Author/Authors :
Joan Ramon Rosell Polo، نويسنده , , Ricardo Sanz، نويسنده , , Jordi Llorens، نويسنده , , Jaume Arn?، نويسنده , , Alexandre Escolà، نويسنده , , Manel Ribes-Dasi، نويسنده , , Joan Masip، نويسنده , , Ferran Camp، نويسنده , , Felip Gràcia، نويسنده , , Francesc Solanelles، نويسنده , , Tomàs Pallejà، نويسنده , , Luis Val، نويسنده , , Santiago Planas، نويسنده , , Emilio Gil، نويسنده , , Jordi Palac?n، نويسنده ,
Abstract :
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 of several LIDAR measurements on both sides of the crop row, before and after defoliation of selected trees. Summary parameters describing the tree-row volume and the total crop surface area viewed by the LIDAR (expressed as a ratio with ground surface area) were derived using a suitable numerical algorithm. The results for apple and pear orchards and a wine producing vineyard were shown to be in reasonable agreement with the results derived from a destructive leaf sampling method. Also, good correlation was found between manual and sensor-based measurements of the vegetative volume of tree-row plantations. The Tree Area Index parameter, TAI, gave the best correlation between destructive and non-destructive (i.e. LIDAR-based) determinants of crop leaf area. The LIDAR system proved to be a powerful technique for low cost, prompt and non-destructive estimates of the volume and leaf-area characteristics of plants.
