I am looking for a poster/print of two little boys, dressed in
overhalls, walking down a dirt road, with their hands in their back
pockets.  They are seen from the rear.  The caption reads, "So, how
long have you been farming?" Can you help me find it?  Thanks so much.

I believe I've found your print:

"The famous 'little farmers' bring rural nostalgia to your home. It is
beautifully mounted and ready to grace your wall. A perfect gift for
anyone on your list!

'Have you been farming long?' measures 14"x18", depicting two
irresistable youngsters in their osh kosh outfits. A touch of country
charm for everyone to treasure and admire. It is professionally
mounted so it will never fade, wrinkle, or wave as prints in poster
frames do.

Own a piece of 'Americana'!

This wonderful art has been heat laminated with a special non-glare
matte finish for beauty and permanant UV protection. Its oxygen free
barrier prevents yellowing or aging of your print. Mounted on a wooden
plaque for years of enjoyment. A heritage black beveled edge
accentuates the print beautifully...

Price - $16.50"

Wild Things Gallery
http://www.wildthingsgallery.net/oshkosh.html

The same image is offered by several sellers on eBay:

eBay
http://search-desc.ebay.com/search/search.dll?query=%22been+farming+long%22&ht=1&sosortproperty=1&from=R10&sotextsearched=2&BasicSearch=

Here's an interesting page about the history of the picture and the
two little boys:

My Famous Little Farmers
http://www.geocities.com/Heartland/Valley/2252/lttlfrmr.html

Google search strategy:

Google Web Search: "been farming long" poster OR print
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=%22been+farming+long%22+poster+OR+print

If this is not the image that you're looking for, please request
clarification before rating my answer; I'll be glad to resume the
search.

Best wishes,
pinkfreud

You are fantastic!  Even though I gave an incorrect description, you
found the exact print I was looking for!  Thank you so much!

Thank you very much for the five-star rating and the nice tip!

~pinkfreud