Black walnut (Juglans nigra L.) is one of the best known and most valuable trees in Kentucky. However, due to its high value, the species has been aggressively harvested from natural stands, creating a limited supply of quality black walnut trees. Many landowners recognize this as an investment opportunity and have placed small tracts of unused land into black walnut production.
Ditsch, David C.; Stringer, Jeff; and McIntosh, D., "Differential Black Walnut Growth on a Recommended Soil Map Unit: Investigation of Related Soil Chemical and Physical Properties" (1996). Agronomy Notes. 22.