Report of the Chemist for Agriculture. 



821 



NITROGENOUS MANURES. 



POTASSIC MANURES. 



MIXED MANURES. 



GUANOS. 



The average composition of the superphosphates in the season's 

 manures, shows no material diiference from that of the samples col- 

 lected by field officers. The same applies to bonedust. The nitrate 

 of soda contained large impurities in the shape of nitrate of potash. 

 The two samples of Thomas phosphate sent in are inferior owing to 

 the large percentage of insoluble phosphoric acid. The potassic 

 manures are shown by analysis to be up to the usual standard. 



