117 



No. 18. — Decided stemming type. Resembles No. 17 in 

 color, but leaf much larger than 17. 



No. 19. — Quite small and indifferent, slight yellowish 

 tint. 



No. 20. — No manure. Very small and indifferent, and 

 shows plainly that tobacco can not be raised on soil like 

 this without fertilizers. 



By reference to the following table, and by comparing 

 these plots in groups of threes, it appears that the nitrogen 

 in the form of nitric acid, contained in nitrate of soda, in 

 plots 8, 9 and 10, of group 1, gave the best results. Dried 

 blood, in the form of organic nitrogen in plots 16. 17 and 18, 

 of group 2, gave the next best, and ammonia, in sulphate 

 ammonia in plots 12, lb and 14, group 3, gave the poorest 

 results. 



^ ( Plot No. 8. Nitrate Soda, yield per acre 964 lbs. 



a ^ " -9. " '• " " " 1020 '• 



g ^ " " 10. • " " " " " 972 " 



u 



^ 2956 



oi t Plot No. 16. Dried Blood, yield per acre 800 lbs. 



& ' " "17. " " ' 996 '• 



§ ^ " -18. " " " " " 1072 " 



^ 2868 



CO ( Plot No. 12. Sulphate Ammonia, yield per acre 508 lbs. 



o,; " "13. " " " •' " 1000 " 



3 ) 4i n Y± " " " " " 952 " 



u 



^ 2460 



CONTINUATION OF NITROGEN EXPERIMEMT. 



This test was made on plots contiguous to one another 

 and as nearly alike as possible in physical conditions and 

 fertility. 



Tlie soil upon which it was made was poor sandy upland. 

 Every application contained the same amounts of potash 

 and phosphoric acid, and practically the same amount of 

 nitrogen, but in different forms, thus giving at the same 

 time all the fertilizing constituents required and full effect 

 to the nitrogen employed. 



