374 



EXPERIMENTAL STATIONS — EEPORT EOE 1880. 



The contrast between the plots which received dissolved 

 phosphates and the corresponding plots which received undis- 

 solved phosphates is very striking, and far exceeds that obtained 

 at the experimental stations of the Society. The average yield 

 per acre with the insoluble and soluble phosphates is as 

 follow: — 



showing an increase with soluble phosphates of nearly 50 per 

 cent. The plot with ground Canadian apatite was a failure 

 from the beginning to the end of the season, showing that this 

 hard crystalline phosphate is unsuited for use in the undissolved 

 state even when very finely ground. The inequality of the 

 crops produced with undissolved phosphates is also shown very 

 markedly in these experiments, and confirms what was pointed 

 out (page 352) in reference to the barley crop. 



