Wikipedia tells us that the song “How Ya Gonna Keep ’em Down on the Farm (After They’ve Seen Paree?)” was popular after the end of World War I.
(p. C6) Dick Cavett, a son of Nebraska, used to ask (quoting Abe Burrows), “How you gonna keep ’em down on the farm, after they’ve seen the farm?”
For the full review, see:
A. O. SCOTT. “Off to the Stars, With Dread and Regret.” The New York Times (Weds., NOV. 5, 2014): C1 & C6.
(Note: the online version of the review has the date NOV. 4, 2014, and has the title “Off to the Stars, With Grief, Dread and Regret.”)