Now showing items 193-212 of 320

    • Modelling approaches for mixed forests dynamics prognosis. Research gaps and opportunities 

      Bravo, F.; Fabrika, Marek; Ammer, Christian; Barreiro, Susana; Bielak, Kamil; Coll Mir, Lluís; Fonseca, T.; Kangur, Ahto; Löf, Magnus; Merganičová, Katarina; Pach, Maciej; Pretzsch, Hans; Stojanović, Dejan; Schuler, Laura; Peric, Sanja; Rötzer, Thomas; del Río, Miren; Dodan, Martina; Bravo Oviedo, Andrés (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), 2019-04-29)
      Aim of study: Modelling of forest growth and dynamics has focused mainly on pure stands. Mixed-forest management lacks systematic procedures to forecast the impact of silvicultural actions. The main objective of the present ...
    • Modelling bird species richness with neural networks for forest landscape management in NE Spain 

      Gil Tena, Assumpció; Vega García, Cristina; Brotons, Lluís; Saura Martínez de Toda, Santiago (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2010)
      Para preservar la biodiversidad de los ecosistemas forestales de la Europa mediterránea en escenarios actuales y futuros de cambio global mediante una gestión forestal sostenible es necesario determinar cómo influye el ...
    • Modelling temporal variation of fire-occurrence towards the dynamic prediction of human wildfire ignition danger in northeast Spain 

      Martín, Yago; Zúñiga Antón, María; Rodrigues Mimbrero, Marcos (Taylor & Francis, 2018)
      Models of human-caused ignition probability are typically developed from static or structural points of view. This research analyzes the intra-annual dimension of fire occurrence and fire-triggering factors in NE Spain ...
    • Modelling the effect of climate-induced changes in recruitment and juvenile growth on mixed-forest dynamics: the case of montane-subalpine Pyrenean ecotones 

      Améztegui González, Aitor; Coll Mir, Lluís; Messier, Christian (Elsevier, 2015)
      Most predictive models forecast significant upward displacement of forest species due to increases in temperatures, but not all the species respond in the same way to changes in climate. In temperate or mountain systems, ...
    • Morphological and physiological responses of beech (Fagus sylvatica) seedlings to grass-induced belowground competition 

      Coll Mir, Lluís; Balandier, Philippe; Picon-Cochard, Catherine (Oxford University Press, 2004-01-01)
      We examined morphological and physiological responses of beech (Fagus sylvatica L.) seedlings to grass-induced belowground competition in full-light conditions. Two-year-old beech seedlings were grown during two growing ...
    • Multi-modal deep learning for Fuji apple detection using RGB-D cameras and their radiometric capabilities 

      Gené Mola, Jordi; Vilaplana Besler, Verónica; Rosell Polo, Joan Ramon; Morros Rubió, Josep Ramon; Ruiz Hidalgo, Javier; Gregorio López, Eduard (Elsevier, 2019-05-10)
      Fruit detection and localization will be essential for future agronomic management of fruit crops, with applications in yield prediction, yield mapping and automated harvesting. RGB-D cameras are promising sensors for fruit ...
    • Multi-tree woody structure reconstruction from mobile terrestrial laser scanner point clouds based on a dual neighbourhood connectivity graph algorithm 

      Méndez, Valeriano; Rosell Polo, Joan Ramon; Pascual Roca, Miquel; Escolà i Agustí, Alexandre (Elsevier, 2016)
      A process is presented for the vector reconstruction of fruit plantations based on the model developed by Verroust and Lazarus. To solve occlusion problems, the use of a dual graph of local and extended connectivity is ...
    • Nitrogen forms affect root structure and water uptake in the hybrid poplar 

      Domenicano, Susy; Coll Mir, Lluís; Messier, Christian; Berninger, Frank (Springer Nature, 2011-03-02)
      The study analyses the effects of two different forms of nitrogen fertilisation (nitrate and ammonium) on root structure and water uptake of two hybrid poplar (Populus maximowiczii x P. balsamifera) clones in a field ...
    • Nonextensive thermodynamic functions in the Schrödinger-Gibbs ensemble 

      Alonso, J. L.; Castro, Alberto; Clemente-Gallardo, Jesús; Cuchí Oterino, J. C.; Echenique, Pablo; Esteve, J. G.; Falceto, Fernando (American Physical Society, 2015)
      Schrödinger suggested that thermodynamical functions cannot be based on the gratuitous allegation that quantum-mechanical levels (typically the orthogonal eigenstates of the Hamiltonian operator) are the only allowed states ...
    • Normas para la correcta aplicación de productos fitosanitarios 

