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Papers by VICTORIANO MARCELO GABELLA
Agronomy, 2019
Water status controls plant physiology and is key to managing vineyard grape quality and yield. W... more Water status controls plant physiology and is key to managing vineyard grape quality and yield. Water status is usually estimated by leaf water potential (LWP), which is measured using a pressure chamber; however, this method is difficult, time-consuming, and error-prone. While traditional spectral methods based on leaf reflectance are faster and non-destructive, most are based on vegetation indices derived from satellite imagery (and so only take into account discrete bandwidths) and do not take full advantage of modern hyperspectral sensors that capture spectral reflectance for thousands of wavelengths. We used partial least squares regression (PLSR) to predict LWP from reflectance values (wavelength 350–2500 nm) captured with a field spectroradiometer. We first identified wavelength ranges that minimized regression error. We then tested several common data pre-processing methods to analyze the impact on PLSR prediction precision, finding that derivative pre-processing increased t...
Teledetección [Recurso electrónico]: hacia una visión global del cambio climático, 2019, ISBN 978-84-1320-038-5, págs. 71-74, 2019
El cultivo de la manzana Reineta tiene gran importancia en la comarca de El Bierzo, situada en le... more El cultivo de la manzana Reineta tiene gran importancia en la comarca de El Bierzo, situada en le noroeste de la provincia de Leon (Espana). Esta variedad presenta caracteristicas peculiares, que la distingue de otras manzanas Reinetas producidas en la peninsula y que han permitido su calificaicon como Denominacion de Origen "Manzana Reineta del Bierzo". El elevado porcentaje de destrio obtenido, al realizar la seleccion de la fruta fresca acogida a la Denominacion de Origen, plantea su aprovechamiento en forma de productos derivados, como puede ser la manzana asada. Con este trabajo se ha buscado desarrollar un proceso industrial de asado de la manzana Reineta que permita la obtencion de un producto de calidad, estable y listo para el consumo. Aunque el asado de esta manzana en los hogares Bercianos es una practica habitual y muy arraigada en el tiempo, en la bibliografia consultada no se han encontrado esudios relacionados con el tema. El estudio se ha iniciado en el lab...
Spanish Journal of Agricultural Research, 2011
Molybdenum (Mo) plays an important role in increasing chickpea yield. In 2009, we studied the eff... more Molybdenum (Mo) plays an important role in increasing chickpea yield. In 2009, we studied the effects of different Mo application times and techniques on the response of the Kabuli chickpea (Cicer arietinum) to Mo nutrition. Pot experiments were conducted under natural conditions using two different soils from northwest Spain and following a factorial statistical pattern (7 × 2) with six replicates for each soil. A treatment of 2 mg Mo pot-1 was added to the pots at six different moments, 1 to 6 weeks after emergence (WAE), using two different application techniques (soil and foliar). Both growth and yield were affected by Mo application, but yield was more affected than total dry matter. The response was greater in the medium acid soil than in the neutral-slightly basic soil. At maturity, plants fertilized at 4 WAE produced a greater seed yield, mainly due to an increase in the number of pods per plant. Foliar Mo application was more effective, and soil Mo application should be carried out earlier in the cycle. An interaction was found between time and technique of Mo application, with the highest yield being obtained when Mo was applied at 4 WAE using foliar fertilization. Additional key words: dry matter; foliar and soil application; Kabuli type chickpea; pot experiments; yield components. Resumen Efecto de diferentes épocas y técnicas de aplicación de molibdeno sobre el crecimiento y rendimiento del garbanzo El molibdeno (Mo) juega un papel importante en el incremento del rendimiento del garbanzo. Se estudió durante
Spanish Journal of Agricultural Research, 2009
Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean regio... more Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean region, being Spain a major European chickpea-producing country. Despite its importance, there are few studies on micronutrient application to chickpea. Nevertheless, widespread deficiencies in mineral nutrients in the soils, together with low moisture supply are considered the major environmental stresses leading toward yield loss in chickpea (Khan, 1998). Among the micronutrients, zinc (Zn) deficiency is perhaps the most widespread (Roy et al., 2006). Chickpea is generally considered sensitive to Zn deficiency (Khan, 1998), although there are differences among varieties (Khan, 1998; Khan et al., 1998). In neutral to alkaline soils where chickpea is usually grown, Zn deficiency can often be encountered (Roy et al., 2006). Zn uptake is positively correlated with soil organic matter and negatively correlated with soil phosphorus
