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Recommended Restrictor and Gate Settings

Adjust your Agrowdrill seed roller restrictors to suit fine or coarse seed and fertiliser.

May 2, 2022
Recommended Restrictor and Gate Settings

The seed rollers in Agrowdrill seed drills have both a fine and a coarse side. This allows large and small seeds to be accurately metered without having to completely rebuild your seed roller assembly. 

Seed Roller and Restrictor Illustration

How to Reposition Restrictors:

    1. Grasp the rear arm of the restrictor and gently twist the arm sideways to release it from under the adjustable stopper and remove it. 
    2. Re-insert the restrictor into the new position or leave out as required. You should feel the restrictor click firmly into place. 

CAUTION: Check the hopper is free of obstructions. Do not use material which is not granular and consistent. Sieve any material which might have clumps or been exposed to moisture. Do not use fertilizer which has been left exposed to the air or has started to cake.

Recommended Settings:

Use the information below in combination with the Agrowdrill calibration procedure to correctly calibrate your seed drill for a range of common seeds and fertilisers. 

Seed/fertiliser

Gate setting

Restrictors fitted
Lupins 1 None
Barley 0.6 2 of 4
Oats 0.8 None
Wheat 0.6 2 of 4
Sorghum 0.6 2 of 4
Canola 0.2 3 of 4 (leave fine tooth exposed)
Sub clover 0.2 3 of 4 (leave fine tooth exposed)
Lucerne 0.2 3 of 4 (leave fine tooth exposed)
Ryegrass 0.2 2 of 4
Single super 0.8 None or 2 of 4
DAP 0.6 None or 2 of 4
Urea 0.6 2 of 4

 Restrictor Positioning:

Restrictor Settings
Previous article How to Calibrate the Agrowdrill AD140 (and AD130)
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