático basado en la Programación Lineal para determinar el completamiento óptimo del parque de tractores y máquinas a emplear para la realización de las diferentes tecnologías de preparación de suelo y cosecha del arroz en áreas del CAI azucarero «30 de Noviembre», en la provincia de Pinar de...

Con el objetivo de evaluar la respuesta de plántulas de tomate (Lycopersicon esculentum Mill) a la aplicación de biosólidos en un suelo Ferralitico Rojo compactado, se condujo un experimento en macetas. Los tratamientos estudiados fueron: S, suelo natural; F, suelo tratado con fertilizante mineral y B, suelo tratado con 135 g biosólidos.kg-1 de sue...