Now showing items 1-20 of 93

    • Assessment of Recycling Tunnel Sprayers in Mediterranean Vineyards and Apple Orchards 

      Planas de Martí, Santiago; Solanelles Batlle, Francesc; Fillat, A. (Elsevier, 2002)
      The use of air-assisted recycling tunnel sprayers in Mediterranean fruit orchards and vineyards was assessed by comparing the performance of two tunnel sprayer prototypes with an air-assisted axial flow sprayer. Field ...
    • Center-pivot automatization for agrochemical use 

      Palacín Roca, Jordi; Salse, José Antonio; Clua, Xavier; Arnó Satorra, Jaume; Blanco Ortiz, Ricardo; Zanuy, C. (Elsevier, 2005)
      This paper presents an agrochemical application system that could be incorporated into existing irrigating center-pivots. The system consisted of a hydraulic circuit with emitters, where the dose was individually controlled ...
    • An Electronic Control System for Pesticide Application Proportional to the Canopy Width of Tree Crops 

      Solanelles Batlle, Francesc; Escolà i Agustí, Alexandre; Planas de Martí, Santiago; Rosell Polo, Joan Ramon; Camp, Ferran; Gràcia, Felip (Elsevier, 2006)
      A prototype of an electronic control system based on ultrasonic sensors and proportional solenoid valves for a proportional application to the canopy width of tree crops was mounted on an air-assisted sprayer. The sprayer ...
    • Variable rate application of plant protection products in vineyard using ultrasonic sensors 

      Gil Moya, Emilio; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Planas de Martí, Santiago; Val, Luis (Elsevier, 2007)
      The changes in the shape and size of vines during the growing season require a continuous adjustment of the applied dose to optimize spray application efficiency. Target detection with ultrasonic sensors can be used to ...
    • Real-time tree-foliage surface estimation using a ground laser scanner 

      Palacín Roca, Jordi; Pallejà Cabrè, Tomàs; Tresánchez Ribes, Marcel; Ribes Dasi, Manuel; Llorens Calveras, Jordi; Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Masip Vilalta, Joan; Arnó Satorra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2007)
      The optimization of most pesticide and fertilizer applications is based on overall grove conditions. In this work we measurements. Recently, Wei [9, 10] used a terrestrial propose a measurement system based on a ground ...
    • 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 ...
    • A tractor-mounted scanning LIDAR for the non-destructive measurement of vegetative volume and surface area of tree-row plantations: a comparison with conventional destructive measurements 

      Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Arnó Satorra, Jaume; Escolà i Agustí, Alexandre; Ribes Dasi, Manuel; Masip Vilalta, Joan; Camp, Ferran; Gràcia, Felip; Solanelles Batlle, Francesc; Pallejà Cabrè, Tomàs; Val, Luis; Planas de Martí, Santiago; Gil Moya, Emilio; Palacín Roca, Jordi (Elsevier, 2009)
      The use of a low-cost tractor-mounted scanning Light Detection and Ranging (LIDAR) system for capable of making non-destructive recordings of tree-row structure in orchards and vineyards is described. Field tests consisted ...
    • Review. Precision viticulture. Research topics, challenges and opportunities in site-specific vineyard management 

      Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio; Ribes Dasi, Manuel; Rosell Polo, Joan Ramon (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2009)
      Precision Viticulture (PV) is a concept that is beginning to have an impact on the wine-growing sector. Its practical implementation is dependant on various technological developments: crop sensors and yield monitors, local ...
    • Deposición transversal de líquido de las boquillas de doble abanico TTJ60-11004 y TTJ60-11002 en distintas condiciones operacionales 

      Viana, R.G.; Ferreira, L.R.; Rosell Polo, Joan Ramon; Solanelles Batlle, Francesc; Machado, M.S.; Machado, A.F.L. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2009)
      El objetivo de este trabajo fue el de evaluar la deposición transversal de caldo de las boquillas pulverizadoras de doble abanico TTJ60-11004 y TTJ60-11002 en distintas condiciones operacionales. Se utilizaron 5 muestras ...
    • Design of a decision support method to determine volume rate for vineyard spraying 

      Gil Moya, Emilio; Escolà i Agustí, Alexandre (American Society of Agricultural and Biological Engineers, 2009)
      Dose determination in crops such as grapevine, which develops a large canopy within a relatively short period of time, becomes a key factor on the final success of plant protection product (PPP) application. Efficacy of ...
    • Applying precision feeding techniques in growing-finishing pig operations 

      Pomar, Càndido; Hauschild, Luciano; Zhang, Guo-Hua; Pomar Gomà, Jesús; Lovatto, Paolo Alberto (Sociedade Brasileira de Zootecnia, 2009)
      The high cost of feed ingredients, the use of non-renewable sources of phosphate and the dramatic increase in the environmental load resulting from the excessive land application of manure are major challenges for the ...
    • Distribuição volumétrica e espectro de gotas de pontas de pulverização de baixa deriva 

