Due to the COVID-19 pandemic, the study modality changed from face-to-face to virtual, and the teaching-learning process changed drastically. Therefore, it was necessary to determine the effect of this pandemic on the academic performance of essential subjects that are part of the curriculum in most higher education careers. This research used the observational and analytical method on 101 students enrolled in the Mining career and a balanced factorial mathematical model and separation of means according to a significance value of 0.05 (p<0.05). It was possible to determine that the academic performance of the students of the Mining career of the Escuela Superior Politécnica de Chimborazo in the basic subjects is different from the virtual average at least in a partial or in the final exam. In this case, it was significantly different in the second and third midterm, with the virtual performance being higher than the classroom performance.
Las leguminosas forrajeras, en general representan alto valor proteico; sin embargo, presentan limitaciones para su establecimiento debido a la latencia de las semillas. En función de ello, se evaluó la germinación de la semilla de Macroptilium atropurpureum, luego de recibir escarificación química con ácido sulfúrico al 96% en inmersión durante tres minutos, inmersión en agua caliente a 80ºC durante cinco minutos, en agua potable al ambiente durante 24 horas y un testigo (sin tratar). Se aplicó un diseño completamente aleatorizado con 15 repeticiones cada uno. Las variables cuantificadas fueron rendimiento de semillas, germinación y supervivencia de plántulas. Se encontraron 73000 semillas viables y 3% de impurezas por cada kilogramo de semilla recolectado. Las semillas tratadas con ácido sulfúrico fueron las que presentaron un mejor porcentaje de germinación y supervivencia (80 y 75.56%); seguida por las tratadas con agua a 80ºC (75.56 y 73.34%). La escarificación de semillas de leguminosas debe ser un procedimiento imprescindible, mismo que debe hacerse con un ácido sulfúrico concentrado por cuanto se encontraron los mejores resultados en germinación de semillas y supervivencia de plántulas
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