Near as I can tell, folks don't pack it in anymore unless they are physically unable...or the business doesn't justify it.

For example: sugar beets are a big crop in this area. Every fall for 3 weeks or so, anybody physically able(who wants to make some $$$) helps out. The harvest goes round the clock...24 hours till its done....12 hour shifts. I worked with two guys, one 78 and the other 80....both of whom took time out from their part time jobs to work the harvest. At 67, I'm one of the 'kids' of the group.