Mencius - Book 5, Part 2, Chapter 2F

'As to those who tilled the fields, each husbandman received a hundred mâu. When those mâu were manured, the best husbandmen of the highest class supported nine individuals, and those ranking next to them supported eight. The best husbandmen of the second class supported seven individuals, and those ranking next to them supported six; while husbandmen of the lowest class only supported five. The salaries of the common people who were employed about the government offices were regulated according to these differences.'
~ James Legge translation via nothingistic.org ~

Go here to read the introductory post to this serialized version of the Works of Mencius.