After giving two tubes of soil and water a gentle shake, Michigan State University professor and researcher George Bird compares how particles dissolve and how quickly the water begins to clear. This is a measure of water-stable aggregates, which he says is an especially good indicator of soil health. (Leslie Mertz/ for Good Fruit Grower) Putting definitive numbers on measures of soil health is a tricky business, because what’s good for one soil type may not be good for another. “I wish I could say we have set limits, but we can only give our best expert opinion at the […]