UK Versus US: Enclosed Farmland

An interesting piece in Buzzfeed (Hat tip: Marginal Revolution) on Britain's housing problems. But I want to steal one of its 15 graphics:

Note the "enclosed farmland" category, which basically covers most of England and Ulster, plus bits of lowlands Scotland. 

Trying to find the equivalent for the US.  There's this NASS map, which can get very detailed--I'd never seen it before. 

And there's this map of "prime farmland". 

What's important I think is that farmland in the US is much more splotchy; the UK is much more uniformly developed as either farm or urban.