This paper focuses on determining the perception and characterization of the pastures in the farms of livestock producers and researchers in the Canton Sachas and Francisco Orellana, Province of Orellana, Ecuador. Their objective was to understand the use and management of Amazonian tropical pastures. Seventeen cattle farms of 8 communities were characterized to observe the characterization of the farmers, land use, use of forage banks, pasture management, and bovine cattle housing. A semi-structured interview was designed to collect primary information about the problem under investigation. When characterizing the farmers in relation to land use, before 47.5% of the producers were engaged in agriculture, today 85.9% carry out livestock work with silvopastoral practices. Only 14.1% were dedicated to agriculture and the production of coffee and cocoa. Regarding the use of feed banks, 35.29% have more food for their animals, while 5.88% have better environmental conditions. In addition, 77.6% of the farmers mentioned that they have improved their production with the use of the feed bank. In conclusion, the results indicate that small and medium producers can benefit from silvopastoral systems as an alternative to improve production and not affect the environment.

A linear dynamic study of the tensional status of the unloading conveyor´s spin beam in the new model CCA-5000 Cuban sugarcane harvester is carried out. The dynamic coefficients were determined using a strain gauge experimental evaluation of the KTP-23 harvester, which is a similar model in structure to the CCA-5000. A finite elements analysis is used to obtain the safety distribution factor and the tensions in the beam for different load combinations linked to a dynamic variation curve of the loads. Aiming to verify the presence or not of large amplitudes on the system oscillations caused by the resonance phenomenon, an analysis of the frequency modes for each load status is conducted, and the results are compared with the terrain irregularities frequencies on which the harvester moves. Finally, taking into account the previous results, the shape of the beam is optimized in order to decrease its steevolume.

ResumenLas cargas de explotación en las cosechadoras de caña han sido insuficientemente estudiadas y constituyen la base del modelo estadístico de las cargas de explotación como información de entrada al sistema dinámico. El experimento se llevó a cabo en un diseño con un esquema factorial (3 x 2), utilizando tres rendimientos del cultivo y dos sentidos de inclinación de las plantas, con tres repeticiones. En el trabajo se utilizó la extensometría como método de investigación experimental y con ayuda de la estadística descriptiva y dinámica se obtuvieron los parámetros estadísticos de las cargas de explotación de la cosechadora de caña para diferentes regímenes y condiciones de explotación del este de Cuba, así como las características dinámicas de las mismas. Como resultado del trabajo se constató que el consumo de potencia para la realización del proceso tecnológico es del 84 %, los órganos con mayor consumo de potencia son los discos de corte base (20.4 kW) y el aparato trozador (11.8 kW). El espectro de potencia del momento torsor en el aparato trozador oscila en el rango de 0 a 12 Hz, la eficiencia del sistema hidráulico fue del 61 %. La zona de baja frecuencia se produce por la acción de la masa cosechada y especialmente el flujo de caña a lo largo del surco. Se demostró en condiciones de campo el hecho de que el consumo de potencia en el árbol superior del aparato trozador es de un 30 % superior a la consumida por el tambor inferior. Esta información es la base para el proceso de desarrollo de estos sistemas mecánicos.

The study allowed to determine the perceptions and characterization of the pastures in farms of livestock producers and researchers in the Canton Sachas and Francisco Orellana, Province of Orellana, Ecuador, whose objective was to know the use and management of Amazonian tropical pastures. Seventeen cattle farms of 8 communities were characterized to observe the characterization of the farmers, land use, use of forage banks, pasture management and bovine cattle housing. A semi-structured interview was designed to collect primary information about the problem under investigation. When characterizing the farmers, in relation to land use, previously 47.5% of the producers were engaged in agriculture, today 85.9% carry out livestock work with silvopastoral practices and only 14.1% are dedicated to agriculture. production of coffee and cocoa. Regarding the use of feed banks, 35.29% have more food for their animals and 5.88% have better environmental conditions. In addition, 77.6% of the farmers mentioned that they have improved their production with the use of the feed bank. In summary, the results indicate that small and medium producers can benefit from silvopastoral systems as an alternative to improve production and not affect the environment.

All research responds to the need of solutions to a problem that directly or indirectly affects society. The development of the same largely certifies and determines the constant search for solutions. The main objective of the present study was to arrive at a clear conceptualization, as complete as possible, of some the most important terms that come up during an investigation design: Problematic Situation, Real Problem, Scientific Problem, and Object and Field, given the visible shortcomings observed in pre- and post-graduate theses when the research work is being developed and defended. The methodology consisted of basically developing a reflection around these terms (the vision that different authors have in this regard was very helpful), as well as the presentation of varied examples contributed to see the meaning of these important concepts more clearly. The study shows in a scientifically grounded way the achievement of the above. The way in which the presentation of the different concepts was handled removes any possibility of mistakes. Keywords: methodology scientific investigation, problem, object, field. Resumen Toda investigación parte del apremio en dar una respuesta a la solución de un problema que afecta de una manera directa o indirecta a la Sociedad. En gran medida, el propio desarrollo de la misma compulsa y determina esa constante búsqueda de soluciones. El objetivo principal del presente estudio fue llegar a una conceptualización clara, y lo más acabada posible, de algunos de los más importantes términos que se manejan durante el diseño de una investigación: Situación Problémica, Problema Real, Problema Científico, Objeto y Campo, dada las visibles falencias que se observan en tesistas de pre y postgrado a la hora de desarrollar y defender sus trabajos de investigación. La metodología consistió, básicamente, en desarrollar una reflexión en torno a estos términos; para lo cual resultó de gran ayuda la visión que tienen diferentes autores al respecto; así como, la exposición de variados ejemplos contribuyó a ver más definidamente el significado de estos importantes conceptos. El estudio muestra de forma científicamente fundamentada el logro de lo anterior. La forma en que se maneja la presentación de los diferentes conceptos aleja toda posibilidad de equívocos. Palabras clave: metodología investigación científica, problema, objeto, campo.