you can plant with a old two row planter,
i plant with a a old burch planter, i have two units one set up for beans, and the other set up for corn, and it requires a soy bean kit which consist of a center bearing, bean plates, 3 extra chain links and bigger drive sprockets, than the corn would require, bean plates look different than corn plates.
i have my bean planter running 12 cog to 12 cog this is puting out 100 lbs per acre on
18" row spacing, (9 cog to 12 cog cuts it back to 75 lb per acre). i have my planter set at 36" rows and then i split the middles to get a 18" row spacing
my corn i plant at a 29000 population by running the same 12 to 12 cogs with a 18 cell plate
bean plate in planter