1
It is the thorough cultivation that enriches the land, not the clover.
2
A proper three or fiveyear rotation of crops actually enriches the land.
3
Hence it is that irrigation greatly enriches the land and increases the yield.
4
This brings on a slime which enriches the land surprisingly.
5
Your _second principle _is, that "a proper three or five-year rotation of crops actually enriches the land."
6
Fortunately, Mr. Hill, you have not found it "exceedingly difficult to work out the principles which govern the proper rotation" that "actually enriches the land."