If you know how many acres you have sown of each kind of corn, inquire how much the acre the soil of that land takes for sowing, and count the number of quarters of seed, and you shall know the return of seed, and what ought to be over. Robert Grosseteste
Know that each acre of fallow ought to support yearly two sheep at the least, then a hundred acres of fallow can support two hundred sheep, two hundred acres, four hundred sheep and so on. Robert Grosseteste
Meat is an inefficient way to eat. An acre of land can yield 20,000 pounds of potatoes, but that same acre would only graze enough cows to get 165 pounds of meat. Alexandra Paul
It looks as though yields of over 10 times what we can currently grow per acre are feasible if you control the CO2 concentration, the humidity, the temperature, all the various factors that plants depend on to grow rapidly. Ralph Merkle
