Apparently, a potent weapon against the old bourgeois world is tractors. Here is Stalin, writing to the tractor works in Stalingrad, 1930:
Greetings and congratulations on their victory to the workers and executive personnel of the giant Red Banner Tractor Works, the first in the U.S.S.R. The 50,000 tractors which you are to produce for our country every year will be 50,000 projectiles shattering the old bourgeois world and clearing the way for the new, socialist order in the countryside (Works, vol. 12, p. 241).
No wonder ‘Tractor Drivers’ won the Stalin prize in 1939: