Central ND | Oliver1 - 4/29/2024 08:10
So the 22" corn was planted shallow, 1.25 to the seed maybe, and possibly too high of population. That shallow probably definitely hurt yields. Many people make the assumption when you go narrow row corn to crank up the rates. Don't. We plant 20" corn 500, maybe 1000 vs 30's, on average rates of 34K. What is your "normal" rate?
Depth on the 22" corn was 1.75" to the bottom of the seed trench, 1.5" to top of seed. I NEVER measure to the bottom, so it was 1.75" to top of seed on 30".
Base rate the last couple years on 30" corn has been 33k. Variable rates run from 26k to 38k. On the 22" corn, base rate was set at 35k, with lowest being 28k, and highest being 38k, as far as I know.
I just wish they would have used the same map, and it would have been planted at the exact same depth as the 30". Too many variables, not the least of which was different planter operators, to make it a relevant test. |
Measuring corn depth
