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Step 1:
Creating a Miniature Seedbed
| Ahead of each drill row the
leading cultivating discs (coulters) prepare a narrow seedbed of
finely tilled soil. |
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| The 180 kg of pre-load combined with the
unique vertical wave at point of entry into the soil allows the
blade to cut through the crop residue and penetrate the hardest
soils with a minimum amount of blade wear. |
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| The working
intensity of the coulters can be hydraulically altered from the
tractor seat to cultivate the ground between 0 and 15.5cm.
Manual adjustment allows for optimal depth setting to either
avoid sinking (soft soils) or lack of penetration (hard soils). |
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| The heavy-duty spring keeps the turbo-disc
in cultivating position at all times. Every coulter row has the
ability to pivot upward if the tip of the disc hits an obstacle
exceeding 180kg of point pressure. This feature protects blades in
rocky conditions and it extends the life of the entire coulter
assembly. |
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Importance of the coulters in no-till or
min-till conditions:
- To hasten microbial breakdown of the
residue, the residue needs to
- be cut into small pieces
- be in contact with the soil
- have access to moisture
- have access to oxygen
- The strip of exposed (dark) soil created
by the coulter is able to warm up enough for the seeds to
germinate quickly. This is very important in colder climates where
planting windows are very short
- Toxins released by the decomposing
residue are often a cause for disease. The coulters cut and clear
the residue away from the row eliminating immediate contact of the
plants with the residue.
- The coulters are set independently of the
double discs that do the actual planting. This is a primary
feature that sets Great Plains apart from single disc drills! The
planting depth is not affected by residue!
- Coulters minimize
hairpinning (click
for more information)
Coulters minimize sidewall compaction
(click for more information)
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