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A. A. Solhjou, J. Fielke and J. Desbiolles Effect of narrow opener geometry on lateral surface soil movement and implicati...
Introduction Tined no-till opener
Excessive soil disturbance
<ul><li>Excessive soil disturbance by tined no-till openers leads to increased : </li></ul><ul><li>Depth of soil cover on ...
Material and Methods  <ul><li>A flat narrow point opener </li></ul><ul><li>Experimental design: randomized complete block ...
Rake angle
Tracers location before tillage
X-Y-Z digitising frame
Laser soil profile meter
Measuring bottom soil profile with laser
Tracer locations after tillage 90 ° 35 °
Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 35°
Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 53°
Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 72°
Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 90°
Tracer locations after tillage Cross section of soil profile and tracer locations - n= 2  (commercial bent leg opener) Ben...
Results <ul><li>Opener geometry strongly affects on patterns of surface soil movement.  </li></ul><ul><li>2. Flat opener r...
Results  4. Bent leg opener reduces lateral surface soil movement (pre- emergent herbicide) into adjacent furrow compare t...
Thank you
 
Commercial bent leg opener
Effect of rake angle on average lateral tracer movement
Tracer locations after tillage Cross section of soil profile and tracer locations - n= 2  (commercial bent leg opener)
Effect of rake angle on soil failure in the front of openers 35 ° 90°
Tracer locations after tillage for opener rake angle of 90° and commercial bent leg opener α = 90° Bent leg
Effect of rake angle on average lateral tracer movement
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Effect of narrow opener geometry on lateral surface soil movement and implications for no-till seeding. Aliakbar Solhjou

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A presentation made at the WCCA 2011 event in Brisbane, Australia.

Published in: Education, Technology

Effect of narrow opener geometry on lateral surface soil movement and implications for no-till seeding. Aliakbar Solhjou

  1. 1. A. A. Solhjou, J. Fielke and J. Desbiolles Effect of narrow opener geometry on lateral surface soil movement and implications for no-till seeding Barbara Hardy Institute – Agricultural Machinery Research and Design, University of South Australia 2011
  2. 2. Introduction Tined no-till opener
  3. 3. Excessive soil disturbance
  4. 4. <ul><li>Excessive soil disturbance by tined no-till openers leads to increased : </li></ul><ul><li>Depth of soil cover on alternate furrows </li></ul><ul><li>Pre- emergent herbicide contamination above the seed zone </li></ul><ul><li>Weed seed germination </li></ul><ul><li>Soil moisture loss </li></ul>Problems of excessive soil disturbance Poor seed germination
  5. 5. Material and Methods <ul><li>A flat narrow point opener </li></ul><ul><li>Experimental design: randomized complete block design with n= 4 rep. </li></ul><ul><li>Treatments: </li></ul><ul><li>Rake angles: 35 °, 53°, 72° and 90° </li></ul><ul><li>Forward speed (v) : 8.2 km/h </li></ul><ul><li>Work depth (d): 120 mm </li></ul><ul><li>Commercial bent leg opener </li></ul><ul><li>V= 8.2 km/h and d= 120 mm- n=2 </li></ul>Bent leg opener Flat opener 1 2
  6. 6. Rake angle
  7. 7. Tracers location before tillage
  8. 8. X-Y-Z digitising frame
  9. 9. Laser soil profile meter
  10. 10. Measuring bottom soil profile with laser
  11. 11. Tracer locations after tillage 90 ° 35 °
  12. 12. Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 35°
  13. 13. Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 53°
  14. 14. Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 72°
  15. 15. Tracer locations after tillage Cross section of soil profile and tracer locations- n=4 α = 90°
  16. 16. Tracer locations after tillage Cross section of soil profile and tracer locations - n= 2 (commercial bent leg opener) Bent leg
  17. 17. Results <ul><li>Opener geometry strongly affects on patterns of surface soil movement. </li></ul><ul><li>2. Flat opener rake angles clear pre-emergent herbicide above seed zone. However, these rake angles move pre-emergent herbicide onto the adjacent furrow. </li></ul><ul><li>3. Bent leg opener reduces soil movement on the adjacent furrow (uniform seed germination). </li></ul>
  18. 18. Results 4. Bent leg opener reduces lateral surface soil movement (pre- emergent herbicide) into adjacent furrow compare to flat openers (crop safety).
  19. 19. Thank you
  20. 21. Commercial bent leg opener
  21. 22. Effect of rake angle on average lateral tracer movement
  22. 23. Tracer locations after tillage Cross section of soil profile and tracer locations - n= 2 (commercial bent leg opener)
  23. 24. Effect of rake angle on soil failure in the front of openers 35 ° 90°
  24. 25. Tracer locations after tillage for opener rake angle of 90° and commercial bent leg opener α = 90° Bent leg
  25. 26. Effect of rake angle on average lateral tracer movement

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