41 



of carbohydrates, especially starch and glucose. The soil of this 

 region contains a very small percentage of available mineral matter 

 and seems to be especially adapted to the production of yellow tobacco. 

 Below are given some of the results of soil analyses made by differ- 

 ent stations in connection with their investigations on tobacco: 



Results of tobacco soil analyses. 



Soils from— 



North 



Colorado, a Virginia. ; < Carolina, c Florida - d 



Cuba, t 



Moisture 



Organic matter.. 

 Insoluble matter 

 Phosphoric acid . 



Potash 



gen 



Lime 



Magnesia 



Iron oxid 



Alumina 



Soda 



• 



1.000 

 .950 

 97.000 

 .053 

 .018 

 .028 

 .130 

 .008 

 .790 



• 



14. 200 



12. 300 



32. 300 



1.600 



.160 



.320 



7.600 



.170 



29.400 



.030 



.084 



Station Bui. No. 10. 

 b Virginia Station Bui. No. 12. 

 e North Carolina Station Bui. No. 90a. 



fi Florida Station Bui. No. 19. 

 t Florida Station Bui. No. 19. 

 / Reported as volatile matter. 



The Division of Soils has made quite an extensive study of the prin- 

 cipal tobacco soils of the United States and has issued several bulletins 

 thereon. 1 It will be unnecessary to summarize the results here as the 

 publications can readily be obtained. 



CONCLUSIONS. 



Having thus reviewed the work of the experiment stations, it will 

 be well to outline clearly the general purpose of tobacco investigations 

 in order to understand fully the most important lines to be developed. 



One of the questions most frequently asked is the possibility of 

 extending the culture of tobacco to new areas. While tobacco is con- 

 fined as at present to comparatively small areas, and while it continues 

 to be one of the "money crops" of the farm, there will naturally be a 

 widespread desire to extend the cultivation to new localities. This is 

 one of the most difficult things to advise about, as so little is known 

 about the influence of climate and other conditions upon the quality of 

 the leaf. 



The tobacco industry is so highly specialized that a nondescript 

 tobacco is no longer needed and brings only a very low price. The 

 qualities of the tobacco leaf, including the size, shape, and thickness 

 of the leaf, the flavor and aroma, the grain and general style, are so 

 delicate, so easily influenced, and as yet so difficult to control that it 

 is impossible to say beforehand what qualities a leaf would have raised 



x Bul. No. 5, Texture of Some Important Soil Formations. Bui. No. 11, Tobacco 



Soils of the United States. Farmers' Bui. No. 83, Tobacco Soils. 



