El Perú como otros países de la amazonia diariamente sufren problemas de deforestación, en lo que respecta a la selva peruana específicamente en la selva alta para el cultivo de la coca la que después de un proceso de erradicación han dejado suelos abandonado, degradados no aptos para la agricultura, el uso de las leguminosas para recuperar suelos degradados están siendo utiliza, pero esta es poco estudiada aún más el uso de especies de leguminosas arbóreas a las que no se ha realizado una valoración económica en la recuperación de suelos degradados. El objetivo de este estudio es evaluar la recuperación de suelos degradados ex cocales mediante la siembra de Inga edulis con diferentes edades de siembra, a la vez hacerle la valoración económica por la incorporación del NPK hacia el suelo, determinado si existe diferencia significativa en relación con el tiempo de siembra...

This study analyzed the impact of leachate from a temporary landfill on soil microbial diversity in Tingo María, Huánuco region, Peru. Three treatments were used: untreated soil (S), addition of stream water (T0), leachate (T1), and leachate treated by coagulation and flocculation (T2), with 828.5 ml/week added in three weekly doses. Soil samples were collected from the Reserved Forest of the Universidad Nacional Agraria de la Selva. Twenty-one randomly distributed soil samples were taken and homogenized for analysis. Soil quality parameters measured included sand, clay, silt, texture, pH, organic matter, nitrogen, phosphorus and potassium. As for microorganisms, viable aerobes, lactobacilli, actinomycetes, fungi, nitrogen-fixing bacteria, and Escherichia coli were quantified using specific culture and counting methods for each of them. To evaluate the impact of the leachate on microbi...

In Peru, scientific journals are in constant growth, as they seek to make visible the scientific work of licensed public universities. In this sense, the objective of this research was to evaluate the historical evolution and future perspectives of scientific journals in Peru. The research was carried out by reviewing the official web pages of each institution, taking into account the official list of universities authorized by the Superintendencia Nacional de Educación Superior Universitaria (SUNEDU). We reviewed journals that are included in the Sistema Regional de Información en Línea para Revistas Científicas de América Latina, el Caribe, España y Portugal (Latindex Catálogo 2.0), SciELO, Web of Science (WOS) and Scopus. Data analysis was performed by tabulation in Excel and Minitab 19. We found 205 scientific journals, 51 are indexed in at least one database (Latindex Catálo...

The objective of this research was to evaluate the flocculant power of three types of starches, from white and yellow potato (Solanum tuberosum) and pituca (Colocasia esculenta) to remove turbidity in surface water. For this purpose, starch was extracted by mashing potatoes with a water/mass ratio of 1:4 and pituca with a ratio of 1:1, then sedimented and dried at 45 °C for 24 hours. Flocculant was prepared by dissolving 10 grams of starch in 250 ml of hot water at 60 °C and then boiled. Evaluation of the flocculant involved aluminum sulfate coagulation of the surface water, adjusting the pH to 9, and then coagulant was dosed until the pH was lowered to 6.9. The flocculant power of the starches was evaluated at doses of 0.3 ml and 0.5 ml per liter of water to be treated. The physicochemical parameters evaluated were measured before and after the addition of the starch flocculants. The ...