Burley Varieties:
"Light air-cured" Type 31.
Grown and air-cured for cigarettes, pipe and chewing tobacco.
Plants are stalk-cut, left to wilt in the field, and barn dried in four to eight weeks using ventilation systems to control humidity.
Air-Curing is performed in widely ventilated barns under natural atmospheric conditions with little or no artificial heat; it takes about 3-12 weeks.  Light air-cured tobacco is very thin to medium in body, light tan shaded toward reddish brown in color and mild in flavor.
Burley tobacco is grown in rich limestone soils, primarily in Kentucky and Tennessee.  It is light brown to reddish in color and has a somewhat greater filling power than flue-cured tobacco.  Burley is light in body and neutral in flavor with a low sugar content and high alkaloid content.  Burley smoke is more basic (pH) than flue-cured tobacco.

Burley 21	Golden Burley	Green Brior	Harrow Velvet	Improved Brior
Kelly	R7-11	Warner	Yellow Twist Bud
N 126	KY 10	KY 14	KY 15	KY 17
TN 86	TN 90	VA 509	VA 510

Burley, Type 31. That type of air-cured tobacco, commonly known as Burley, produced principally in Kentucky, Tennessee, Virginia, North Carolina, Ohio, Indiana, West Virginia, and Missouri.