In the middle of the fertile Willamette Valley in western Oregon, farmer Bob Wilt walks the rows of his 75-acre organic blueberry farm critically plucking ripe fruit for analysis. What he’s looking for is not sweetness or pest resistance (though these factors are certainly involved), but the fruit’s nutrient density. Thus far, his berries measure up. Test.

Among organic methods of pest control, rock dust is one of the safest for people, soil, and plants.

Organic Connections magazine has published a story on blueberry grower Bob Wilt who found that the more efficiently he was able to get minerals into his berries, the higher the brix measurement went. Hence, he concentrated on doing that and still does to this day. And as the brix has gone up, so has the flavor.