detritus?

went to the supermarket today and while i was there i stopped off at the field next door to see what was up...and at first glance it seed to be not much...lots of native plants out there...the odd maple tree...some thistles...cornstalks and cobs left over from last autumn's harvest...but if you look closely at the last photo...between the remnants of corn stalks and the native plants you can see a straight row of young plants that look remarkably like beans...no til beans are easier to do than corn and that system is in wide use here in this county...i will be looking in here to get a sure verification on this...however it is bean time and it looks as though the season is on.