Spanish Journal of Agricultural Research, 2010
Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean regio... more Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean region, and Spain is the main chickpea-producer in Europe, 31,600 ha and 30,100 t in 2008 (FAO, 2010). Despite its importance, few studies have been conducted to analyse the application of micronutrients to chickpea. Although
Land Use Policy, 2017
The National Network of Silos and Granaries, where Spanish farmers once pooled and stored their w... more The National Network of Silos and Granaries, where Spanish farmers once pooled and stored their wheat for sale to the State monopsony, was built in 1951-1990. Of the 952 storage units identified in this study, 670 are vertical or silos and 282 horizontal or granaries. With the phase-out of interventionist policies, both types gradually became redundant and were abandoned altogether after 2001. While the granaries are now being reused, the silos constitute an expense that the government is trying to elude by auctioning them off. This paper discusses the development and geographic distribution of grain storage units, focusing on the most prominent characteristics of 50 silos in the Castilla y León region and the changes in their condition over a 5 year period. The silos studied, located in major grain farming areas, grew in size and technological sophistication during the 40 years of network activity. The importance of these structures as part of Spain's agro-industrial heritage is stressed and the few instances in which they have been converted for use as museums, lookouts or theatres are described. Proposals pending implementation for their repurposing as restaurants, event and exhibition venues, offices, theatres or wildlife conservation sites are also discussed. The examples of such reuse found in other autonomous communities may be extrapolated to the silos in Castilla y León. The indicators analysed would appear to infer that such proposals or other similar projects are only feasible in villages with a certain threshold population.
Agronomy, 2019
Water status controls plant physiology and is key to managing vineyard grape quality and yield. W... more Water status controls plant physiology and is key to managing vineyard grape quality and yield. Water status is usually estimated by leaf water potential (LWP), which is measured using a pressure chamber; however, this method is difficult, time-consuming, and error-prone. While traditional spectral methods based on leaf reflectance are faster and non-destructive, most are based on vegetation indices derived from satellite imagery (and so only take into account discrete bandwidths) and do not take full advantage of modern hyperspectral sensors that capture spectral reflectance for thousands of wavelengths. We used partial least squares regression (PLSR) to predict LWP from reflectance values (wavelength 350–2500 nm) captured with a field spectroradiometer. We first identified wavelength ranges that minimized regression error. We then tested several common data pre-processing methods to analyze the impact on PLSR prediction precision, finding that derivative pre-processing increased t...
Teledetección [Recurso electrónico]: hacia una visión global del cambio climático, 2019, ISBN 978-84-1320-038-5, págs. 71-74, 2019
El cultivo de la manzana Reineta tiene gran importancia en la comarca de El Bierzo, situada en le... more El cultivo de la manzana Reineta tiene gran importancia en la comarca de El Bierzo, situada en le noroeste de la provincia de Leon (Espana). Esta variedad presenta caracteristicas peculiares, que la distingue de otras manzanas Reinetas producidas en la peninsula y que han permitido su calificaicon como Denominacion de Origen "Manzana Reineta del Bierzo". El elevado porcentaje de destrio obtenido, al realizar la seleccion de la fruta fresca acogida a la Denominacion de Origen, plantea su aprovechamiento en forma de productos derivados, como puede ser la manzana asada. Con este trabajo se ha buscado desarrollar un proceso industrial de asado de la manzana Reineta que permita la obtencion de un producto de calidad, estable y listo para el consumo. Aunque el asado de esta manzana en los hogares Bercianos es una practica habitual y muy arraigada en el tiempo, en la bibliografia consultada no se han encontrado esudios relacionados con el tema. El estudio se ha iniciado en el lab...
