The 2 nd International Conference on: Novel and Sustainable Weed Management in Arid and Semi-Arid Agro-Ecosystems. Site specific weed management: mapping the tempo-spatial development of purple nutsedge ( Cyperus rotundus ) Hanan Eizenberg Tal Naamat, Ran Lati , Tal Miller and Roy Efron
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Site specific weed management: mapping the tempo-spatial development of purple nutsedge (Cyperusrotundus)
Tal Naamat, Ran Lati, Tal Millerand Roy Efron
Dept. of Weed Research, ARO, NeweYa’ar Research Center, Ramat Yishay 30095, Israel
Modeling spatial growth for the above and sub-surface
RGB high resolution camera; 0.5x0.5 mm pixel size. Lati et al. Minirhyzotronnon destructive video camera. Naamat et al.
RGB high resolution camera; 0.5x0.5 pixel size. 3D LIDAR
scenes and photogrammetric. Lati et al. RGB high resolution camera; 1x1mm pixel size. Efron et al.
Close range remote sensing
Aerial RGB high resolution camera; 50x50mm pixel size.
Tal Miller et al.
Far range remote sensing
Monitoring the sub-surface development of purple nutsedge using minirhyzotron video camera
Developing a robust method for purple nutsedge detection under varies light conditions
How to overcome the shading effect?
Above soil surface
Purple nutsedge spatial growth model
Color digital camera
Ranging - travel time based measurement
Knowledge of the laser beam direction determination of point in space
Direct measurement of 3D coordinates of the objects in space
Panoramic scan - complete 3D depiction of the surveyed scene can be achieved – generates 3D point clouds
Laser Scanner (principles)
Field Of View
Field Of View
ECPA - July 2008
Secondary Classified Image
Remote sensing for purple nutsedge detection
Input of meteorological data (T°C; PAR)
RGB, NIR, LIDAR
Soil Sub-surface model
Above surface growth sub-model
Developing an algorithm for weed detection – range related
Fixing data into GIS (using GPS)
Creating a purple nutsedge spatial distribution map
Taking home massage
Integration of the biological and technological means for purple nutsedge detection support and complements each other, and may provide a new dimensions in its precision management.