“Sunlight drives photosynthesis, which drives starch production, which drives yield,” explains Ken Ferrie. If sunlight hits the ground, it’s wasted, so maximizing sunlight capture requires closing rows as quickly as possible.
GDUs offer a more reliable method to predict corn emergence and development than using calendar days, according to yield champions David Hula and Randy Dowdy. They also offer their pro tip on how to assess planting and germination depth.
