Field and Garden: Leave the soil in better condition than what it started

"From now until 2060, we're going to have to produce as much food as we've produced in the last 500 years," says Jerry Hatfield in the 2018 documentary "Living Soil."

Hatfield is the retired director of the USDA's National Laboratory for Agriculture and the Environment. He was also my major professor at Iowa State University.

Hatfield continues, "If we want to make sure we can feed the world's pop...