      Planas de Martí, Santiago (Eumedia, 2003)
      Los criterios técnicos y la percepción social sobre el empleo de los productos fitosanitarios están evolu- cionando en el sentido de disponer de las máximas garan- tías sobre la salud de las perso- nas y el medio ...
    • Novedades en mecanización de repoblaciones forestales 

      Pemán García, Jesús; Arnó i Pujol, Judit (Eumedia, 1998)
      A diferencia de la maquinaria que se utiliza en los aprovechamientos forestales, la mecanización de las repoblaciones ha permitido hasta hoy el empleo de equipos y máquinas que no requieren demasiada especialización y ...
    • Nuevas tecnologías aplicadas a los tratamientos en frutales 

      Escolà i Agustí, Alexandre (Eumedia, 2006)
      La necesidad de mejorar la calidad de las producciones y de reducir el impacto ambiental de las operaciones de distribución de productos fitosanitarios, junto con la mejora de los equipos electrónicos embarcados está ...
    • Nuevos neumáticos para tractores agrícolas 

      Arnó i Pujol, Judit; Masip Vilalta, Joan (Eumedia, 1997)
      El neumático agrícola condiciona de forma determinante el rendimiento del tractor. Es necesario, por tanto, que el agricultar conozca las prestaciones de los neumáticos actuales. Ello le permitirá elegir el equipamiento ...
    • Obtaining the three-dimensional structure of tree orchards from remote 2D terrestrial LIDAR scanning 

      Rosell Polo, Joan Ramon; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume; Ribes Dasi, Manuel; Masip Vilalta, Joan; Escolà i Agustí, Alexandre; Camp, Ferran; Solanelles Batlle, Francesc; Gràcia, Felip; Gil Moya, Emilio; Val, Luis; Planas de Martí, Santiago; Palacín Roca, Jordi (Elsevier, 2009)
      In recent years, LIDAR (light detection and ranging) sensors have been widely used to measure environmental parameters such as the structural characteristics of trees, crops and forests. Knowledge of the structural ...
    • Operación en el campo: gestión en terrenos específicos utilizando tecnologías de aplicación variable 

      Escolà i Agustí, Alexandre; Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio (New Ag International SARL, 2018-10-15)
      La última etapa del ciclo de Agricultura de Precisión (AP) consiste en implementar las decisiones tomadas en los campos o huertos.Desde el primer artículo de la sección 'Precision Ag Corner' (NewAg International 64, en ...
    • Operation in the field: site-specific management using variable rate technologies 

      Escolà i Agustí, Alexandre; Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio (New Ag International SARL, 2018-10-01)
      The last stage in the Precision Agriculture (PA) cycle is implementing the decisions made in the fields or orchards. From the first Precision Ag Corner (New Ag International 64, in Nov-Dec 2016), we described the different ...
    • Optimizing prescribed fire allocation for managing fire risk in central Catalonia 

      Alcasena Urdíroz, Fermín J.; Ager, Alan A.; Salis, Michele; Day, Michelle A.; Vega García, Cristina (Elsevier, 2018-04-15)
      We used spatial optimization to allocate and prioritize prescribed fire treatments in the fire-prone Bages County, central Catalonia (northeastern Spain). The goal of this study was to identify suitable strategic locations ...
    • Orange tree canopy volume estimation by manual and LiDAR-based methods 

      Colaço, André F.; Trevisan, Rodrigo G.; Molin, José P.; Rosell Polo, Joan Ramon; Escolà i Agustí, Alexandre (The Animal Consortium, 2017-07-16)
      LiDAR (Light detection and ranging) technology is an alternative to current manual methods of canopy geometry estimations in orange trees. The objective of this work was to compare different types of canopy volume estimations ...
    • Parameter design of a biaxial lidar ceilometer 

      Gregorio López, Eduard; Rocadenbosch Burillo, Francesc; Tiana Alsina, Jordi; Comerón Tejero, Adolfo; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon (Society of Photo-Optical Instrumentation Engineers, 2012)
      This paper presents parameter design methodology and related optomechanical engineering of a 905-nm diode-laser biaxial, eye-safe lidar ceilometer prototype for cloud-height monitoring. Starting with a brief review of the ...
    • Perceptions of climate change across the Canadian forest sector: the key factors of institutional and geographical environment 

      Améztegui González, Aitor; Solarik, Kevin A.; Parkins, John R.; Houle, Daniel; Messier, Christian; Gravel, Dominique (Public Library of Science, 2018)
      Assessing the perception of key stakeholders within the forest sector is critical to evaluating their readiness to engage in adapting to climate change. Here, we report the results of the most comprehensive survey carried ...