The last harvest is 88 years away and Wayne Ebelhar knows he’ll never bring in the final crop. He is 12 years into a 100-year look at crop rotation with measurable results pointing to the bottom line.

The recent drop in the market averages prompted me to take a look at a few sectors that make up the indexes. I wanted to see if there was any cyclical rotation going on, that may give a clue as to the ...