a group or meeting of very old people. standing togeather their pigmentless white hair conveys the scene of a cotton field to an onlooker. (see cotton ball)
Dude1: why did i let you drag me to an eagles concert? this place is a cotton field i can't find a single person under 50!
Dude2: its not my fault i got free tickets from a radio contest.
When there is no portajohn on a construction site and a large number of people go in the woods and defecate. The used toilet paper left on the ground is referred to as an "Alabama Cottonfield".
The mexicans left an alabama cottonfield on that bricklaying job. I guess we should rent a Mexican Space Shuttle so they don't crap everywhere. Who is gonna pick up all this toilet paper?