Equipment >Planters  May planting in Grundy County, Iowa Jun 07, 2011 1. John Deere row-crop tractor at work. 2. Hands-free precision planting with JD AutoTrac and StarFire GPS. 3. Unused row marker on planter. 4. High-residue corn stubble. 5. Coulter disks on planter make for an even seedbed. 6. John Deere's Central-Commodity System (CCS) for bulk seed delivery makes filling up with seed faster than individual row-seed hoppers. 7. Time for a break. 8. John Deere's Row Command lets driver shut off seed delivery by the row to save on seed when passing over no-plant zones.