Ah Bo counted on his fingers and calculated the survival threshold of the Herdsmen, which is also the per capita livestock scale that a tribe must maintain. On the vast grassland, herds of milk-producing sheep and cattle are almost the only means of production and the primary food source for the tribe. They are akin to moving "fields," but with the layer of sheep grazing and the conversion to milk, the output is inevitably one magnitude lesser than grain directly grown from fields!
"Exactly! That's right, twenty sheep's milk production can sustain one strong man! And to raise one sheep, you need more than 8 acres of meadow. But to ensure good milk production from sheep, having 10 acres of grassland is best!"
