The objective of this study was to evaluate the individual and synergic effects of the application of Biochar (B), Humic Substances (HS), and Gypsum (G) on the soil properties of a saline–sodic soil, and plant growth and seed quality (polyphenols, protein and yield) of quinoa. Treatments included (B) 22 t ha−1, (HS) 5 kg ha−1, and (G) 47.7 t ha−1. Two quinoa genotypes from Arid Zones (AZ-51 and AZ-103) were selected and established in eight treatments. The B + HS + G combined treatment resulted in increases in root biomass of 206% and 176% in AZ-51 and AZ-103, respectively. Furthermore, electrical conductivity (ECe), sodium adsorption ratio (SAR), and exchangeable sodium percentage (ESP) decreased significantly in all treated soils. When compared to the control, ESP decreased 11-fold in the G treatment, and 9–13-fold in the B + G; B + HS; and B + HS + G treatments. Similarly, soil microbial biomass increased 112% and 322% in the B + HS + G treatment in AZ-51 and AZ-103 genotypes, respectively. Therefore, it can be concluded that the application of combined amendments (B + HS + G) represents an alternative for reclaiming degraded soils, including saline–sodic soils.
IntroducciónEl propósito de este estudio fue fomentar la transferencia de aprendizaje en el proceso de resolución de problemas de vigas estáticamente Objetivodeterminar sometidas a cargas concentradas y distribuidas para mejorar el rendimiento. Materiales MétodosLa edad de los estudiantes está comprendida entre 19 y 20 años. La unidad instruccional bajo estudio fue vigas sometidas a cargas concentradas y distribuidas, con una duración de 8 horas. Los instrumentos fueron la prueba de entrada y de salida, ellas contenían 4 problemas de desarrollo y eran iguales y tuvo una hora de duración cada una. ResultadosLos estudiantes antes de entrar a la intervención ya tenían los conocimientos de la primera y segunda condición de equilibrio y lo habían aplicado a otros tipos de estructuras. ConclusionesLos participantes habían aprendido los centroides de figuras planas.
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