TYPES AND VARIETIES 



459 



with long corolla tubes. The leaves are simple and alternate. They 

 are from a foot to two feet in length. The seeds are very small, a 

 single plant often producing as many as 1,000,000. The whole of 

 the green part of the plant is covered with long, soft hairs that exude 

 a viscid juice and give the surface a moist, glutinous feeling. 



Composition of the Tobacco Plant. The tobacco plant is very 

 rich in the plant food elements liable to be deficient in the soil. A 

 crop yielding 1000 pounds of leaf per acre removes from the soil in 

 stalk and leaf about sixty-seven pounds of nitrogen, eighty-five 

 pounds of potash and nine pounds of phosphoric acid. Tobacco 

 stalks are so rich in plant food that they make a valuable manure. 

 They contain three to four per cent of nitrogen, four to five per cent 

 of potash, and a fractional part of a per cent of phosphoric acid. 

 The stems of the leaf contain from two to three per cent of nitrogen, 

 six to ten per cent of potash and a fractional part of one per cent of 

 phosphoric acid. The following table is taken from Bulletin 180 

 of the Connecticut Experiment Station : 



Analysis of Fermented and Unfermented Tobacco Leaves 



Types and Varieties. There are three general classes of 

 tobacco. They are: (1) Cigar tobaccos, (2) export tobaccos, and 

 (3) manufacturing tobaccos. By manufacturing tobaccos are meant 



