No. 7. 



DEPARTMENT OF AGRICULTURE. 

 Percentage of Deficiency 1905-1910 



683 



te 



a 



p. 



OS 





61) 



o, 



CO 



a 



C3 



a 



CO 





a 





a 



be 



a 



p. 

 an 



Complete lertUizera 



Dissolved bone, — - 



Keck and potash. 



Dissolved rock 



Ground bone — 



All classes except miscella- 

 neous, 



28.9 

 37.5 



25.2 



4.3 



20.17 



26.5 



*Only two samples analyzed for which no guarantees are reported. 

 tOnly two samples analyzed for which guarantees are recorded. 

 J Only four samples analyzed. 



A comparison of the average composition of all samples of com- 

 plete fertilizers for which guaranties are recorded with the average 

 of the corresponding guaranties, for several seasons past, including 

 those of this season, follows: 



Average Composition and Guaranty Compared 



Spring, 1905 

 Phosphorlo add: 



Total. 



Available, , 



Potash, 



Nitrogen, - 



Fall. 1905 

 Phosphoric acid: 



Total, 



Available, _ 



Potash, - 



Nitrogen, 



Spring, 1906 

 Phosphoric acid: 



Total, 



Available. 



Potash. 



Nitrogen 



FaU, 1908 

 Phosphoric acid: 



Total, 



Available 



Potash, . 



Nitrogen, 



Spring. 1907 

 Phosphoric acid: 



Total, _ , 



Available, 



Potash ., 



Nitrogen, 



