Not real sure there is any yield benefit from 15" to 30". The 15 will canopy earlier and help with weed control. I think they will feed through a bean head better. Downside is you have to run them over if you need to spray them once they are up. Around here they run 90 or 120' spray booms and skinny tires, so that isn't a huge issue.
AaronSEIA
 
(quoted from post at 14:51:05 04/16/13) Any opinions on far apart the rows should be on soybeans

Soybeans on 15" rows should out yield 30" rows by about 4 bushel per acre at the same population.
 
I've done 15", 18" with an air drill and currently plant them in 30". I think in certain years, narrow or wide has their own pros and cons. Me, I kind of like having one planter to take care of that will do both. Instead of spreading my "planter maintenance budget" on two planters or a planter and a drill, I make sure this one is working great with about any part it needs that will increase my accuracy. Couple that with a great monitor and that may be better than having two, plus one takes up less space in the barn. My 2 cents from this amateur.
 
My dad drilled beans, planted in 40" and 38". I have drilled a few, planted 38", 36", 30", and 15". My neighbor plants 30" for me with a Deere 24 X 30. Can"t tell much difference, I liked the 15" for weed control and lighter ground. He has planted some of his light ground twice since he has row shut offs. I would say on a wet year 30" and a dry year 15". Last year we had 60+ bpa with being a dry one. I do like the newer planters over a drill.
 
This part of the country you are liable to see anything but probably more 15 inch hard land than anything else.
 
Like they say, 7 to 30 inches, you can make a good case for any of them, see all around me.

Drilled beans are losing some fans, a drill isn't accurate enough with the high cost of seed. Lot of fellas went back to 30 inch because they save so much seed cost.

You can get beans that match, bushy or not, either way.

Some areas have white mold issues, helps to have a wider spacing for air to get in and keep the issue down.

Hard to go wrong, if you match the bean type to what you are doing.

I like the 15 inch bean bar I have, IHC 295 planter units on a 3pt bar, the 15 inch spacing seems the best compromise for me.

Paul
 
My renter plants corn and beans on 22 inch rows. Common in nearby sugar beet country. Beet farmers used to run two planters/cultivators, 22 bean and 30 inch corn.....went to 22. Planters and heads are commercially available in 22. Spraying works well with 14 inch wide tractor tires. Some run tractors with duals, some triples. His sprayer is an IH hi-clearance, like custom apps use. Single tires, 4WD. Beans canopy early, no white mold issue. Corn canopies early.
 
Several years ago many drills were sold for soybeans and I can only think of a couple guys still doing it.About the biggest drill was 30feet and in our area most new planters are 24 row 30 in.We tried 15in skip rows and the advantage if any was offset by time and equiptment.
 
We like 15" rows here in southern IL they will outyield 30" beans by 3-5 bu. on the average and you can get the population down under 140,000 without compromising the canopy coverage. Since we have a no-till drill again for wheat we will likely drill some of the beans if we end up with a late start and have the 12-23 tied up planting corn. We don't have any white mold problems in our area.
 
Around here almost everyone with the exception of a few guys plant beans on 15-30" rows. There are a hand full of guys that still use drills but other than them the only thing a drill is used for around here is wheat and pasture sowing. I think they do better on 15" to 19" inch rows myself.
 

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