1921 ; ] Synthetic Nitrogenous Fertilisers. 



1045 





Mangolds! 



Barley. 



Wheat. 





Reading. 



Rothamsted, 19n9. 



Bothamsted 



, 1910. 





Strong Loam. 



Grain. J Straw. 



(i rain. 





Straw. 



Sulphate of ammonia 

 Nitrolim 



No nitrogenous fertiliser . . 



tans. cut. 

 S3 1 

 33 3 

 28 3 - 



bush. lb. 



19.1 | 3517 



45.2 3976 

 28.7 2619 



bush. 

 24.6 

 22.4 

 15.4 



\lb. 



2964 

 2343 

 1526 



The results are better than those reported from Germany 

 and Austria; putting the nitrogen in nitrate of soda at 100 the 

 values for sulphate of ammonia and nitrolim are: — 





Rye. 



Wheat. 



Barley. 



Oats. 1 Potatoes. 



Sugar 

 beet. 



Mangolds. 



Average 

 of all.. 



Sulphate of ammonia 

 Nitrolim 



93 

 74 



54 

 87 



89 

 75 



| 



97 94 

 79 78 



1 



95 

 66 



68 

 72 



84 

 76 



There are, however, some abnormal results here; allowing 



for these the German authorities, in framing their " monopoly 



law " of 1915, fixed the following value: — 



Nitrogen in nitrate ... ... 100 



ammonia ... ... 91 



„ nitrolim ... ... 83 



In this country we should give higher values to ammonia and 

 nitrolim, setting them at 96 and 90 respectively. 



The composition of nitrolim has varied slightly since it was 

 first introduced. In the raw state it contains 19.5 per cent, to 

 20.5 per cent, of nitrogen, which makes it suitable for chemical 

 works, but not for farmers. It contains carbide that needs to 

 be decomposed by water, and dust that has to be fixed by oil. 

 These processes bring down the nitrogen first to 18.5 per cent, 

 and then to 15 or 16 per cent. ; just before the War a modifica- 

 tion in the granulating process brought it down to 14.5 or 15 

 per cent. 



