436 On the Continuous Growth of Wheat on the 
parison the produce over the same period, obtained by the 
mineral manure alone. 
Table XXVI. — Showing the Produce of Wheat Geain, in Bushels 
per AcEE, and Total Produce (Coen and Straw) grown by Mixed 
Mineeals alone, and with Salts of Ammonia, and Nitrate of 
Soda during 32 Years, in periods of 8 Years. 
Dressed Coen per Acre in Bushels. 
Mixed 
Minerals 
alone. 
With Salts of Ammonia. 
With Nitrate 
of Soda. 
43 lbs. 
Nitrogen. 
86 lbs. 
Nitrogen. 
129 lbs. 
Nitrogen. 
86 lbs. 
Nitrogen. 
8 years, 1S52-1859 
19 
35J 
361 
31J 
8 years, 1860-1867 
151 
261 
361 
391 
401 
8 years, 1868-1875 
14 
22 
31 
36 
39 
8 years, 1876-1883 
121 
20j' 
28 
32i 
34f 
32 years, 1852-1883 
24J 
323 
361 
361 
Total Produce per Acre in Corn and Straw. 
Mixed 
With Salts of Ammonia. 
With Nitrate 
of Soda. 
Minerals 
alone. 
43 lbs. 
Nitrogen. 
86 lbs. 
Nitrogen. 
129 lbs. 
Nitrogen. 
86 lbs. 
Nitrogen. 
8 years, 1852-1859 
3191 
4808 
6490 
7012 
5897 
8 years, 1860-1867 
2450 
4276 
6262 
7363 
7862 
8 years, 1868-1875 
2144 
3612 
5379 
6593 
7344 
8 years, 1876-1883 
1899 
3422 
5248 
6301 
6824 
32 years, 1852-1883 
2421 
4029 
5845 
6832 
G982 
Taking the three proportions of nitrogen, as applied in salts - 
of ammonia, it will be seen that in the separate periods of 
8 years each, and also in the whole period of 32 years, the in- 
crease of wheat obtained by the addition of 43 lbs. of nitrogen 
to the minerals, varies from 8 to 11 bushels per acre ; the total 
increase over the whole period being not quite 9 bushels per 
acre. The application of an additional 43 lbs. of nitrogen, or 
in other words, a total application of 8G lbs. of nitrogen, again 
