Someone who didn't grow up in this area of the country might not even take notice of these signs, or notice them without thinking about them, but growing up in a small town (population 1500; my high school graduating class was 42) where farming was all around, I think a little differently about these things. Well, now that I've grown up I do, anyway... I didn't really think much about it at all while I was in high school! :D
Farming is not an easy profession- it's one of the most dangerous professions there is, and to me, it seems a lot like gambling: farmers gamble on what the weather will be like for the planting and growing seasons, they gamble on the prices they hope they'll get for your crops (months in the future), they gamble on whether their expenses and equipment will hold up, and they hope there won't be any emergencies... it's not for the faint of heart, I don't think!
So, now that I've waxed all philisophical on you, I'll say thank you for indulging me, and I'll close with a quote from Willa Cather (one of my favorite authors for her lyrical descriptions of the land and countryside). She lived in the early 20th century and wrote a number of novels about pioneer life in Nebraska... this quote is from one of her best-known novels O, Pioneers!
We come and go, but the land is always here. And the people who love it and understand are the people who own it - for a little while.