"94 EXPEKIMENTS WITH SOLUBLE AND INSOLUBLE PHOSPHATES 



Section III. 



The source of the ammonia applied to plots 1 and 2 was sul- 

 phate of ammonia; plots 3 and 4 was nitrate of soda; plot 5, 

 fish guano ; and plot 6, azote guano ; the farmyard manure and 

 coprolite, as already mentioned, being the same on all the 

 plots. 



Section IV. was set aside for testing the same manures wMch 

 were used in Section I., but along with them it received at the 

 rate of 20 tons of farmyard manure per acre, but instead of 

 having two coprolite plots there was only one, the other one 

 getting fish guano alone. One of the plots received the dressing 

 of farmyard manure alone, so as to have a fair comparison of the 

 values of the various kinds of phosphates and nitrogenous com- 

 poimds, as fertiHsers for the turnip crop, in addition to ordinary 

 farmyard manure. The suljjoined table shows the weight per 

 acre of the various manurial ingredients, and cost of same, 

 excepting the farmyard manure, about the value of which there 

 might be diversity of opinion — 



Section IV. 



