1900.] 



PUBLIC DOCUMENT — Xo. 33. 



39 



The most marked effect is the injurious influence of the sul- 

 fate of ammonia. 



Onions. — The yields of the several plots are shown in 

 the table : — 



The averaijes on the several fertilizers were : — 



It becomes evident from these figures (1) that none of the 

 fertilizer combinations except one (nitrate of soda and sul- 

 fate of potash) benefited the crop, (2) that the sulfate is 

 much superior to the muriate as a source of potash, and (3) 

 that the nitrate of soda is much the best source of nitrogen. 



Table Beels. — With this crop the manure alone gave much 

 the best yields, and the several fertilizer combinations failed 

 to produce effects sufiiciently marked to warrant discussion. 

 The details, therefore, will not be given. 



CahbcKjes. — But one i)lot in this crop gave a yield excel- 

 ling the manure alone, and that was the one receiving, in 

 addition to manure, sulfate of ammonia and muriate of pot- 

 ash. The yields in hard heads in pounds were as follows : 



