Factual error: Not only is the tractor the wrong vintage, it is pulling a round baler that wasn't invented until the 1970's.
Factual error: In one scene they are playing "Almost Like Song." Although it had someone singing it to give it an old timey sound, the song wasn't released until 1977, 12 years after this is set.
Factual error: When Francesca is riding with Robert to the bridge a modern day John Deere combine passes them in the opposite lane.