Now showing items 134-153 of 260

    • Land-use legacies rather than climate change are driving the recent upward shift of the mountain treeline in the Pyrenees 

      Améztegui González, Aitor; Coll Mir, Lluís; Brotons, Lluís; Ninot, Josep M. (Wiley, 2016)
      Aim To assess the effects of climate change, past land uses and physiography on the current position of the tree line in the Catalan Pyrenees and its dynamics between 1956 and 2006. Location More than 1000 linear kilometres ...
    • Large-scale determinants of diversity across Spanish forest habitats: accounting for model uncertainty in compositional and structural indicators 

      Martin Queller, Emilia Maria; Torras, O.; Solana, J.; Alberdi Asensi, Iciar; Saura Martínez de Toda, Santiago (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), 2011)
      An integral understanding of forest biodiversity requires the exploration of the many aspects it comprises and of the numerous potential determinants of their distribution. The landscape ecological approach provides a ...
    • Leaf area index estimation in vineyards using a ground-based LiDAR scanner 

      Arnó Satorra, Jaume; Escolà i Agustí, Alexandre; Vallès Petit, Josep Maria; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Masip Vilalta, Joan; Palacín Roca, Jordi; Rosell Polo, Joan Ramon (Springer, 2013)
      Estimation of grapevine vigour using mobile proximal sensors can provide an indirect method for determining grape yield and quality. Of the various indexes related to the characteristics of grapevine foliage, the leaf area ...
    • Lessons learned from arson wildfire incidence in reforestations and natural stands in Spain 

      Da Ponte, Emmanuel; Costafreda Aumedes, Sergi; Vega García, Cristina (MDPI, 2019-03-05)
      Wildfires are currently considered the major threat to forests in Mediterranean countries. It has been implied that a large percentage of arson-caused fires in Spain are connected with the extensive reforestation programs ...
    • LIDAR and non-LIDAR-based canopy parameters to estimate the leaf area in fruit trees and vineyard 

      Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Escolà i Agustí, Alexandre; Arnó Satorra, Jaume; Planas de Martí, Santiago; Román, Carla; Rosell Polo, Joan Ramon (Elsevier, 2018-06-22)
      This paper is based on two initial hypotheses, firstly, it is proposed that the vegetation volume obtained with a LIDAR-based system or tree row LIDAR volume (TRLV) has a high correlation with the leaf area (LA). Secondly, ...
    • LIDAR as an alternative to passive collectors to measure pesticide spray drift 

      Gregorio López, Eduard; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francesc; Solanelles Batlle, Francesc; Garcerá, Cruz; Chueca, Patricia; Arnó Satorra, Jaume; Moral Martínez, Ignacio del; Masip Vilalta, Joan; Camp, Ferran; Viana, R.G.; Escolà i Agustí, Alexandre; Gràcia, Felip; Planas de Martí, Santiago; Moltó, Enrique (Elsevier, 2014)
      Pesticide spray drift entails a series of risks and costs in terms of human, animal and environmental well-being. A proper understanding of this phenomenon is essential to minimise these risks. However, most conventional ...
    • LiDAR simulation in modelled orchards to optimise the use of terrestrial laser scanners and derived vegetative measures 

      Méndez, Valeriano; Catalán, Heliodoro; Rosell Polo, Joan Ramon; Arnó Satorra, Jaume; Sanz Cortiella, Ricardo (Elsevier, 2013)
      Light detection and ranging (LiDAR) technology is beginning to have an impact on agriculture. Canopy volume and/or fruit tree leaf area can be estimated using terrestrial laser sensors based on this technology. However, ...
    • Lidar: towards a new methodology for field measurement of spray drift 

      Gregorio López, Eduard; Torrent Martí, Xavier; Solanelles Batlle, Francesc; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francesc; Masip Vilalta, Joan; Ribes Dasi, Manuel; Planas de Martí, Santiago; Rosell Polo, Joan Ramon (Association of Applied Biologists, 2016)
      Lidar technology is becoming a promising alternative for spray drift measurement to the labour and time-expensive methodologies based on the ISO 22866 standard. This paper presents last advancements in an eye-safe lidar ...
    • Lo que los sensores nos dicen sobre las condiciones ambientales de los cultivos 

      Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio; Escolà i Agustí, Alexandre (New Ag International SARL, 2017-10-01)
      Nuestros bisabuelos y sus antepasados no utilizaban sensores, pero conocían perfectamente sus campos. Esto porque literalmente tenían los pies en la tierra. Ellos tenían que caminar por todos sus terrenos cuando sembraban, ...
    • Long-term analysis of soil water conservation and crop yield under different tillage systems in Mediterranean rainfed conditions 

