324 
Field Experiments on Swedish Turnips. 
Table I. — Weight of Topped and Tailed Swedes and of Leaves 
grown on each Experimental Quarter-Acre Plot in Lansome 
Field, 1881. 
Plot 1 A 
„ 1 B 
Plot 2 A 
„ 2b 
Plot 3 A 
„ 3b 
Plot 4 a 
„ 4 b 
Plot 5 A 
„ 5 B 
Plot G A 
„ 6b 
Plot 7 A 
„ 7b 
Plot 8 A 
8 b 
|No manure 
I Ground coprolites 
jDissolved coprolites 
>Bone-meal .. 
Roots. 
Leaves. 
tons. 
CVVt3 
qrs 
. lbs. 
cwts. 
qrs. 
lbs. 
4 
12 
2 
25 
11 
o 
O 
5 
3 
1 
8 
11 
3 
5 
C 
10 
0 
19 
11 
1 
1 o 
lo 
6 
8 
0 
2 
u 
3 
21 
6 
12 
1 
1 
1 1 
1 
0 
7 
1 
2 
11 
11 
2 
6 
6 
8 
1 
18 
£* 
O 
1 / 
/» 
o 
Its 
I 
10 
Q 
Q 
A 
U 
5 
12 
3 
5 
11 
0 
16 
5 
5 
3 
4 
6 
2 
3 
8 
10 
3 
1 
G 
8 
0 
26 
9 
2 
11 
G 
13 
0 
7 
12 
2 
10 
6 
14 
0 
10 
11 
0 
16 
G 
9 
2 
23 
13 
1 
17 
7 
0 
2 
15 
13 
3 
8 
The next Table shows the weight of topped and tailed swedes, 
and the weight of leaves of each plot calculated per acre, the 
average produce of the duplicate plots per acre, the increase of 
each plot per acre over the average produce of the unmanured 
plots, the quantities and kinds of manure used, and the cost of 
the manure per acre. 
On plot 5 B (manured with precipitated phosphate of limej, 
as stated already, a good many of the swedes were diseased, 
which partly explains the comparatively small crop on this plot. 
Aloreover, this plot was on naturally weak ground, for it was 
the spot where in the preceding year the wheat stood very thin. 
The differences in the weight of the swedes in the duplicate 
experiments in some instances amount to over 3t^ tons per acre, 
and in others to from 1 to 2 tons, roughly speaking. They are 
due, no doubt, to the unequal character of the soil in the experi- 
mental field, and not to any gaps in the rows ; for the swedes on 
all plots were remarkably even, with hardly any blanks. 
A careful inspection of the preceding tabulated results, 
amongst other particulars, shows : — 
1. That the average produce of the two unmanured plots 1 A 
and 1 B amounted to 19 tons 12 cwts. and 10 lbs. of clean 
