Buildings in the state farm "Revolution". A Kirovets tractor is driving across the field, plowing, harrowing the land. Yaroslavl association "Autodiesel". Production processes in the workshops of the association. Diesel testing. The results of the tests are summed up by the deputy chief designer P. Slabov. Assembly shop for forage harvesters "Yaroslavets". Harvester "Yaroslavets" passes through the swamp, mows the grass. Repair plant at the Yaroslavl association "Autodiesel". Crankshaft repair shop. Grinding and polishing operations. Says (synchronously) the chief welder of the association "Autodiesel" K. Rusov. The conveyor of the Kirovsky Zavod association. A worker installs a diesel engine on the Kirovets tractor. Says (synchronously) deputy chief designer of the association A. Savin.