Presentation at the Workshop on Crop Production Equipment for the System of Rice Intensification (SRI) Presenters: Chaminda Fernando and G. A. S. Ginigidarra, Sri Lanka Title: Experience in building inter-row weeders for small-scale farmers Date: November 1, 2014 Venue: ACISAI, Asian Institute of Technology, Thailand

1. Three Row Weeder Development
Sri Lankan experience
Collaborative research by Oxfam and
Rajarata University of Sri Lanka

2. Learning / experience on Weed
management
• Changing the soil structure during land
preparation through different soil fertility
enhancement practices
• Managing the weeds around the field/ bunds
and controlling weeds types and weeds
propagation
• Controling weeds through a weeder

3. The purpose of the weeder
-Weed
controlling
-Aeration
-Soil structure
improvement

4. 6 types of modified weeders

5. Japan Rotary weeder
Drum width ; 14 cm
Required Spacing between the
rows; 13.5cm
Boat length; 17 cm
Weight; 5.500 kg

6. Single row Cono weeder
-Drum width ; 11 cm
-Required Spacing between the
rows; 14.5 cm
-Boat length; 28 cm
-Weight; 4.100 kg

7. Single row cono weeder
Drum width ; 19 cm
Required Spacing between the
rows; 22 cm
Boat length; 26 cm
Weight; 5.300 kg

8. Two Row Cono
weeder
-Drum width ; 13 cm
-Required Spacing
between the rows; 18 cm
-Boat length; 17 cm
-Weight; 6.300 kg

9. Three row four drums cono weeder
Drum width ; 14 cm
Required Spacing between the
rows; 13 cm
Boat length; 28 cm
Weight; 7.700 kg

10. Three rows three drums cono weeder
Drum width ; 14 cm
Required Spacing between the
rows; 21 cm
Boat length; 13 cm
Weight; 10.100 kg

12. Practical field comparison of different
weeders at an average paddy field in
Sri Lanka
• Video

13. Thank you very much