Equipment · January 2026 · 5 min read
Planter calibration directly affects yield potential because uneven emergence and poor seed-to-soil contact cost bushels that no amount of fertilizer or chemistry can recover. Taking a few hours to check seed meters, depth, downforce, and closing wheels before the season starts pays dividends all year. Run warm-up rows in a nearby field and dig behind the planter to verify performance before heading to your best acres.
Test seed meters by catching seeds from each row unit into a bag while driving a measured distance. Compare the actual count to the target population and adjust meters or replace worn disks if any row deviates more than 3-5% from the target. Vacuum planters should hold consistent vacuum pressure across all rows.
Check singulation by running the planter on a hard surface and examining the seed spacing pattern. Doubles and skips should be below 2% for optimal performance. Worn finger pickups or dirty seed disks are the most common causes of poor singulation.
Set planting depth based on soil moisture conditions, not a fixed number. Corn needs a minimum of 1.5 inches, but planting at 2 inches in dry conditions ensures the seed reaches moisture. Soybeans do best at 1.25-1.5 inches. Dig behind the planter every time you move to a new field to verify depth.
Closing wheels must firmly close the seed trench without smearing wet soil into a sealed layer over the seed. Spiked or cast-iron closing wheels work better in wet conditions than smooth rubber. Adjust spring tension so the trench is closed but not packed hard.
Run 50-100 feet of warm-up rows at the start of each field, then stop and dig to check seed placement, depth, and trench closure. This five-minute check catches problems before they affect a full field. Replace worn disc openers, check chain tension, and grease all fittings before the season begins.
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Try the Fuel EstimatorCalibrate your planter monitor to match actual seed counts and acre measurements. A monitor that reads 2% high on population means you are under-planting every acre. Verify monitor accuracy against hand counts at least twice during planting season.
Mid-season stand counts confirm that planter calibration translated into a uniform crop. Count plants in multiple 1/1000th-acre sections across the field and compare to your target population. If stand counts consistently fall short, investigate seed meter wear, depth issues, or insect damage before the next planting season.