Assuming that the farmers are upset over the use of things like eminent domain to take their land or to buy it at depressed prices, I would focus on the positive aspects of the railroad:
-decreased costs for shipping in freight or seed necessary for the farmer
-increased access to markets that would lead to higher profits using the railroad to transport freight
-ease of travel for the farmer and his family, increased local and regional mobility
-access to newer technological developments and tools produced farther away
-decreased prices on equipment thanks to greater access to mail order stores in larger cities, etc.
It would really depend to a certain extent on the nature of the farmer's complaint, whether this is a modern situation or one at the time of the beginning of the railroads, etc.