394 
The Woburn Field Experiments , 1913. 
Table I . — Continuous Growing of Wheat , 1913. 
(37 th Season). 
(Wheat grown year after year on the same land, the manures being applied 
every year.) 
Stackyard Field— Produce per acre. 
Head corn 
Tail 
corn 
Straw, 
Value 
per 
quarter 
on basis 
of 
32s. 
Plot 
Manures per acre 
No. of 
bush. 
Weight 
per 
bushel 
-+3 
bj> 
*5 
£ 
chaff, 
&c. 
1 
Unmanured .... 
12-3 
Lb. 
6U2 
Lb. 
20 
C.q. lb. 
10 2 8 
s. d. 
30 0 
2a 
Sulphate of ammonia (=25 lb. 
ammonia) .... 
12 
1 0 1 
30 0 
2aa 
As 2a, with 5 cwt. lime, Jan., 
1905, repeated 1909, 1910 and 
1911 
12-8 
62'5 
52 
8 3 0 
29 0 
2b 
As 2a, with 2 tons lime, Dec., 
1897 
15-5 
62-6 
64 
9 2 0 
30 0 
2bb 
As 2b, with 2 tons lime (re- 
peated), Jan., 1905 
133 
64-0 
112 
11 1 21 
31 0 
3a 
Nitrate of soda(=50 Ib.ammonia) 
20-8 
57-4 
80 
19 1 7 
28 0 
3b 
Nitrate of soda(=25 Ib.ammonia) 
17-4 
57-4 
54 
14 0 11 
28 0 
4 
Mineral manures (superphos- 
phate, 3 cwt. ; sulphate of 
potash, ^ cwt.) 
12-0 
60'5 
19 
11 2 16 
31 0 
5a 
Mineral manures and sulphate 
of ammonia (=25 lb. ammonia) 
12-7 
58-7 
44 
11 1 8 
29 0 
5b 
As 5a, with 1 ton lime, Jan., 
1905 ..... 
23-3 
621 
36 
15 3 10 
31 6 
6 
Mineral manures and nitrate 
of soda (=25 lb. ammonia) . 
22-6 
60-5 
60 
19 3 14 
30 0 
7 
Unmanured .... 
14-7 
61-3 
21 
10 1 7 
31 6 
8a 
Mineral manures and (in alter- 
nate years) sulphate of 
ammonia (=50 lb. ammonia) 
5-6 
62-0 
32 
6 1 21 
29 0 
8aa 
As 8a, with 10 cwt. lime, Jan., 
1905 
14-4 
60-0 
56 
12 2 2 
28 0 
8b 
Mineral manures, sulphate of 
ammonia (=50 lb. ammonia) 
omitted (in alternate years). 
28 
1 1 5 
31 6 
8bb 
As 8b, with 10 cwt. lime, Jan., 
1905 
11*0 
60-0 
60 
9 3 4 
29 0 
9a 
Mineral manures and (in alter- 
nate years) nitrate of soda 
(=50 lb. ammonia) 
24-2 
60-1 
46 
22 0 4 
30 0 
9b 
Mineral manures, nitrate of 
soda (=50 lb. ammonia) 
omitted (in alternate years) . 
15-2 
60-7 
36 
13 2 6 
31 0 
10a 
Superphosphate 3 cwt., nitrate 
of soda (=25 lb. ammonia) . 
18-8 
59-2 
66 
15 3 10 
29 0 
10b 
Rape dust (=25 Ib.ammonia). 
19*3 
6U5 
50 
18 1 20 
31 0 
11a 
Sulphate of potash 1 cwt., ni- 
trate of soda (=25 lb. am- 
monia) ..... 
18-3 
58-9 
56 
16 1 13 
29 0 
lib 
Farmyard manure (=100 lb. 
ammonia) .... 
22*8 
60-6 
42 
26 0 0 
30 0 
