Rotation of Crops. 617 
Table: VI . — Experiments on the Rotation of — Roots , Barley , Clover (or 
Beans), or Fallow, and Wheat ; in Agdell Field, Rothamsted. 8 courses, 
32 years, 1852-1883. 
AVERAGE AMOUNTS OF NITROGEN PER ACRE IN THE ROTATION CROPS. COMPARED WITH 
THOSE IN THE CROPS GROWN CONTINUOUSLY. 
Unmanureil 
Superphosphate 
Mixed mineral and 
nitrogenous manure 

Roots carted 
Roots fed 
Roots carted 
Roots fed 
Roots carted 
| Roots fed 
Fal- 
Beans 
Fal- 
Beans 
Fal- 
Beans 
Fal- 
Beaus 
Fal- | Beans 
Fal- 
Beans 
low 
or 
clover 
low 
or 
clover 
low 
or 
clover 
low 
or 
clover 
low Jclover 
low 
or 
clover 
SWEDISH TURNIPS. 
( Rotation . . . 
Roots i Continuous 1 . . 
\ Rotn.+ or — cont. 
lb. 
9-4 
6-8 
lb. 
5- 8 
6- 8 
lb. 
8-5 
8-8 
lb. 
5- 3 
6- 8 
lb. 
28-7 
13-6 
lb. 
288 
13-6 
lb. 
32-9 
138 
lb. 
32-2 
13-6 
lb. 
66-3 
40-1 
lb. 
66'7 
40-1 
lb. 
68-2 
40-1 
lb. 
655 
401 
2-8 
-1-0 
1-7 
-1-5 
151 
13-2 
19-3 
18-6 
26*2 
26-8 
28-1 
254 
( Rotation . . . 
21 
1-8 
1-9 
1-6 
6*1 
6-5 
6-9 
7-6 
12-2 
139 
130 
139 
Leaves j Continuous 1 . . 
2-0 
2*0 
2-0 
2-0 
5-8 
5-8 
5-8 
5-8 
14-1 
141 
141 
141 
V Rotn. + or —cont. 
01 
-0-2 
-o-i 
-0-4 
03 
0-7 
11 
1-8 
-1-9 
-0*2 
-1-1 
-0'2 
( Rotation . . . 
11-5 
76 
10-4 
6*9 
34-8 
33-3 
39-8 
39'8 
78-5 
806 
81-2 
79-4 
Total ■! Continuous 1 . . 
8-8 
8-8 
8-8 
8-8 
19-4 
19-4 
19-4 
19-4 
54-2 
54-2 
54-2 
54-2 
V Rotn.-f or —cont. 
2-7 
-1-2 
1-8 
-1-9 
15-4 
13*9 
20-4 
20-4 
24-3 
26-4 
27-0 
25-2 
BARLEY. 
Rotation . . . 
21-5 
230 
21-5 
201 
17-8 
17-8 
22-9 
24-6 
29-7 
30-7 
350 
34-9 
Grain 
Continuous . . 
13-5 
13 5 
13-5 
13-5 
15-5 
15*5 
15-5 
15-5 
352 
35*2 
35-2 
352 
Rotn.+ or —cont. 
80 
9-5 
8-0 
8-8 
2*3 
2-3 
7-4 
91 
-5*5 
-4*5 
-0*2 
-0-3 
Rotation . . . 
8-6 
7-4 
8-0 
8-8 
55 
57 
75 
7-9 
95 
10*0 
12-5 
11*9 
Straw 
Continuous . . 
4*2 
4*2 
4-2 
42 
4'5 
4-5 
4-5 
4-5 
1 1-4 
11-4 
11-4 
11-4 
Rotn.-t- or —cont. 
2*4 
3-2 
2-4 
24 
1-0 
1-2 
3-0 
34 
-1-9 
-1-4 
1-1 
0*5 
Rotation . . . 
28-1 
30-4 
28-1 
2G-7 
23-3 
23-5 
30-4 
32-5 
39*2 
40-7 
47-5 
46*8 
Total 
Continuous . . 
17-7 
17-7 
1 7 7 
17-7 
20-0 
20-0 
20-0 
20-0 
46*6 
46*6 
46*6 
46*6 
Rotn.+ or — cont. 
10-4 
12-7 
10-4 
9-0 
3-3 
3, 
10-4 
12-5 
-7*4 
-5*9 
0-9 
0*2 
BEANS (8 COURSES), CLOVER (2 COURSES), OR FALLOW. 
Corn 
Rotation . . . 
Continuous . . 
Rotn.-l- or— cont. 
27-5 
9-7 
27-2 
9-7 
30-4 
10-5 
36-6 
10-5 
49-6 
21-4 
55-7 
21-4 
17-8 
1 
17-5 
19*9 
2G-1 
28-2 
34*3 
Rotation . . . 
9*4 
8-9 
10-1 
12-4 
14-0 
14-5 
Straw 
Continuous . . 
4*6 
4*6 
5*5 
5-5 
71 
7-1 
Rotn.+ or —cont. 
4-8 
4-3 
4-8 
6*9 
6-9 
7*4 
Rotation . . . 
36*9 
381 
40*5 
49-0 
63-6 
70-2 
Total - 
Continuous . . 
14-3 
14-3 
16-0 
16-0 
28-5 
285 
Rotn.+ or —cont. 
22*6 
1 
21-8 
24-5 
1 
330 
35-1 
41-7 
Rotation . . . 
55-0 
47-0 
124-5 
144-6 
187-0 
168-4 
Continuous . . 
? 
.? 
? 
? 
? 
? 
Average of 8 courses, | 
41*5 
38*9 
61*5 
72*9 
89*5 
94*7 
Beans and Clover / 
WHEAT. 
Rotation . . . 
26-2 
237 
25-5 
21-5 
27-2 
25-4 
28-6 
28-2 
28-9 
30-1 
27-7 
301 
Grain 
Continuous . . 
11-6 
11-8 
11-6 
118 
13-9 
13-9 
13-9 
13*9 
23*9 
23-9 
23*9 
23-9 
.1 
Rotn.+ or —cont. 
14-6 
12-1 
13 9 
9*9 
13-3 
11-5 
14-7 
14-3 
5*0 
6*2 
3*8 
0-2 
Rotation . . . 
10-4 
9-1 
9*9 
8-2 
11-8 
10-5 
12-3 
11-7 
13 2 
13 6 
13'8 
131 
Straw 
Continuous . . 
5*4 
5-4 
51 
5-4 
5-9 
5*9 
5*9 
5-9 
10-1 
10-1 
10*1 
10-1 
Rotn.-l- or — cont. 
50 
3-7 
4*5 
2*8 
5*9 
4-8 
6*4 
5-8 
31 
3*5 
3-7 
30 
Rotation . . . 
36*6 
32-8 
35-4 
29*7 
39*0 
35-9 
40*9 
39*9 
421 
43-7 
41*5 
432 
Total 
Continuous . . 
17-0 
170 
170 
17-0 
19 8 
19-8 
19*8 
19-8 
34-0 
340 
34-0 
340 
Rotn.+ or —cont. 
19-6 
15-8 
18-4 
12-7 
19-2 
161 
211 
201 
8-1 
9-7 
7-5 
9-2 
* Average 19 years, 1849-52 and 1856-70. 
