Upvote:3
There are many reasons why a farmer could opt for grazing instead of growing crops post-war.
Right after the war, a lot of trade was done on the individual level, as much of the infrastructure (both technical and commercial) was destroyed. People from the cities travelled large distances to "acquire" foodstuffs directly. A piece of ham, or better even, sausages, was easier to transport than a sack of potatoes. Easier to smuggle through a checkpoint, too...
I'd love to give sources on this, but this is as anecdotal as it gets, coming from my grandparents. ;-)