By Alexander Lindsey, K. Nemergut, Peter Thomison, Ohio State University Extension
Timing corn emergence is key to minimize yield reductions, and can be more important for preserving yield than even seed spacing. When setting planting depth for corn this year, be sure to consider not just first emergence seen, but also the uniformity of the emergence.
In work conducted from 2017-2019, we manipulated seeding depth to be approximately 1, 2, or 3 inches deep (current recommendations are for planting at 1.5 to 2 inches deep) in two conventionally tilled fields. One field had 2% to 3% organic matter, and the other had 4% to 5% organic matter. We tracked daily emergence in the plots, and measured stalk strength and yield at the end of the season. Across years and fields, shallow planting resulted in faster emergence of the first plants in each year. However, the seeds that didn’t emerge were more subject to moisture fluctuation and took more time to go from 10% emerged to 90% emerged.… Continue readingRead More »