1. Weed monitoring methods Svend Christensen & Torben Heisel Danish Institute of Agricultural Sciences

2. Outline zRemote sensing? zNear ground sensing?

3. Satellite image

4. Spot Image K-J/Sat 53-236/9 1999-5-18 Giesegård

5. Manual sensing - weed mapping – DM - patch spraying...... 1 0.6 0.2 0.6 0.2 1

6. Historical weed maps – DM - patch spraying 0.6 0.2 0.6 0.2 B C A11 hollow wet dry

7. Historical map – manual sensing – DM- weed mapping - patch spraying 0.6 0.2 0.6 0.2 B C A1 1.....

8. Real time sensing – patch spraying ()

9. Weed sensing – manuel sensing – weed mapping – DM – patch spraying 0 25 10 0 0.3 0.6 1..

10. Weed sensing – weed mapping – DM - patch spraying 0 25 10 0 0.3 0.6 1