991 resultados para Impuestos-Valencia-S. XVII
Resumo:
Most studies on measures of transpiration of plants, especially woody fruit, relies on methods of heat supply in the trunk. This study aimed to calibrate the Thermal Dissipation Probe Method (TDP) to estimate the transpiration, study the effects of natural thermal gradients and determine the relation between outside diameter and area of xylem in 'Valencia' orange young plants. TDP were installed in 40 orange plants of 15 months old, planted in boxes of 500 L, in a greenhouse. It was tested the correction of the natural thermal differences (DTN) for the estimation based on two unheated probes. The area of the conductive section was related to the outside diameter of the stem by means of polynomial regression. The equation for estimation of sap flow was calibrated having as standard lysimeter measures of a representative plant. The angular coefficient of the equation for estimating sap flow was adjusted by minimizing the absolute deviation between the sap flow and daily transpiration measured by lysimeter. Based on these results, it was concluded that the method of TDP, adjusting the original calibration and correction of the DTN, was effective in transpiration assessment.
Resumo:
Premio Extraordinario, Área de Humanidades
Resumo:
Premio Extraordinario, Área de Humanidades
Resumo:
[ES]El presente estudio pretende introducir una serie de propuestas cuyo contraste empírico resulta dificultoso en ocasiones por encontrarse relacionado con actividades económicas que ofrecen un escaso rastro documental, como son la gestión de rentas bajo la fórmula de arriendo o la influencia del contrabando sobre el consumo real de un producto como el tabaco. El propósito en este sentido es diverso: profundizar en el conocimiento de las fórmulas y géneros que abastecen el monopolio tabaquero durante el siglo XVII; analizar los cambios introducidos en la gestión de la renta durante el primer tercio del XVIII dirigidos a obtener un mayor control sobre el monopolio tabaquero; y, finalmente, abordar la importancia creciente durante la segunda mitad de la centuria dieciochesca de las adquisiciones de tabaco de humo con respecto al inicial dominio del consumo de tabaco polvo