108 Report of Experiments on the Growth of Wheat. 
Table III. — Summary of the Iicsults of the Third Season, 1845-6. 
Manures. 
(Quantities per Acre.) 
Produce rtu Acre, &c. 
Dressed 
Quantity. 
Com. 
Weight 
per 
Bushel. 
Total 
Corn. 
Straw 
and 
Chaff. 
Mixed Mineral Manures; mean of 4 experi-1 
inents (Plots 1, 5a 1 , 6a, and 186) J 
2 cwts. Sulphate of Ammonia alone (Plot 10a) 
2 cwts. Ammonia-salts (equal parts Sulphate] 
and Muriate), and Mixed Mineral Manure ; 1 
mean of 9 experiments (Plots 5a 2 , 66, 86, 116, | 
4 cwts. Eape-cake, and Mixed Mineral Manure;] 
mean of 8 experiments (Plots 8b 1 , 7a, 8a, I la,} 
2 cwts. Ammonia-salts (equal parts Sulphate] 
and Muriate), 4 cwts. Rape-cake, and Mixed 1 
Mineral Manure; mean of 4 experiments! 
Bush. Pks. 
1 17 3? 
: 27 Oj 
20 3 
27 U 
; 29 Oi 
23 21 
1 * 
31 2 
lbs. 
G3-8 
63-0 
63-0 
63-6 
63*2 
63-2 
63-1 
lbs. 
1207 
1826 
1422 
1850 
1965 
1603 
2125 
lbs. 
1513 
2454 
1766 
2244 
2626 
2047 
3006 
in the year before that), 9-J- bushels ; 2 cwts. of ammonia-salts and 
mineral manure, rather over 11 bushels ; 4 cwts. rape-cake and 
mixed mineral manure, 5f bushels ; and 2 cwts. ammonia-salts, 
4 cwts. rape-cake, and mixed mineral manure, 13J bushels. 
Thus, under the influence of this hot and dry summer, the 
ammonia-salts alone gave rather more corn, and not much less 
straw, and the ammonia-salts and mineral manure together more 
of both corn and straw, than the farmyard manure ; whilst mi- 
neral manures alone gave very much less produce than ammonia- 
salts alone. Here again, then, in a very different season, and in 
the third of the growth of wheat on the same land, the inefficiency 
of mineral manures alone, and the marked effect of nitrogenous 
manures, are very*striking. 
Fourth Season, 1846-7. 
Until the end of November, 1846, the season was mild and 
favourable. December, January, February, and considerable 
part of March, were extremely cold, with intense frosts, and much 
log, and, towards the end of February, deep snow ; January was, 
however, less rigorous than the other months. The remainder of 
March, the whole of April, and the early part of May were still 
unusually cold, with but little rain until towards the end of April, 
after which there was a good deal. The latter part of May and 
the beginning of June were fine, with a good deal of high tem- 
perature ; but during the latter part of June more than the usual 
amount of rain fell, and the temperature was also below the 
