222 ACxRlCULTURAL EXPERIMENT STATION. [Jan. 



Cost 2^er Ton. 



Phosphatic slag, $15 00 



Mona guano (West Indies), 15 00 



Florida rock phosjjhate, 15 00 



South Carolina phosphate (lloal s) , 15 00 



Dissolved bone-black, 25 00 



Analyses of Phosphates used. 



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

 I)hosphate ; V., dissolved bone-black.] 



The following fertilizer mixtures have been applied annually 

 to all the plats, with the exee|)tion of Plat 8, which received 

 in 1890 ground apatite and in 1<S!)1 no phosphate whatever : — 



