388 Field Experiments conducted in 1889 and 1890. 
Plot 
Manures per acre 
Head-corn 
Straw 
1 
2 
6 
8 
g 
10 
14 
12 „ superphosphate J 
fl^ cwt. sulphate of ammonia . . . .| 
( 1 „ muriate of potash j 
.[if .... I 
1 Roots folded with sheep and a dressing i 
bushels 
32-61 
43- 51 
42-81 
47-03 
44- 60 
30-46 
4632 
cwt. qr. lb. 
20 3 26 
29 2 16 
27 3 12 
29 3 8 
29 2 6 
21 2 20 
28 3 20 
of about 1 45. Nitrate of soda gave a better return than sulphate of 
ammonia, and the addition of salt to nitrate of soda proved of no 
benefit. No better result was gained by folding sheep on the roots 
than -with \\ cwt. per acre of nitrate of soda. 
Experiments ujjon Mangel after Wheat. The Wheat had received 
ten Loads per Acre of Dung (^Bolwick Farm). The results in 
1889 were .— 
Manures applied per acre 
Plot 
Super- 
phos- 
phate 
Common 
salt 
Nitrate 
of 
soda 
Nitrate of 
soda (top- 
dressing) 
Muriate 
of 
potash 
Dung 
Boots per acre 
Tops per acre 
cwt. 
cwt. 
cwt. 
cwt. 
cw-t. 
cwt. 
Itons cwt. qr. lb. 
tons cwt. qr. lb. 
1 
17 1 2 8 
4 10 2 8 
2 
4 
3 
1 
1 
, 21 6 1 4 
4 2 2 8 
3 
3 
1 
1 
19 1 1 4 
5 9 0 0 
4 
3 
2 
2 
10 
23 19 2 8 
5 Ui 1 4 
5 
4 
3 
2 
2 
24 14 1 20 
4 14 1 4 
6 
3 
2 
2 
20 17 2 8 
4 15 0 16 
7 
3 
1 
1 
10 
24 11 1 4 
5 3 0 0 
8 
4 
1 
1 
1 
23 5 1 4 
4 7 3 12 
9 
— 
16 5 0 16 
4 17 2 24 
The soil is a deep, rich, and friable loam upon white sand. 
These experiments -were in exact repetition of several previous 
ones, -with the object, amongst others, of .showing the value, if 
any, of superphosphate for mangel, and the relative advantages of 
common salt and muriate of potash. In the present instance, and 
for the first time in the history of the Norfolk experiments, the 
effects of the superphosphate were clearly beneficial. And contrary 
also to, at any rate, some former experience, the potash proved itself 
more useful than the common salt. The most economical manure, 
for the land and season, was a mixture of 4 cwt. superphosphate, 
1 cwt. muriate of potash, and 2 cwt. of nitrate of soda, at a cost of 
about 40s. per acre. 
