http://hdl.handle.net/2117/1739 2013-05-24T12:38:56Z http://hdl.handle.net/2117/17841 Title: Technological or tradicional tools for documents correction? A Case study in higher education Authors: Kallas, Zein; Ornat Longarón, Cèsar 2013-02-18T14:43:45Z http://hdl.handle.net/2117/17205 Title: Leaf area index estimation in vineyards using a ground-based LiDAR scanner Authors: Arnó, Jaume; Escolá, Alexandre; Vallès, Josep Maria; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Masip, Joan; Palacín Roca, Jordi; Rosell Polo, Joan Ramon Abstract: 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 index (LAI) is probably the most widely used in viticulture. To assess the feasibility of using light detection and ranging (LiDAR) sensors for predicting the LAI, several field trials were performed using a tractormounted LiDAR system. This system measured the crop in a transverse direction along the rows of vines and geometric and structural parameters were computed. The parameters evaluated were the height of the vines (H), the cross-sectional area (A), the canopy volume (V) and the tree area index (TAI). This last parameter was formulated as the ratio of the crop estimated area per unit ground area, using a local Poisson distribution to approximate the laser beam transmission probability within vines. In order to compare the calculated indexes with the actual values of LAI, the scanned vines were defoliated to obtain LAI values for different row sections. Linear regression analysis showed a good correlation (R2 = 0.81) between canopy volume and the measured values of LAI for 1 m long sections. Nevertheless, the best estimation of the LAI was given by the TAI (R2 = 0.92) for the same length, confirming LiDAR sensors as an interesting option for foliage characterization of grapevines. However, current limitations exist related to the complexity of data process and to the need to accumulate a sufficient number of scans to adequately estimate the LAI. 2013-01-08T09:33:01Z http://hdl.handle.net/2117/15263 Title: Performance of an Ultrasonic Ranging Sensor in Apple Tree Canopies Authors: Gil Moya, Emilio; Escolà Agustí, Alexandre; Planas de Martí, Santiago; Rosell Polo, Joan Ramon; Pomar Gomá, Jesús; Camp Feria-Carot, Fernando; Solanelles Batlle, Francesc; Gràcia Aguila, Felip; Llorens Calveras, Jordi 2012-02-20T16:08:30Z http://hdl.handle.net/2117/12054 Title: Passeig ecofisiològic per l'espai i pel temps: l'estudi de les alteracions produïdes pels canvis climàtics i atmosfèrics en l'estructura i el funcionament de les plantes i dels ecosistemes terrestres Authors: Munné Bosch, Sergi; Peñuelas, Josep; Filella, Iolanda; Estiarte, Marc; Llusià, Joan; Ogaya, Romà; Ribas, Ángela; Llorens, Laura; Mangirón, Marta; Terradas, Jaume; Lloret, Francisco; Rodà, Ferran; Castells, Eva; Oliveira, Graça; Serrano Porta, Lydia; Sardans, Jordi; Asensio, Dolores; Prieto, Patricia; Bruna, Paula 2011-03-24T15:45:30Z http://hdl.handle.net/2117/11352 Title: Prueba de campo del tractor McCormick CX 100 Authors: Gil Moya, Emilio; Llorens Calveras, Jordi 2011-02-14T11:23:48Z http://hdl.handle.net/2117/11351 Title: Familia Landini. Trío de versatilidades. REX 90, ALPINE 85 y 5H-110 Authors: Gil Moya, Emilio; Llorens Calveras, Jordi; Garcia Ruiz, Francisco; Llop Casamada, Jordi 2011-02-14T11:04:33Z http://hdl.handle.net/2117/11339 Title: Aplicación variable de fitosanitarios en viña utilizando sensores de ultrasonidos. Ajuste del volumen en función de las características de la vegetación. Authors: Llorens Calveras, Jordi; Llop Casamada, Jordi; Gil Moya, Emilio 2011-02-11T13:50:35Z http://hdl.handle.net/2117/10954 Title: Assessing vineyard water status using the reflectance based Water Index Authors: Serrano Porta, Lydia; González Flor, Cristina; Gorchs Altarriba, Gil 