138 Report of Experiments on the Growth of Wheat. 
The following Table shows the character of the results oh 
tained in this extraordinary season, in the experimental field : — i 
Table XX. — Summary of the Results of the Twentieth Season, 18G2-G3. 
Manures. 
(Quantities per Acre.) 
Produce pep. Acre, &c. 
Dressed Corn. 
Total 
Corn. 
Straw 
and 
Chaff. 
Quantity. 
Weight 
per 
Bushel. 
400 lbs. Ammonia-salts alone (Plot 10a) .. 
ATi v c*(\ 1VT 5 novo 1 AT'i v> n ro q ( m pan r»r P Ir^tc 1 
Mixed Mineral Manure, and 100 lbs. Ammonia- 1 
salts (mean of Plots 21 and 22) / 
Mixed Mineral Manure, and 200 lbs. Ammonia- 1 
Mixed Mineral Manure, and 400 lbs. Ammonia-1 
Mixed Mineral Manure, and GOO lbs. Ammonia-1 
Mixed Mineral Manure, and 800 lbs. Ammonia- 1 
Bush. Pks. 
.17* 1 
44 0 
39 0$ 
19 2J 
28 2? 
39 2} 
53 2f 
55 g| 
j 55 3^ 
lbs. 
62- 7 
63- 1 
G2-6 
63-0 
G2-4 
G2-3 
62*5 
62-3 
G2'4 
lbs. 
1127 
2886 
2587 
1290 
1852 
2528 
3492 
3G14 
3G59 
lbs. 
1G00 
4279 
3481 
1728 
2588 
3715 
5866 
G602 
C86G 
The experimental wheat-crop of 1863, the 20th in succession 
on the same land, proved to be in quantity of both grain and 
straw by far the most productive hitherto, and also in quality of 
grain nearly the best yet obtained. In quantity of straw, or total 
produce, the crop of 1854 the most nearly approached it ; but 
1854 and 1857, both of which were years of extraordinary yield, 
both fell considerably short of 1863 in quantity of grain per 
acre, and also in quality, as indicated by the weight per 
bushel. 
The season of 1863 was particularly marked by extraordinary 
productiveness, in both corn and straw, under the influence of a 
liberal supply of ammonia-salts. Where the quantity applied was 
not so excessive that the crops were over luxuriant, and much laid 
by the storms of wind and rain in June, more produce, and 
especially more corn, was obtained for a given amount of am- 
monia applied than in any former year of the experiments. Even 
where the amounts of ammonia-salts were the most excessive, the 
quantity of both corn and straw per acre was larger than in any 
preceding season. But, doubtless owing to the heaviest crops 
having been laid so flat, the amount of increase yielded for each 
increment of ammonia-salts supplied beyond 400 lbs. per acre 
