284 The Woburn Field Experiments , 1905 and 1906 
Table I . — Continuous Crowing of Wheat , 1905 (29 th Season ), and 
1906 (30 th Season). 
(Wheat grown year after year on the same land, the manures being applied every year.) 
Stackyard Field — Produce per acre. 
1905 
1906 
Head corn 
Tail 
corn 
Value 
per 
Head corn 
Tail 
corn 
Value 
Plot 
Manures per acre 
Straw, 
Straw, 
per 
quarter 
on basis 
No. 
Wgt. 
-U> 
r*j 
chaff, 
&c. 
quarter 
on basis 
No. 
Wgt. 
chaff, 
&c. 
of 
per 
of 2tts. 
of 
per 
97.S fir/. 
bush. 
bush. 
• 
bush. 
bush. 
£ 
Lb. 
Lb. 
0. 
q. lb. 
s. 
d. 
Lb. 
Lb. 
C. q. lb. 
s. 
d. 
1 
Unmanured . . v . 
4'8 
58-0 
28 
7 
0 9 
27 
0 
9‘3 
62'5 
30 
8 0 15 
26 
6 
2a 
i Ammonia salts (contain- 
ing 50 lb. ammonia) 
No 
crop 
3'4 
56-0 
16 
4 1 20 
26 
0 
2aa 
As 2a, with 5 cwt. lime, 
Jan.. 1905 .... 
No 
crop 
19’2 
62'5 
32 
16 0 25 
26 
6 
2b 
As 2a, with 2 tons lime, 
Dec., 1897 .... 
10'2 
60’0 
53 
9- 
1 0 
28 
6 
261 
61'5 
60 
20 1 8 
26 
6 
2bb 
As 2b, with 2 tons lime 
(repeated), Jan., 1905 
8’9 
58'0 
69 
8 
0 16 
27 
0 
25'5 
58'5 
116 
22 2 12 
25 
0 
3 
Nitrate of soda (contain- 
ing nitrogen = 50 lb. 
ammonia) .... 
10’2 
551 
188 
14 
2 8 
26 
0 
23-0 
58’2 
144 
22 3 11 
25 
0 
4 
2 Mineral manures . 
9'3 
57'5 
72 
9 
3 10 
28 
0 
6'8 
60-2 
26 
7 0 25 
26 
0 
5a 
Mineral manures and 
ammonia salts (contain- 
ing 50 lb. ammonia) 
25'2 
58*5 
57 
19 
3 4 
27 
0 
31-5 
62-4' 
62 
22 0 8 
26 
6 
5b 
As 5a, with 1 ton lime, 
Jan., 1905 .... 
19'4 
60-5 
97 
18 
2 16 
29 
0 
31'0 
63-5 
60 
19 3 4 
27 
0 
6 
Mineral manures and 
nitrate of soda (contain- 
ing nitrogen=50 lb. am- 
monia) .... 
21-2 
577 
211 
22 
3 10 
28 
6 
217 
60'0 
133 
18 1 22 
26 
0 
7 
Unmanured 
14-2 
607 
143 
12 
3 21 
28 
6 
1P5 
61'2 
28 
8 2 24 
26 
6 
8a 
Mineral manures and (in 
alternate years) am- 
monia salts (=100 lb. am- 
monia) .... 
8'4 3 
60-0 
40 
9 
212 
29 
0 
10'6 4 
560 
24 
8 2 24 
25 
6 
8aa 
As 8a, with 10 cwt. lime, 
Jan., 1905 . . . . 
14‘2 3 
60’0 
65 
11 
1 24 
29 
0 
21 d 4 
62'2 
40 
15 0 20 
26 
6 
8b 
Mineral manures, am- 
monia salts (=100 lb. 
ammonia) omitted (in 
alternate years) 
10'2 4 
600 
48 
9 
1 0 
28 
6 
28'0 3 
620 
48 
21 2 0 
27 
o • 
8bb 
As 8b, with 10 cwt. lime, 
Jan., 1905 .... 
18'2 4 
62'0 
97 
14 
1 24 
29 
6 
347 3 
622 
44 
23 2 20 
27 
0 
9a 
Mineral manures and (in 
alternate years) nitrate 
of soda (containing 
nitrogen = 100 lb. am- 
monia) .... 
26'6 3 
58'5 
203 
27 
110 
28 
6 
7'4 4 
60'0 
24 
8 0 0 
26 
0 
9b 
Mineral manures, nitrate 
of soda (containing 
nitrogen = 100 lb. am- 
monia) omitted (in alter- 
10a 
nate years) 
1889, rape cake (=50 lb. 
15'3 4 
607 
109 
13 
216 
29 
0 
35'2 3 
61-5 
204 
35 0 22 
26 
6 
ammonia). No manure 
since 
121 
59-2 
59 
10 
1 10 
29 
0 
15-9 
61'0 
26 
12 0 4 
26 
6 
10b 
Rape cake (=100 lb. am- 
11a 
monia) every year since 
1890 
20'2 
60-5 
128 
19 
3 24 
29 
0 
34-5 
63-0 
56 
28 3 22 
26 
6 
1877-81, farmyard manure 
lib 
(=200 lb. ammonia). No 
manure since . 
16-3 
61-9 
88 
15 
120 
29 
0 
13*6 
61-2 
48 
10 3 4 
26 
6 
Farmyard manure (= 
200 lb. ammonia) every 
year 
321 
6P9 
161 
32 
1 0 
30 
0 
162 
61'2 
28 
17 1 4 
26 
6 
1 Ammonia salts are equal weights of sulphate of ammonia and muriate of ammonia. 
j 2 Mineral manures are, throughout, 3£ cwt. superphosphate of lime, 200 lb. sulphate of 
potash, 100 lb. sulphate of soda, 100 lb. sulphate of magnesia per acre. 
3 Applied. 4 Omitted. 
