After the collector gathers an armful of leaves, he deposits them in the sled. The sled is drawn between the rows during priming and transports the leaves to a shady place where they are tied to sticks, preparatory to hanging in the curing barn. FLUE-CURED TOBACCOCorrelation between Chemical Composition and Stalk Position of Tobaccos Produced under Varying Weather Conditions1 Of^LUE-CURED tobaccos are assorted (12, 18, 18) or graded by the producer prior toJh marketing. This grading is done according to well-established practices based upon judgment of quality in which consideration is given to (a) the position at which the leaf was produced on the stalk, commonly called "stalk position," (b) the physical condition and texture of the leaf, and (c) the color of the leaf. This same method of grading is followed in industrial practice although the specific grade names may be replaced by a system of symbolic nomenclature such as is used in the federal system of tobacco grading (80). Thus a leaf grown on the lower half of the stalk or in the lug position, of best physical condition and of a bright yellow color, might be called XiL-13; X indicates the lug stalk position, the subscript indicates the physical condition, L indicates a lemon yellow color, and 13 shows that the tobacco is of the South Carolina type.The regularity of differences in characteristics of leaves grown in different stalk positions has encouraged attempts to differentiate grades of tobacco upon the basis of chemical composition. An outstanding example is the work of Piatnitzki (22) who worked with Russian tobaccos and elaborated on the former work of Vityn (31) and Krevs (16). Investigation of American tobacco has been largely confined to ascertaining the content of specific constituents in different grades or the influence of a few constituents upon specific behavior. Carpenter (4, 5) analyzed various grades in the outstanding tobacco types but made no attempt to differentiate between grades or to associate them with stalk position. Shedd (27) showed the variation in potassium, chlorine, and sulfate content of the various grades of Kentucky tobacco.

No abstract

^®F mC•• suited for consumption in manufactured tobacco products immediately after curing. Depending upon the type of tobacco, method of aging, and local terminology, such tobaccos are referred to as "raw," "green," "unfermented," or "unaged." These terms refer to the presence of irritating properties, the lack of aroma, and to differences

No abstract