and Permanent Pasture. 
97 
Plots. 
Xiinie of Jluiuue. 
(Juantitj' 
of ^Itinuro por 
Plot of 1 of 
TO 
an Acre. 
Weight of 
Grass per Vint. 
■VVeiRbt of 
Grub* pur Acre. 
cwts. 
qrs. 
Ib.-i. 
Tons. 
cwts. lbs. 
1 
10 bush. 
9 
2 
5 
4 
15 50 
ll> 
( in 
2 
< and 
10 
3 
I 
5 
7 66 
56 lbs. 
) 
3 
Fine Bone-dust 
U ewt. 
13 
15 
6 
19 82 
(Mineral Siiperpliosphate 
56' lbs. 
4 
< and 
4 32 
( Crude German Potash-salts.. 
56 „ 
t 
5 
0 
24 
6 
12 16 
G 
5r, "„ 
11 
3 
13 
5 
18 74 
r>G „ 
18 
1 
3 
9 
2 86 
8 
Crude German Fotash-salts . . 
56 ,, 
12 
3 
6 
6 
8 4 
(Mineral Superphosphate 
56 „ 
9 
1 and 
}„ 
1 
1 
9 
12 66 
56 „ 
10 
12 
3 
13 
G 
8 74 
A glance at the preceding experiments sliows : — 
1. That the quick-lime on plots 1 and 2 burnt up to a con- 
.siderable extent the grass-land, and diminished the yield of grass 
in consequence. 
2. That bone-dust had little or no effect in the first year of its 
application. 
3. That the increase on plot 4, manured with superphosphate 
and crude potash-salts, was inconsiderable. In all probability 
superphosphate alone would have produced more grass than its 
mixture with crude potash-salts, which appeared to have had an 
injurious effect upon the crop. 
4. That the dressing with common salt diminished the weight 
of the grass-crop. 
5. That crude German potash-salts also rather diminished the 
produce. 
6. That Peruvian guano, and in a still higher degree the 
mixture of Peruvian guano with superphosphate, produced a 
large increase in the weight of the grass-crop. 
In conclusion it may be stated that the field on which the ex- 
periments were tried was laid down in grass about fifteen years 
ago. It was fairly productive land, and had been dressed at 
various times with shell-sand. The soil is a moderately-stiff" 
sandy loam, and contained an abundance of carbonate of lime in 
the shape of shell-sand. 
Laboratory, 11, Salisbury-square, Fleet-street, 
January, 1869. 
VOL. v.— S.S. 
II 
