Fii'lfJ E,i'perime)itt< in Maiiuriiig, 190S-4. 



693 



From these figni-es sulphate of ammonia has produced a little 

 more than 1-lOth of a ton of hay more than an equal quantity of 

 nitrate of soda. The superiority of the sulphate as a nitrogenous 

 fertilizer is confirmed by tests carried out on 23 out of the 50 fields 

 (Table C), where larger and smaller a])])lications than 1 cwt. have 

 been used with equal quantities of superjihosphate. These results are 

 given on Plots 16, 18 and 19 of Table C ; they are here repeated. 

 They represent the average of 23 fields. 



Yields Produced by 



The difference in favour of the sulphate of ammonia appears in 

 every test, and taking the average is W(mderfully regular. 



The Effect Pkoduced by Light, Medium and Heavy Dressings 

 OF Xitrogenous Fertilizers. 



The effect of medium and heavy dressings can also be calculated 

 from the figures given above. They are more striking and apparent, 

 perhaps, with the slightly altered arrangement of the figures as given 

 below : — 



Average of 23 Fields. 



The additional \ cwt. in each test has produced a further increase 

 of a little less than 1-lOth of a ton in the case of sulphate of ammonia, 

 and a little more than that quantity in the case of nitrate of soda. 

 In neither instance, however, are the additional yields sufficiently 

 heavy to make the lai^ger ap|)lication a profitable one. Lighter appli- 

 cations of a nitrogenous manure were not made with the 2 cwt. of 

 stqierphosphate, althongli it might noM' be regretted that this was ilot 



