UTILIZATION OF BLACK WALNUT. 7 
SUPPLY. 
RANGE. 
The black- walnut tree grows naturally over a large area extending 
from southwestern New England to central Nebraska, Kansas, Okla- 
homa, and Texas. The limits of its distribution are shown in figure 
1. Within the limits of its range, however, there are regions un- 
favorable to its growth where it is almost unknown. Black walnut 
grows best on soil that is rich, moist, and deep, but not wet. It is, 
Fig. 1. — Botanical range Of black walnut (Juglans nigra). 
therefore, not generally found on the higher elevations throughout 
its range, nor on wet bottom lands, but in moist coves, on fertile hill- 
sides, and on the well-drained soil of valleys and bottom lands. A 
limestone soil or sandy loam containing a large quantity of humus, 
overlying a deep subsoil of gravel, with a sufficient water supply, 
furnishes ideal conditions for growth. West of the Mississippi the 
walnut is confined generally to river valleys and moist situations. 