      Viana, R.G.; Ferreira, L.R.; Ferreira, M.C.; Teixeira, M.M.; Rosell Polo, Joan Ramon; Tuffi Santos, L.D.; Machado, A.F.L. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2010)
      Objetivou-se neste trabalho avaliar a distribuição volumétrica e o espectro de gotas das pontas de pulverização de baixa deriva TTI110015, AI110015 e AVI11001 sob diferentes condições operacionais. A distribuição volumétrica ...
    • Distribuição de líquido da ponta de pulverização com indução de ar e jato excêntrico AIUB 8502 sob diferentes condições 

      Viana, R.G.; Ferreira, L.R.; Rosell Polo, Joan Ramon; Solanelles Batlle, Francesc; Filat, A.; Machado, M.S.; Machado, A.F.L.; Silva, M.C.C. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2010)
      Objetivou-se com este trabalho avaliar a distribuição de líquido da ponta de pulverização com indução de ar e jato excêntrico AIUB 8502 sob diferentes condições operacionais. Foram avaliados perfil individual, vazão, ângulo ...
    • Protocolo para la zonificación intraparcelaria de la viña para vendimia selectiva a partir de imágenes multiespectratrales 

      Martínez Casasnovas, José Antonio; Agelet Fernández, J.; Arnó Satorra, Jaume; Bordes Aymerich, Xavier; Ramos Martín, Ma. C. (Ma. Concepción) (Asociación Española de Teledetección, 2010)
      En este trabajo se presenta un protocolo para la zonificación intraparcelaria de la viña con la finalidad de vendimia selectiva. Se basa en la adquisición de una imagen multiespectral detallada en el momento del envero, a ...
    • Sensitivity of tree volume measurement to trajectory errors from a terrestrial LIDAR scanner 

      Pallejà Cabrè, Tomàs; Tresánchez Ribes, Marcel; Teixidó Cairol, Mercè; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon; Palacín Roca, Jordi (Elsevier, 2010)
      The use of terrestrial LIDARs in agriculture enables the measurement of structural parameters of the orchards such as the volume of the trees. The sequence of two-dimensional scans performed with a LIDAR attached to a ...
    • Variable rate dosing in precision viticulture: Use of electronic devices to improve application efficiency 

      Llorens Calveras, Jordi; Gil Moya, Emilio; Llop, Jordi; Escolà i Agustí, Alexandre (Elsevier, 2010-03)
      Two different spray application methods were compared in three vine varieties at different crop stages. A conventional spray application with a constant volume rate per unit ground area (1 ha(-1)) was compared with a ...
    • Weed discrimination using ultrasonic sensors 

      Andújar, Dionisio; Escolà i Agustí, Alexandre; Dorado, José; Fernández-Quintanilla, César (John Wiley & Sons, 2011)
      A new approach is described for automatic discrimination between grasses and broad-leaved weeds, based on their heights. An ultrasonic sensor was mounted on the front of a tractor, pointing vertically down in the inter-row ...
    • Clustering of grape yield maps to delineate site-specific management zones 

      Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio; Ribes Dasi, Manuel; Rosell Polo, Joan Ramon (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2011)
      Zonal management in vineyards requires the prior delineation of stable yield zones within the parcel. Among the different methodologies used for zone delineation, cluster analysis of yield data from several years is one ...
    • Evaluation of peach tree growth characteristics under different irrigation strategies by LIDAR system: preliminary results 

      Pascual Roca, Miquel; Villar Mir, Josep Ma.; Rufat i Lamarca, Josep; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume (International Society for Horticultural Science (ISHS), 2011)
      In a four-year experiment on peach (Prunus persica L. Batsch ‘Andross’) for fruit processing, canopy volume and tree shape were evaluated by scanning trees with a Light Detection and Ranging (LIDAR) system: a non-destructive ...
    • Innovative LIDAR 3D dynamic measurement system to estimate fruit-tree leaf area 

      Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Escolà i Agustí, Alexandre; Arnó Satorra, Jaume; Ribes Dasi, Manuel; Masip Vilalta, Joan; Camp, Ferran; Gràcia Aguilà, Felipe José; Solanelles Batlle, Francesc; Planas de Martí, Santiago; Pallejà Cabrè, Tomàs; Palacín Roca, Jordi; Gregorio López, Eduard; Del Moral Martínez, Ignacio; Rosell Polo, Joan Ramon (Molecular Diversity Preservation International (MDPI), 2011)
      In this work, a LIDAR-based 3D Dynamic Measurement System is presented and evaluated for the geometric characterization of tree crops. Using this measurement system, trees were scanned from two opposing sides to obtain two ...