
, 198 Report oF THE DrrECTOR OF THE 
If now the farmer should desire he can easily obtain the 
materials in the market which by mixing together will give him 
a fertilizer in which he may know exactly not only what per cent 
of each fertilizing constituent is present, but in what forms of 
combination each constituent exists. 
For example let us suppose the farmer desires a fertilizer which 
shall exactly correspond in composition with the average of the 
330 analyzed, 2. ¢., containing 1.991 per cent nitrogen, 9.31 per 
cent available phosphoric acid and 3.353 per cent of potash; and 
let us assume that he desires a third of the nitrogen to be in the 
form of nitrate of soda, a third of sulphate of ammonia and a 
third as dried blood, also that the potash shall be in the form of 
muriate. 
An average composition of the above as found in the market is 
as follows: 
Per cent. 
Nitrate of/soda ‘contains, of nitrogen’, s. 74./5, 2 ees ee 16.47 
Sulphate of ammonia contains, of nitrogen ................. 20.50 
Dried blood icontains, \of nitrogen s..(G1) 34% 1. sins eure ee 10.52 
Dissolved bone black contains, of available phosphoric acid.... 16.70 
amie contains, Of potash ix .i gies, <jslalene bod ae sebete ate gene 13.54 


As we have seen, his fertilizer is to contain in each ton 39.82 
pounds of nitrogen, 186.2 pounds of available phosphoric acid and 
67.06 pounds of potash, and as one third of the nitrogen is to be 
in each of the above mentioned forms it is only necessary to 
divide the required pounds of each constituent by the percentage 
of this constituent present in the material to furnish it, and we 
would have the following result : 
Pounds. Per cent. Pounds, 
1115. | Dissolved bone black at ..| 16.7 | Phos. acid..| 186.2 
127.8 | Muriate of potash at..... 52.46 | Potash..... , 8752 
126.2.) Dried blogd at)... oc tan. 10.52 | Nitrogen...| 138.28 
64.8 | Sulphate of ammonia at ..| 20.50 | Nitrogen...| 13.28 
80.6 | Nitrate of soda at ....... 16.47 | Nitrogen...} 13.28 

1514.4 