2011-01-11T12:33:49Z http://hdl.handle.net/2117/10822 Title: Effects of leaf structure on reflectance estimates of chlorophyll content Authors: Serrano Porta, Lydia 2010-12-29T14:41:41Z http://hdl.handle.net/2117/10633 Title: Occurrence of Pasteuria spp. in the northeastern Spain Authors: Verdejo Lucas, Soledad; Español Pons, Montserrat; Ornat Longarón, Cèsar; Sorribas Royo, Francisco Javier Abstract: The occurrence of Pasteuria spp. In Spanish oils is reported. A total of 160 soil samples were collected from vegetable crops, kiwi and citrus orchards, and deciduous fruit trees. Bacteria were found associated with six nematode genera but they were only observed within females of Meloidogyne spp., second-stage juveniles and males of Tylenchulus semipenetrans, and juveniles of Pratylenchus spp. 2010-12-16T10:41:54Z http://hdl.handle.net/2117/10386 Title: Soil water availability affects green area and biomass growth of Cynodon dactylon Authors: de Abelleyra, Diego; Verdú González, Antoni Maria Claret; Kruk, Betina Claudia; Satorre, Emilio Horacio Abstract: Bermuda grass (Cynodon dactylon) is a stoloniferous and rhizomatous prostrate weed displaying high growth rates under non-limiting conditions. Radiation has been considered the major factor affecting C. dactylon patch extension and biomass growth, but little is known about the influence of water availability on those processes. C. dactylon green area and biomass growth were analysed in response to different soil water conditions. Four experiments comprising eight drought treatments were carried out during 2 years at different dates, to generate a wide range of soil water and evaporative demand conditions. Significant reductions in weed green area and biomass growth were found between treatments when low soil water conditions were imposed. Reductions in green area were of greater magnitude than reductions in biomass, suggesting a higher effect of drought on green area increment. There were significant (P < 0.05) relationships between green area increment and cumulative incident radiation, although slopes [relative green area growth rates (RGAGR)] differed among treatments. A strong logistic relationship was found between RGAGR and the ratio of plant-available soil water to potential evapotranspiration. The approach and parameters generated in this work can be used to predict C. dactylon growth changes under rain-fed conditions. 2010-11-24T10:24:18Z http://hdl.handle.net/2117/10318 Title: Ecofisiología de las relaciones hídricas de la Actinidia en el Maresme Authors: Savé, Robert; Serrano Porta, Lydia 2010-11-16T15:44:52Z http://hdl.handle.net/2117/9504 Title: Obtaining the three-dimensional structure of tree orchards from remote 2D terrestrial LIDAR scanning Authors: Palacín Roca, Jordi; Planas de Martí, Santiago; Val Manterola, Luís; Gil Moya, Emilio; Gracia Vilalta, Felipe; Solanelles Batlle, Francesc; Rosell Polo, Joan Ramon; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume; Ribes-Dasi, Manel; Masip Vilalta, Joan; Camp Feria-Carot, Fernando; Escolà Agustí, Alexandre 2010-10-07T09:19:04Z http://hdl.handle.net/2117/9091 Title: Demography of Digitaria sanguinalis: effect of the emergence time on survival , reproduction, and biomass Authors: Gallart González-Palacio, Montserrat; Mas Serra, Maite; Verdú González, Antoni Maria Claret 2010-09-26T17:51:51Z http://hdl.handle.net/2117/9055 Title: 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 Authors: Gil Moya, Emilio; Planas de Martí, Santiago; Val Manterola, Luís; Pallejà, Tomàs; Solanelles Batlle, Francesc; Gràcia Aguila, Felip; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Llorens Calveras, Jordi; Arnó, Jaume; Escolà Agustí, Alexandre; Masip, Joan; Ribes-Dasi, Manel; Camp Feria-Carot, Fernando 2010-09-23T09:39:24Z