Soybeans are as fragile or more so than peas. I use extra course for peas. I cant imagine the seed splits with course, much less the fine rolls. Course would be minimum for my usage. My soybeans are usually over 3,000 seeds per pound. Less than that, and the seed would be so big you would have soy flower.

IMO. Heavy on the O.

 

I cant imagine the seed splits with course, much less the fine rolls.
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The book doesnt recommend extra course. they say coarse or fine

 

Coarse roller,been using that for years.At the price of seed why would you want to put split and cracked beans in the ground?

 

Keeping in mind I am running a mechanical 2320, 3 runs on only a 15' drill that is on 15" spacing. So I only have 12 openers per'se.

So my drive ratio I derived from the book as width divided by run count times 10. That gives me a 50% drive ratio needed.

I'll have to go look in my notes at the shop for the "gate" setting I used. I call the slide scale the gate for whatever reason. I guess I just got used to it from the box drill years.

But yes, I like to divide peas and beans as few times as I can and try to give as much cushion as possible to the fragile seed.