I believe he was a runaway slave.
From what i can actually read it look to be correct.
Production of more food--the system allowed for more food to be produced which fed the workers in an industrial economy.
The 'four-field system' rotates crops between the 4 fields no longer needing to keep one empty because one of the crops would replenish the field with nutrients while the others take nutrients away from the fields. <span />
Answer:
Great Britain, France, the Soviet Union, and the United States
