Corn sometimes emerges unevenly because of environmental conditions beyond the control of growers. However, timely planter servicing and adjustment, as well as appropriate management practices, can help prevent many stand uniformity problems. The following are some tips for improving the uniformity of seed placement during planting. Keep the planting speed within the range specified in the planter's manual. Match the seed grade with the planter plate. Check planters with finger pickups for wear on the back plate and brush (use a feeler gauge to check tension on the fingers, and then tighten them correctly). Check for wear on double-disc openers and seed tubes. Make sure the sprocket settings on the planter transmission are correct. Check for worn chains, stiff chain links, and improper tire pressure. Make sure seed drop tubes are clean and clear of any obstructions. Clean seed tube sensors if a planter monitor is being used. Make sure coulters and disc openers are aligned. Match the air pressure to the weight of the seed being planted. Make planter adjustments and follow lubricant recommendations when using seed-applied insecticides (e.g., Poncho and Cruiser).
For more information on this and other topics related to corn production, contact your state extension corn specialist or your local extension educator/agent.
Following is the link to the corn extension specialists: state extension corn specialist.
