198 AGRICULTURAL EXPERIMENT STATION. [Jan. 



Cost jier Ton. 

 Phosphatic slao;, ...... 



Mona guano (VV^est Indies),. 



Florida rock jihospliate, . . . . 



South Cai'olina jihosphate (floats) , 

 Dissolved bone-black, 



$15 00 

 15 00 



15 00 

 15 00 

 25 00 



Analyses of Phosphates xised. 



[I., phosphatic slag; II., Mona guano ; III., Florida phosphate ; IV., South Carolina 

 pho.sphate; V., dissolved bone-black.] 



In 1890 potatoes were raised on the plats ; in 1891 winter 

 wheat was the crop experimented with (for details see ninth 

 annual report). The following fertilizing mixtures have 

 been applied annually to all plats, with the exception of 

 Plat 3, which received in 1890 ground apatite and in 1891 

 no phosphate whatever : — 



