1240 
MESSRS. J. B. LAWES, J. H. GILBERT, AND M. T. MASTERS, 
Table XL1Y.—Relative predominance of Poa trivialis. 
Poa trivialis 
Was First, Second, or Third, 
Yielded 5 per cent, and over, 
among the total Grasses, as under. 
to the total Mixed Herbage, as under. 
1862. 
1867. 
1872. 
1877. 
1862. 
1867. 
1872. 
1877. 
r i . 
1 
1 
31-90 
22-32 
2 . 
1 
2 
28-18 
15-75 
4-1. 
. . 
5-16 
5*65 
1 
4-2. 
3 
8-14 
8 . 
r f 
5-48 
, 
9 . 
. . 
8-72 
, m 
Plots - j 
10 . 
11-1 
3 
2 
10-18 
13*25 
* • 
11-2 
3 
17*04 
13 . 
3 
11-84 
6-68 
14 . 
1 
i 
2 
i 
22*48 
32-93 
2476 
21-59 
15 . 
, , 
l 
2 
6-53 
23-67 
7*95 
6-05 
16 . 
„ 4 
, , 
6-87 
8 96 
6-53 
. . 
a7 . 
*2 
5-21 
12-08 
1 
P First 
3 
3 
0 
i 
] 
Total < 
Second 
1 
2 
2 
0 
} 14 
8 
3 
2 
1 
[ Third 
4 
0 
0 
0 
J 
This Poa has only been first on four plots: on the two dung plots in 1862, and on 
one of them in 1867, after the discontinuance of the manure, but on neither since. 
It has three times been first on the plot with mixed mineral manure and the larger 
amount of nitrate, and once on the plot with the same amount of nitrate without 
minerals. It was second on one of the high ammonia and mineral plots in 1862, and 
in the same year it was third on four other ammonia plots. In 1867 it was second 
only on the dung plot and on one of the nitrate plots. Since that date it has been 
neither first, second, nor third on any of the ammonia plots. In 1872 it was second 
on two of the nitrate plots, but in the last year of separation it was first on only 
one—a nitrate plot, and not second nor third on any. 
The number of plots on which it contributed 5 per cent, and upwards of the 
produce was 14 in 1862, only eight in 1867, and was reduced to three in 1872, and to 
two in 1877. The plots on which it maintained this degree of prominence were all 
nitrate plots. In fact, although at first extremely prominent on many plots it 
strikingly declined wherever ammonia was applied, and almost as strikingly retained 
its position on the plot with the mineral manure and the larger amount of nitrate of 
soda (14); yielding on it 22*48 per cent, of the total produce in 1862, 32*93 in 1867, 
24*76 in 1872, and 21*59, in 1877; whilst in 1874 it was estimated to form about 
one-half of the total herbage of the plot. 
