Foiae verde, bleter grine,
Oy, in yedere medine,
Shpint der shpin zayn povetine
Fil mit gift in fil mit sine

Foiae verde, grine bleter,
Lebt zikh git, der g'vir, der feter,
In der uremer arbeter
Ligt in drerd a kilometer 

Track 4 on their album "Traktorist"... description from the liner notes:

"This medley brings together an energetic [bad word]  first recorded in 1920 by violinist Abe Schwartz and his 12-year-old daughter Sylvia, with a Yiddish vocal that originally appeared in "Naye Velt Zhurnal", a 1950 Romanian [bad word] magazine that Bob harvested at a junk sale in Warsaw.