Site and soil relationships in natural stands of black walnut in the

factors including site and chemical and physical soil properties. These factors were related to tree height at the standard age of 50 years. Simple correlation and multiple regression analyses were run with site index using 31 variables of soil and topographic characteristics. These analyses explained 80% of the variation in height with chemical and physical variables. Soil type and depth to a restrictive layer (DRL) accounted for 55% of the variation in height.