I plant my beans with a row planter - 15" centers. I plant roughly a bag/acre which is 140,000 seeds. I typically apply 50 lbs/acre of N,P & K at the time of planting. Spray gly (I use RR beans) as late as I can without damaging plants when I run the tractor thru the field/plot. Once the stalk is snapped the plant will die. Once the beans canopy most weed issues are addressed. I will plant roughly around memorial day weekend. Once beans yellow or even start to actually dry I will broadcast cereal grains and brassica mix into them (may even consider an annual clover) for some forage diversity. I plant ag beans and try to get something as shatter resistant as possible.
I can also tell you that fall planted soybeans are an awesome early season draw. Obviously once frost hits your screwed, but until then you may have the only young soybeans around and once the deer find them they will hammer them. I found that out as I disced under a strip to plant AWP one year - when the beans germinated the deer beat a path thru the plot after the young beans.