Did you see the one they did a couple of years ago about farming in the 1620s? It was 'Tales from the Green Valley' and was similarly fascinating. If you view both together you can see just how much difference the new Victorian machinery must have made to agriculture. I guess the next period of change was the postwar introduction of the concept of intensive farming, when fields were enlarged to allow the big machinery to operate more efficiently. You could set one in the late 1940s and 50s I guess.
Edited to add: I've just looked up 'Tales from the Green Valley', and it was done in 2003, which is about 3 years longer ago than I thought it was. Unbelievable!
