Checking Seed Population

NOTE: When planting at a shallow depth with the closing wheels raised, seeds may tend to roll or bounce. This will affect seed spacing accuracy.

1. Attach a short chain at points (A) to one or more sets of closing wheels, so seed trench remains open.

2. Set depth-adjusting handle (B) two settings from minimum setting.

3. Plant a short distance and check to see if seeds are visible in trench. Adjust depth-adjusting handle if necessary.

4. Plant approximately 91 m (100 yd).

5. Consult charts and determine what distance equals 1/1000 of a hectare, 1/1000 of an acre or 1/200 of an acre as it relates to the row width being planted.

A52533

Chaining Up Closing Wheels


A-Chain Attachment Points
B-Depth-Adjusting Handle

Distance to Plant for Population Check
  Row Width Being Planted
Fraction of Acre 15 in. 18 in. 19 in. 20 in. 22 in. 30 in. 36 in. 38 in. 40 in.
1/1000 if population is more than 100,000 seeds/acre 34.8 ft 24.0 ft 27.6 ft 26.1 ft 23.8 ft 17.4 ft 14.5 ft 13.8 ft 13.1 ft
1/200 if population is less than 100,000 seeds/acre 174 ft 145 ft 138 ft 131 ft 119 ft 87 ft 72.5 ft 69 ft 66 ft

 

Distance to Plant for Population Check
  Row Width Being Planted
Fraction of Hectare 38 cm 46 cm 48 cm 51 cm 56 cm 70 cm 76 cm 91 cm 97 cm 101 cm
1/1000 26.24 m 21.88 m 20.72 m 19.68 m 17.90 m 14.29 m 13.12 m 10.94 m 10.36 m 9.84 m

 

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6. Mark distance selected with flags (A).

NOTE: When planting at a shallow depth with closing wheels raised, seeds may tend to roll or bounce. This will affect seed spacing accuracy.

7. Count seeds (B) between flags.

8. If 1/1000 of an acre was marked off, multiply number of seeds counted by 1000.

If 1/200 of an acre was marked off, multiply number of seeds counted by 200.

If 1/1000 of a hectare was marked off, multiply number of seeds counted by 1000.

If in-field checks indicate that machine is planting at a rate significantly different than seed transmission rate chart indicates, investigate the following in the order listed:

1. Ensure that ALL transmission sprockets are set according to rate chart.
2. Excessive unit bounce can cause low population and reduced spacing control. Increase unit downforce or drive slower to reduce excessive unit bounce.
3. Ensure that machine drive-wheel slippage is close to normal. Crop residue, tire inflation pressure, soil conditions and unit downforce can cause variations in drive-wheel slippage.

FOR VACUUM METER ONLY:

If all other settings are correct and if population is too high, vacuum level can be reduced in one inch increments until correct population is achieved. If actual population is too low, vacuum level can be increased in half inch to one inch increments until correct population is achieved.

A39155


A-Flag
B-Seeds

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