What population is everyone planting corn, and what row spacing?
32,000 on 30” centers non- irrigated.
30k on 30’s irrigated. 24k on 30’s dry
In central Illinois we plant at 34,500 but planning to increase this year to around 36,500. Had FBN non gmo hybrid last year and ears filled all the way to the tips so going to increase population. Seed cost is lower with these varieties and thinking with normal rainfall could pick up a few bushels per acre in yield.
We variable rate from 16-28000 in dry land in South Dakota on 20" rows. Still learning
20 inch rows. Variable rate from 28 to 38 based on soil type. 9 to 14 percent slopes erosion control is excellent added benefit for us. Beans same row spacing In row plant to plant spacing increased allowing us to push pops higher on better dirt
38,000 on 20” rows
30” rows, planting Rx varying from 33K to 37k.
Central, IL; heavy soils.
30" rows centeral ND
2018 flat poped 29-31k collected crop insurance
2019 VR population 18-24k personal best crop.
In eastern sd. Variable rate from 32-38k 30in rows non irrigated
You can't just pick one population and go. Depends on the hybrid, the soil type and yeild goal. We have hybrids that yeild 220 bushel at 30,000 and have other hybrids that yeild 220 at 38,500 on our farm. All on 30 inch.
Variable rate is the only way to go, regardless of where you are at in the U. S. We have a lot of elevation change in our fields and we vary from 20K to 32K and usually average around 27K to 28K, depending on the field. In 2018, our farm average was 200 bu/ac and average seed drop was 27.5K. (SE North Dakota...out of the RRV). It takes time to get to the right population for each zone, but it takes less population than you think to hit yield goals. Less population results in less stress during times with less moisture. We take the seed savings and roll it into fertilizer. My belief is that guys should have less population and more fertilizer and you will have less stress on your corn.
34,000 on 30 inch rows in central Iowa. Going to plant some prescriptions next year on some fields we haven’t done before so will see how that goes.
On full irrigated I’m planting 25-32k on 30” spacing, on dryland it’s 12-14k on 30” and on semi irrigated it’s 15-19k on 30” centers
I’d really like to try some 60” corn on dryland this year, I may just shut off some row units for a pass or two and give it a try.
40” dry land corn 28k and cotton 44k. We avg around 150 bushel corn and 2ba/acre cotton
36K on everything
30" row spacing
29-33k variable rate on irrigated 36” row spacing
Mostly 28k dryland and 34k irrigated. Looking for more flex hybrids to lower the irrigated <32k for better interseeded cover crops at V1-V4 for more sun light into the canopy. All 30” rows
I divide my yeild goal by 7
200 bushel is about 28,500
250 is closer to 36
On better ground I thing you could divide by 7.5 or even 8 but a few more seeds per acre is good insurance. I plant twin row 30's
How did you come up with 7 to divide by?
My own population plots. I do one every year with 2 verities to keep it simple. Flex hybrids can change the data but doesn't seem like there are many out there anymore that really flex like they use to. Corn can produce 10 bushel per 1000 seeds but not consistently. At least my findings
Variable rate 28-35,000 irrigated 22 dry land
15" Corn- average 37,000 pop, VRT most anywhere from 24 -38K
33,500 irrigated in 36” rows
Variable rate 16-24K on dry land in 30” rows trying lower pops every year with more flex
Variable rate all acres corn and soybeans with range from 26000 to 36000 on corn and depends on variety and and field in 22 inch rows, 80 to 130 on soybeans, maybe moving lower on soybeans if we figure out the way to get more branching and pods per plant soybeans also planted in 22 inch
We plant from 34,000 to 36,000 on 30" rows depending on variety. We plant early and all corn on corn and hope for a final harvest stand of 32K to 34K depending on the field.
34k on 30"
we variable rate everything but a general average is 34000
32 to 33,000 pop on 30 in rows
30k on 22"
10-15K on 30". Low rainfall, low pop.
Irrigated 24-34K on 30” rows
Dryland 12-15K on 30” rows
2019 dryland yields went above 170bpa whole field average
25-26k on 36" rows dryland SE SD
30” rows in central OH, 33.6k was our best ROI over the past 8 years of variable rate on all of our soil types. Non irrigated. We plant rate based on historical yield potential not soil types since elevation plays a big part in available N and water. We vary most fields between 27-34,000
Variable Rate on some fields, but generally 36k on 20 inch rows. Non Irrigated.
36.5 in ec Illinois good ground / 33.5 to 34 on lesser soil, there are a few 20" and a couple split row here but 95% are good old fashion 30". The prescription rates are available and may be viable but so far my tech savvy is not up to it.
35,00 in 20’ rows
30" rows variable rate last couple of years 24000-36000. We have been doing our own population trials. We are finding that we get very similar yields at lower populations across all soil types.
Often the highest yielding population was far below the average population. Many times under 30000 plants /acre. We are going to keep experimenting, the results have been surprising to us.
One big bonus besides the seed savings has been much less lodging. Except in the trials we are not going to plant anything above 32000 next year.
We are looking at planting 60in Corn this year with a cover/forage between rows. Anyone have experience with this?