Spanish Journal of Agricultural Research, 2011
Molybdenum (Mo) plays an important role in increasing chickpea yield. In 2009, we studied the eff... more Molybdenum (Mo) plays an important role in increasing chickpea yield. In 2009, we studied the effects of different Mo application times and techniques on the response of the Kabuli chickpea (Cicer arietinum) to Mo nutrition. Pot experiments were conducted under natural conditions using two different soils from northwest Spain and following a factorial statistical pattern (7 × 2) with six replicates for each soil. A treatment of 2 mg Mo pot-1 was added to the pots at six different moments, 1 to 6 weeks after emergence (WAE), using two different application techniques (soil and foliar). Both growth and yield were affected by Mo application, but yield was more affected than total dry matter. The response was greater in the medium acid soil than in the neutral-slightly basic soil. At maturity, plants fertilized at 4 WAE produced a greater seed yield, mainly due to an increase in the number of pods per plant. Foliar Mo application was more effective, and soil Mo application should be carried out earlier in the cycle. An interaction was found between time and technique of Mo application, with the highest yield being obtained when Mo was applied at 4 WAE using foliar fertilization. Additional key words: dry matter; foliar and soil application; Kabuli type chickpea; pot experiments; yield components. Resumen Efecto de diferentes épocas y técnicas de aplicación de molibdeno sobre el crecimiento y rendimiento del garbanzo El molibdeno (Mo) juega un papel importante en el incremento del rendimiento del garbanzo. Se estudió durante
Spanish Journal of Agricultural Research, 2009
Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean regio... more Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean region, being Spain a major European chickpea-producing country. Despite its importance, there are few studies on micronutrient application to chickpea. Nevertheless, widespread deficiencies in mineral nutrients in the soils, together with low moisture supply are considered the major environmental stresses leading toward yield loss in chickpea (Khan, 1998). Among the micronutrients, zinc (Zn) deficiency is perhaps the most widespread (Roy et al., 2006). Chickpea is generally considered sensitive to Zn deficiency (Khan, 1998), although there are differences among varieties (Khan, 1998; Khan et al., 1998). In neutral to alkaline soils where chickpea is usually grown, Zn deficiency can often be encountered (Roy et al., 2006). Zn uptake is positively correlated with soil organic matter and negatively correlated with soil phosphorus
Spanish Journal of Agricultural Research, 2010
Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean regio... more Chickpea (Cicer arietinum L.) is the principal grain legume crop grown in the Mediterranean region, and Spain is the main chickpea-producer in Europe, 31,600 ha and 30,100 t in 2008 (FAO, 2010). Despite its importance, few studies have been conducted to analyse the application of micronutrients to chickpea. Although
Land Use Policy, 2017
The National Network of Silos and Granaries, where Spanish farmers once pooled and stored their w... more The National Network of Silos and Granaries, where Spanish farmers once pooled and stored their wheat for sale to the State monopsony, was built in 1951-1990. Of the 952 storage units identified in this study, 670 are vertical or silos and 282 horizontal or granaries. With the phase-out of interventionist policies, both types gradually became redundant and were abandoned altogether after 2001. While the granaries are now being reused, the silos constitute an expense that the government is trying to elude by auctioning them off. This paper discusses the development and geographic distribution of grain storage units, focusing on the most prominent characteristics of 50 silos in the Castilla y León region and the changes in their condition over a 5 year period. The silos studied, located in major grain farming areas, grew in size and technological sophistication during the 40 years of network activity. The importance of these structures as part of Spain's agro-industrial heritage is stressed and the few instances in which they have been converted for use as museums, lookouts or theatres are described. Proposals pending implementation for their repurposing as restaurants, event and exhibition venues, offices, theatres or wildlife conservation sites are also discussed. The examples of such reuse found in other autonomous communities may be extrapolated to the silos in Castilla y León. The indicators analysed would appear to infer that such proposals or other similar projects are only feasible in villages with a certain threshold population.