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SPECIAL NITROGEN EXPERIMENT. 



As the cultivation of tobacco in the State of Alabama is 

 a new industry, it is important to find out the best method 

 of fertilizing on this soil. 



The experiment which follows was undertaken with this 

 in view — to ascertain how the tobacco plant responds to the 

 use of nitrogen in different forms and qualities when added 

 to a basal mixture of phosphoric acid and potash. By a 

 basal mixture, is meant a specific amount of fertilizer, in this 

 case, phosphoric acid and potash being used as a basis for 

 comparison in studying the effect of some fertilizing con- 

 stituent, nitrogen being used in different forms and amounts, 

 in the experiment to show the increased yield in the pro- 

 duce due to its action. 



Phosphoric acid and potash are supplied in the propor- 

 tions that are thought sufficient for a good yield, and nitro- 

 gen is supplied in one-third, two-thirds and full quantities. 

 Nitrogen is used as nitric acid in nitrate of soda, as am- 

 monia in sulphate of ammonia and as organic nitrogen in 

 dried blood. 



Twenty plots are provided for in the field plain — eighteen 

 of which received the experimental manures while two plots 

 received none. 



Figure 1 shows the appearance of some of the plug 

 varieties while growing. 



NOTES ON FERTILIZER TEST, AUGUST 20. 



No. 1. — No manure. Tobacco only medium in size. Ri- 

 pened unevenly and seems to belong to the cigar variety. 



No. 2. — About one-third larger than No. 1. and at this date 

 (Aug. 20) about one half of the plot is ready for cutting. 

 Seems to be the same variety as No. 1, and from general 

 appearance would call it Havana. Inclined to ripen with a 

 yellow color. 



No. 3. — Evidently a cigar variety. The entire plot has 

 ripened quite yellow and it is very evident that this fertili- 

 zer will cause tobacco to ripen yellow. 