      Lampurlanés Castel, Jorge; Plaza Bonilla, Daniel; Álvaro-Fuentes, Jorge; Cantero-Martínez, Carlos (Elsevier, 2016)
      This study focuses on the quantification of soil water storage and crop yield under different tillage systems in dryland semiarid Mediterranean conditions. Three long-term tillage experiments based on cereal production ...
    • Long-term no-till as a means to maintain soil surface structure in an agroecosystem transformed into irrigation 

      Pareja Sánchez, Evangelina; Plaza Bonilla, Daniel; Ramos Martín, Ma. C. (Ma. Concepción); Álvaro-Fuentes, Jorge; Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos (Elsevier, 2017)
      The aim of this study was to determine the most appropriate soil management to reduce the structural degradation of soils susceptible to crusting in Mediterranean areas recently transformed into irrigation. A long-term ...
    • Long-term yield and water use efficiency under various tillage systems in Mediterranean rainfed conditions 

      Cantero-Martínez, Carlos; Angás Pueyo, Pedro; Lampurlanés Castel, Jorge (Wiley, 2007)
      Conservation tillage (CT) can be beneficial for soil, water and soil organic matter conservation in Mediterranean areas that are prone to soil erosion and where water availability for crops is the main factor for ...
    • Los tratamientos fitosanitarios: un paso más hacia la calidad total 

      Planas de Martí, Santiago (Eumedia, 1994)
      En un momento en que la agricultura europea ve con incertidumbre los cambios que se avecinan e intenta alianzar políticas intervencionistas que se aseguren la supervivencia del sector, cabe preguntarse si es posible la ...
    • Managing stand density to enhance the adaptability of Scots pine stands to climate change: a modelling approach 

      Améztegui González, Aitor; Cabon, Antoine; De Cáceres, Miquel; Coll Mir, Lluís (Elsevier, 2017)
      In the Mediterranean region most climatic forecasts predict longer and more intense drought periods that can affect tree growth and mortality over broad geographic regions. One of the silvicultural treatments that has ...
    • Mapping vineyard leaf area using mobile terrestrial laser scanners: should rows be scanned on-the-go or discontinuosly sampled? 

      Moral Martínez, Ignacio del; Rosell Polo, Joan Ramon; Company Mesa, Joaquim; Sanz Cortiella, Ricardo; Escolà i Agustí, Alexandre; Masip Vilalta, Joan; Martínez Casasnovas, José Antonio; Arnó Satorra, Jaume (Molecular Diversity Preservation International, 2016-01-19)
      The leaf area index (LAI) is defined as the one-side leaf area per unit ground area, and is probably the most widely used index to characterize grapevine vigor. However, LAI varies spatially within vineyard plots. Mapping ...
    • Maquinaria para la explotación forestal 

      Arnó i Pujol, Judit (Eumedia, 1999)
      La mecanización de los aprovechamientos forestales madereros utiliza una maquinaria concebida especificamente para el trabajo de explotación forestal. Sin embargo, la escasa rentabilidad económica de nuestros bosques ha ...
    • Measurement errors in the use of smartphones as lowcost forestry hypsometers 

      Fernández López, Cristina; Villasante Plágaro, Antonio M. (Suomen Metsätieteellinen Seurary (Finnish Society of Forest Science)Finnish Forest Research Institute, 2014)
      Various applications currently available for Android allow the estimation of tree heights by using the 3D accelerometer on smartphones. Some make the estimation using the image on the screen, while in others, by pointing ...
    • Measurement of spray drift with a specifically designed lidar system 

      Gregorio López, Eduard; Torrent Martí, Xavier; Planas de Martí, Santiago; Solanelles Batlle, Francesc; Sanz Cortiella, Ricardo; Rocadenbosch Burillo, Francesc; Masip Vilalta, Joan; Rosell Polo, Joan Ramon; Ribes Dasi, Manuel (MDPI, 2016)
      Field measurements of spray drift are usually carried out by passive collectors and tracers. However, these methods are labour- and time-intensive and only provide point- and time-integrated measurements. Unlike these ...
    • Mechanical properties of wood from Pinus sylvestris L. treated with Light Organic Solvent Preservative and with waterbone Copper Azole 

      Villasante Plágaro, Antonio M.; Laina, Ruben; Rojas, J. A. M.; Rojas, I. M.; Vignote, Santiago (INIA, 2013)
      Aim of study: To determine the effect on wood from Pinus sylvestris of treatment with preservatives on mechanical properties and to establish the relation between the penetration and compression strenght. Area of study: ...
    • Mediterranean forest dynamics and forest bird distribution changes in the late 20th century 

      Gil Tena, Assumpció; Brotons, Lluís; Saura Martínez de Toda, Santiago (Wiley, 2009)
      Processes derived from global change such as land-use changes, climate warming or modifications in the perturbation regime may have opposite effects on forest extent and structure with still unknown consequences on forest ...