No. 7. 



DEPARTMENT OF AGRICULTURE. 



675 



Average Composition and Guaranty Compared — Continued. 



nv, u . Fall, 1903. 



Phosphoric acid: 



Total , 



Available 



Potash 



Nitrogen !!]!!!!!!].!!.......! 



o^ ,, . . Spring. 1904. 



Phosphoric acid: 



Total 



Available ] 



Potash 



Nitrogen ,,,, 



Fall, 1904. 

 Phosphoric acid: 



Total 



Available, 



Potash 



Nitrogen 



Spring, 1905. 

 Phosphoric acid: 



Total 



Available 



Potash 



Nitrogen 



Fall, 1905. 

 Phosphoric acid: 



Total « 



Available 



Potash 



Nitrogen, 



Spring, 1906. 

 Phosphoric acid: 



Total 



Available 



Potash 



Nitrogen 



Fall, 1906. 

 Phosphoric acid: 



Total 



Available 



Potash 



Nitrogen 



Spring. 1907. 

 Phosphoric acid: 



Total 



Available 



Potash 



Sitrogen 



Fall, 1907. 

 Phosphoric acid: 



Total 



Available 



Potash 



Nitrogen 



Spring. 1908. 

 Phosphoric acid: 



Total. 



Available 



Potash 



Nitrogen, 



10.76 

 8.84 

 4.09 

 1.33 



10.24 



8.27 

 4.09 

 1.58 



9.65 

 8.13 

 3.90 

 1.29 



9.32 

 7.87 

 3.90 

 1.55 



It is of interest to note how closely the series of valuations, 

 based upon the wholesale prices of raw^ materials in the principal 

 markets during the most important huving season and upon certain 



