Urban land is 69 M acres, cropland 391 (according to some quick googling) and pasture 654. So urban is 17% of cropland, or 7% of all farmland. I'm surprised it'

Urban land is 69 M acres, cropland 391 (according to some quick googling) and pasture 654. So urban is 17% of cropland, or 7% of all farmland. I'm surprised it's that high to be honest, compared to plane-window impressions. Surely a majority of urban area is post-1950, how much is former crop/ranch/forest I'd struggle to guess. Would be interesting to have better numbers, and over time.