Vacuum Meter Operating CharacteristicsThe operating band (gray area) illustrates how vacuum meter performs in relation to desired population (indicated by horizontal line). Width of band is due to:
In most cases, vacuum meter planting accuracy does not decline unless maximum planting speed is exceeded. On the vacuum meter, maximum speed is often a result of field conditions. Rough field conditions can knock seed off seed disks and can cause row unit bounce which can severely affect seed placement. Adding attachments like pneumatic down-force can improve seed placement in rough field conditions. Always verify the correct seed disk is used for seed being planted. If the seed is unusually sized or shaped, a disk for a different crop may work better. See SEED DISK RECOMMENDATIONS in Preparing Vacuum Meter Section or your John Deere dealer. If seed varies widely in size and shape, a flat disk and doubles eliminator may provide better population control. A good way to check for proper seed disk is to remove meter from seed hopper, place seed in meter, connect vacuum hose to meter dome, activate vacuum to recommended level for crop, and turn meter by hand to verify only one seed (A) fits into each cell. |
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| CROP STAND = SEED SINGULATION + SEED PLACEMENT + AGRONOMIC FACTORS | |
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Seed Singulation = Seed Selection + Seed Disk Selection + Vacuum Level + Field Conditions + Maintenance |
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Seed Placement = Row Unit Maintenance + Speed + Field Conditions + Planter Attachments + Observation & Adjustment |
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Agronomic Factors = Seed Germination + Soil Temperature + Moisture + Nutrients + Pest Control + Weather |
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OUO6074,0000E2E -19-28JUN05-1/1 |