1907.] 



PUBLIC DOCUMENT — No. 33. 



29 



As a result of all the experiments previous to this year, 

 it has been found that the materials furnishing nitrogen 

 have produced crops in the following relative amounts : — 



Similar averages for this year are as follows 



If we combine the results showing relative standing in 

 1906 with the similar figures for all the years previous to 

 1906, the relative standing is as follows: — 



Per Cent. 



All the figures showing relative standing included in the 

 above tables are based u]5on the total yields. Presented in 

 this w^ay, they are not without interest. Of even greater 

 interest, however, will be a comparison on the basis of the 

 increases as compared with the no-nitrogen plots, due to the 



