El presente trabajo se realizó entre Noviembre de 1988 -a marzo de 1909 en el Distrito de Morales, Sector "Cumbacillo", Provincia y departamento de San Martín, situado a 60° 29’ Latitud Sur, 76 ° 21' Longitud Oeste y a una altitud de 300 metros sobre el nivel del mar. Se evaluó el rendimiento y las características vegetativas complementarias de líneas, híbridos y variedad de maíces tropicales, empleando el diseño estadístico de Látice Simple Rectangular parcialmente balanceado con 56 tratamientos y 2 repeticiones, cuyos resultados fueron analizados mediante la prueba de Variancia y la Significación de la Diferencia Mínima Significativa al 5/. de probabilidad. El suelo experimental fue de origen aluvial de superficie plana y mecanizada, de reacción ligeramente ácida (pH 6. 5), con bajos contenidos de materia orgánica (1.5%), Nitrógeno, Fósforo (3.0 p.p.m) y normal de ...

The impacts made in a sparse tropical forest with bale in the southern Amazon rainforest of Peru by various activities of extraction of natural resources, can be restored with the appropriate measures and procedures that must be initiated before deforestation, during activities and later with revegetation. To minimize the impacts and compensate for deforestation, it is necessary to design a strategy for the restoration of the tropical forest in the intervened area to achieve a recovery of the affected ecosystem and seek to give a direct benefit to the communities by supporting their self-sustainable development. The resulting indicators must be monitored for 3 years, with physical visits and an additional 10 years using remote technology.

This article presents a forward-looking approach to occupational mobility of artisanal fishermen from Ecuador to changing the productive matrix of the country and the improvement of working conditions in their craft piques ports, through a quantitative analysis of their aspirations and occupational expectations. The methodology to be considered is the use of secondary data collected through a survey administered to 392 fishermen in the five major artisanal fishing ports of Ecuador, Puerto Aconcito and Santa Rosa in the province of Santa Elena, Puerto Jaramijo and the San Mateo Manabí province and Puerto La Poza of the Province of Esmeraldas. The results indicate that there is an element of identity that defines the guidelines for the ocupacionalidad of fishermen in terms of their occupational aspirations and expectations that fishermen cast for themselves and their children. At a subjec...

Este artículo expone un acercamiento a la prospectiva de la movilidad ocupacional de los pescadores artesanales del Ecuador ante el cambio de la matriz productiva del país, al mejoramiento de las condiciones de trabajo en sus puertos pequeros artesanales y al apoyo al sector pesquero artesanal, a través de un análisis cuantitativo de sus aspiraciones y expectativas ocupacionales. La metodología que se consideró es el uso de datos secundarios recolectados a través de una encuesta administrada a 392 pescadores en los cinco principales puertos pesqueros artesanales del Ecuador, Puerto Aconcito y Santa Rosa de la provincia de Santa Elena, Puerto Jaramijo y San Mateo de la provincia d,e Manabí y Puerto La Poza de la Provincia de Esmeraldas. Los resultados indican que existe un componente de identidad que define las pautas sobre la ocupacionalidad de los pescadores en términos de sus ...

The objective of this research work was to evaluate the transformation of the forest area in the Huacamayo River Micro-basin. 6 Landsat satellite photographs from the years 1999, 2010, 2014, 2016, 2018, 2020 were used. During 1999-2010 a loss of 13.5 km2 of forest cover was observed, the periods 2014, 2018, 2020, showed progressive retreat of the forest tropical humid, 4.4 km2, 3.1 km2 and 7.5 km2, respectively. In the 21 years, 28.5 km2 of forest in the Micro-basin have been lost, reporting a percentage of deforestation -1.2% per year; Between 1999-2010, the highest deforestation rate was observed, -1.7%. For the year 2031, the model for the tropical forest in the Microbasin estimated a resulting area of 39 km2, demonstrating its progressive decrease. This study will guide the conservation and management of the forest area of the Microbasin.

This research aimed to determine the application conditions that affect cholinesterase levels, and generate a neurotoxic risk by the use of carbamates and organophosphates to tomato farmers (Solanum lycopersicum L.) in the town of San Luis, Chimborazo - Ecuador. The technique used was spectrophotometry. Cholinesterase examination was carried out in patients exposed to organophosphate and carbamate insecticides. The method used was the kinetic spectrophotometric (405 nm at 37 °C). Through factor analysis, the Kruskal Wallis and correlations were determined, the variables that affect cholinesterase levels. For the neurotoxicological analysis, it was applied, the questionnaire Psychologisch Neurologischeò Fragebogen (PNF) to each of the farmers, which allowed us to determine the presence of, clinical disorders, behavioral and neurological, in workers exposed to organophosphate and carbama...

In the present work, the morphometric and functional characteristics of the Teaone river sub-basin were studied, using geographic information systemtools, as an input for land use planning. Digital global elevation models from the Advanced Spaceborne Thermal Emission and Reflection Radiometer(ASTER-GDEM) were used. Among the most outstanding parameters we have that the Teaone river sub-basin has an area of 504,66 km2, aperimeter of 138,48 km, a shape factor of 0,27; which means that it is not prone to flash floods; and a compactness index of 1,74 that expresses theelongated shape of the sub-basin, with a low water concentration and unlikely recurrent floods.

Esta investigación tuvo el objetivo determinar las condiciones de aplicación que afectan los niveles de colinesterasa, y que generan un riesgo neurotóxico por el uso de carbamatos y organofosforados a los agricultores de tomate (Solanum lycopersicum L) en la localidad de San Luis, Chimborazo – Ecuador. La técnica utilizada fue la espectrofotometría. El examen de colinesterasa se realizó a los pacientes expuestos a los insecticidas organofosforados y carbamatos. El método utilizado fue el cinético-espectrofotométrico (405 nm a 37°C). Mediante análisis factorial, prueba de Kruskal Wallis y de correlaciones se determinó las variables que más afectan los niveles de colinesterasa. Para el análisis neurotoxicologico se aplicó el cuestionario Psychologisch Neurologischeò Fragebogen (PNF) a cada uno de los agricultores, lo que permitió determinar la presencia de alteraciones c...