on Permanent Meadow Land. 
413 
tion of the total mixed produce, or hay, varied very mucli accord- 
ing to season — both in regard to the percentage of Dry substance, 
and to that of the Mineral matter in that Dry substance. It will 
also presently be seen that the percentages of total Nitrogenous 
compounds likewise varied very much according to season. The 
composition of the ash does not, however, appear to be so much 
affected by variation in season as from the influence of the latter 
on the composition of the hay in other points of view might 
have been anticipated. 
The much less effect of variation in season, than in manuring, 
on the composition of the ash of the experimentally-grown hay, 
is illustrated by the results given in Table XIV., which now 
follows : — 
Table XIV. — Showing the Compositiox of the Ashes of Meadow-Hat 
grown Experimentally in different Seasons. 
Mixed Ashes of the Produca hy 16 different Manures 
in each Year. 
1856. 
1857. 
1858. 
Calculated 
Mean 
(1856-7-8). 
0-14 
13-02 
3-59 
26-83 
6-40 
0-33 
12-13 
3-93 
26-43 
7-45 
0-25 
11-92 
3-97 
25-26 
9-58 
0-24 
12-36 
3-83 
26-17 
7-81 
5- 59 
6- 02 
11-37 
3-37 
22-28 
5-68 
7-14 
12-15 
2-74 
19-93 
5-52 
7-18 
12-25 
2-73 
20-23 
5- 60 
6- 78 
11-92 
2-95 
20-81 
Saud 
2-15 
2*22 
2-89 
2-22 
2-29 
2-17 
2-44 
2-20 
Deduct 0 - CI * 
102-98 
2-56 
103-02 
2 -.74 
103-35 
2-76 
103-11 
2-69 
Totals .. .. 
100-42 
100-28 
100-59 
100-42 
* See note at foot of Table XIII. 
In the first column of the Table is given the composition of 
an equal mixture of the ashes of the produce from all the experi- 
mental plots in 1856 ; in the second column, the composition of 
a similarly mixed ash from the produce of all the plots in 1857 ; 
and in the third column, the composition of the mixed ash from 
all the plots in 1858. The fourth column gives the calculated 
mean of the three analyses. 
The uniformity in the composition of the three mixed ashes, 
