140 Report of Experiments on the Growth of Wheat. 
the same manure has been applied year after year on the same 
land. This is done in the following Table : — 
Table XXI.— Summary of the Results obtained in 1853 and 1863, 
respectively. 
Manuues. 
(Per Acre, per Annum.) 
Unmanured (Plot 3) 
14 tons Farmyard Manure (Plot 2) 
400 lbs. Ammonia-salts alone (Plot 10a) 
Mixed Mineral Manure alone (mean of Plots 5a ) 
and 56) J 
Mixed Mineral Manure, and 100 lbs. Ammonia- 1 
salts (mean of Plots 21 and 22) 3 
Mixed Mineral Manure, and 200 lbs. Ammonia- ) 
salts (mean of Plots (ia and 66) 5 
Mixed Mineral Manure, and 41)0 lbs. Ammonia- ) 
suits (mean of Plots la and 7b) 5 
Mixed Mineral Manure, and 600 lbs. Ammonia- ) 
salts (mean of Plots 8a and St) J 
Mixed Mineral Manure, and 800 lbs. Ammonia-} 
salts (mean of Plots ll'a and 166) . . . . 5 
Produce i-Eit Acre, &c. 
Dressed Corn. 
Quantity, 
. _t . 
Weigbt per 
Bushel. 
ocraw 
and Chaff. 
1853. 
1863. 
1853. 
1863. 
1853. 
1863. 
Bush. Pks. Bush. I'kb. 
lbs. 
lbs. 
lbs. 
lbs. 
5 3} 
17 1 
45-9 
62-7 
1413 
1600 
19 04 
44 0 
51-1 
C>3-1 
3372 
4279 
9 3i 
39 D£ 
48-6 
62-6 
2049 
3481 
10 Of 
19 2f 
4S-6 
63-0 
2040 
1728 
11 2J 
28 2f 
49-8 
62-4 
2021 
2588 
18 Of 
39 2i 
51-5 
62-3 
2788 
3715 
23 2f 
53 2f 
52-0 
62-5 
3738 
5866 
23 If 
55 2f 
51-8 
62-3 
3947 
6602 
23 0£ 
55 3J 
52-3 
62-4 ! 
4962 
6866 
It should be observed, that although both the quantity and the 
quality of corn were, under each of the conditions of manuring 
specified, lower in 1853 than in any other season of the last 
twelve, and hence the results of that year are selected to contrast 
with those of 1863, yet the amounts of straw were much lower 
in some other years. Indeed, the Table shows that in the case 
of the mixed mineral manure alone the quantity of straw was 
even higher in 1853 than in 1863. It was, however, in most 
cases where ammonia-salts were used, one-half, and sometimes in 
a greater degree, more in 1863 than in 1853. Again, although 
the quantity of corn obtained was greater in 1863 than in any 
other year of the twelve wherever ammonia-salts were used, yet, 
without manure, and with mixed mineral manure alone, it was 
higher in several other years. 
Notwithstanding these exceptions, which arc themselves very 
interesting and significant, the two seasons may still be taken as 
upon the whole representing, respectively the least and the most 
favourable of those to which the experiments refer ; and the dif- 
ference in the quantity and quality of the produce obtained by one 
and the same manure, in the one season compared with the other, 
is really most striking and instructive. Thus, in 1863 the pro- 
duce of dressed corn exceeded that of 1853 — without manure by 
11^ bushels, with farmyard manure by 25 bushels, with 400 lbs. 
