NWMO ‚ÄčCorn Row Spacing Study Results
There were four experiments this year using different corn row spacings at the Graves- Chapple Research Center. The comparison was 20-inch row spacing compared to 30-inch row spacing. There are many pros and cons for choosing row spacing. However, I would recommend considering yield first, and then consider efficiency, price, duplication and other factors.
Corn was planted in both row spacings at a planting population of 38,000 plants per acre. The results of the study indicated that 3 out of the 4 experiments showed significantly higher yields with 30-inch compared to 20-inch row spacing. The fourth hybrid was not significantly significant but still the 30-inch row spacing yielded more. This is one year of data and will this be repeatable?
So, being surprised at the results, we went back to the field after harvest and again made stand counts to ensure that our data was accurate. Our corn stands across row spacings were equal with harvest stand counts being from 33,000 to 34,000 plants per acre across all hybrids.
Well, stay tuned as we look toward repeating this information next year. We are very fortunate to have several people donate resources so we could build the planter to allow for easy movement of the planter units. It is an old plate planter but driven off the press wheels so we can easily slide units.
For more information, contact Wayne Flanary at 660-446-3724, Heather Benedict at 660-425-6434 or Wyatt Miller at 816-776-6961, Regional Agronomists, University of Missouri Extension.