The Little Lady of The Big House by Jack London Chapter 6 Page 12

You were a bonanza farmer. What did you do? You took forty thousand acres of the finest Sacramento Valley soil and you grew wheat on it year after year. You never dreamed of rotation. You burned your straw. You exhausted your humus. You plowed four inches and put a plow-sole like a cement sidewalk just four inches under the surface. You exhausted that film of four inches and now you can’t get your seed back.

“You’ve destroyed. That’s what my father did. They all did it. Well, I’m going to take my father’s money and construct. I’m going to take worked-out wheat-land that I can buy as at a fire-sale, rip out the plow-sole, and make it produce more in the end than it did when you fellows first farmed it.”

It was at the end of his Junior year