Experiments upon IVkeat, Barley, and Swedes. 319 
EooT Experiments. 
These experiments had but one object in view, namely, how 
far increasing the amount of superphosphate would correspond- 
ingly increase the crop. The results obtained by Mr. Plumbe, 
of Ashton Fields, as embodied in Table XII., show that when 
3, 5, and 7 cwts. of Lawes' superphosphate were respectively 
applied, no marked increase in crop was obtained by using the 
larger quantities of manure. This result was on the whole borne 
out by similar experiments carried out upon Earl Bathurst's 
home farm in 1868, although the results obtained during 
such a dry season upon swedes could not alone be considered 
satisfactory : as confirmatory evidence they have a certain value. 
In 1867 (Table XIV.) I tried the effect of heavy dressings upon 
swedes, and although I obtained a better result from 6 cwts. of 
superphosphate per acre than from 5 cwts., the crop produced by 
5 cwts. of superphosphate was no better than that grown by 
6 cwts. 
Table XIII. — Swede Expeeiments, 1869 — Mr. Plumbe's Eesults. 
PLOTS. 
Dressing 
per Plot. 
Amount 
of 
Dressing 
per Acre. 
Produce per Plot. 
Produce per Acre. 
Numijer of 
Swedes 
per Acre. 
lbs. 
lbs. 
Cwts. qrs. 
lbs. 
Ts. 
cwts. qis. 
lbs. 
Lawes' superphosphate 
39 
780 
8 2 
19 
8 
13 1 
26 
16,560 
26 
520 
9 0 
8 
9 
1 1 
20 
16,800 
17 
340 
8 3 
19 
S 
18" 1 
26 
17,340 
17 
340 
9 2 
4 
9 
10 0 
8 
17,240 
26 
.520 
12 2 
0 
12 
10 0 
0 
17,840 
A bone superphosphate 
39 
780 
10 1 
10 
10 
6 3 
2 
16,180 
26 
520 
10 0 
25 
10 
4 1 
24 
17,880 
26 
520 
11 0 
23 
11 
4 0 
12 
18,960 
Table XIV. — Eestjlt of Experiments upon Swedes, 1867 — Eotal 
Agricultural College Experimental Farm. 
PLOTS (t3 Acre). ] 
Dressing 
per Acre. 
Produce 
Plot. 
)er 
Produce per 
Acre. 
Number of 
Plots 
per Acre. 
Lawes' turnip manure . . 
lbs. 
Cwts. 
qrs. 
lbs. 
Tons cwts. 
lbs. 
540 
17 
0 
22 
12 
17 
106 
16,155 
540 
15 
1 
12 
11 
10 
40 
» » » , 
667 
17 
2 
4 
13 
13 
4 
15,740 
667 
20 
2 
17 
15 
11 
3 
15,900 
* f , , . . 
900 
17 
0 
2 
12 
15 
30 
16,305 
9 9 , , . . 
No Manure 
900 
20 
0 
11 
15 
1 
53 
12,585 
12 
3 
20 
9 
12 
66 
16,245 
12 
0 
19 
9 
1 
23 
14,310 
