623 
Botation of Crops. 
Table VII. — Experiments on the Rotation of— Roots, Barley, Clover (or Bean), 
or Fallow , and Wheat ; in Ay dell Field, Rothamsted. 8 courses, 
32 years, 1852 - 1883 . 
AVERAGE AMOUNTS OF MINERAL MATTER (AS//) PER ACRE IN THE ROTATION CROPS, 
COMPARED WITH THOSE IN THE CROPS GROWN CONTINUOUSLY. 
Unmanured 
Superphosphate 
Mixed mineral and 
nitrogenous manure 
Roots carted 
! Roots fed 
Roots carted 
Roots fed 
Roots carted 
Roots fed 
Fal- 
low 
Beans 
or 
clover 
Fal- 
low 
Beans 
or 
clover 
Fal- 
low 
Beans 
or 
clover 
Fal- Beans 
* ow | clover 
Fal- 
low 
Beans 
or 
clover 
Fal- 
low 
Beaus 
or 
clover 
SWEDISH TURNIPS. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
Rotation . . . 
15-7 
9-5 
13-8 
8-8 
74-1 
71-3 
82-5 
81-9 
167-8 
171-2 
1824 
172-3 
1 Roots 
Continuous 1 . . 
10-9 
10-9 
10-9 
10-9 
40-0 
40-0 
40-0 
40-0 
100-3 
100-3 
100-3 
100-3 
Rotn.+ or — cont. 
4-8 
-1-4 
2-9 
-2-1 
34-1 
31-3 
42-5 
41-9 
67-5 
70-9 
82-1 
72-0 
Rotation . . . 
6-7 
6-0 
6 -6 
5-9 
17-9 
20-4 
19-2 
22-9 
35-2 
41-9 
40-1 
416 
Leaves - 
Continuous 1 . . 
5-9 
5-9 
5-9 
5-9 
16-4 
16-4 
16-4 
16-4 
40-5 
40-5 
40-5 
40-5 
Rotn. +or —cont. 
0-8 
0-1 
0-7 
0-0 
1-5 
4-0 
2-8 
6-5 
-5-3 
1-4 
-0-4 
1-1 
Rotation . . . 
22-4 
15-5 
20-4 
■•‘14-7 
92-0 
91 7 
101-7 
104-8 
203-0 
213-1 
222-5 
213-9 
Total • 
Continuous ’ . . 
168 
16-8 
1G-8 
16-8 
56-4 
56-4 
56-4 
56-4 
140-8 
140-8 
140-8 
140-8 
l.Rotn.+ or — cont. 
5'6 
-1-3 
3-6 
-2-1 
35-G 
35-3 
45-3 
48-4 
62-2 
72-3 
81-7 
73-1 
BARLEY. 
Rotation . . . 
34-8 
35-9 
34-2 
30-7 
34-9 
33-8 
44'1 
45-9 
50-7 
51-5 
58-1 
57-7 
I Grain 
Continuous . . 
21-5 
21-5 
21-5 
21-5 
28-4 
28-4 
28-4 
28-4 
58-8 
58-8 
58-8 
58-8 
1 
Rotn. + or —cont. 
13-3 
14-4 
12-7 
9-2 
6’5 
5-4 
15-7 
1 7*5 
-81 
-7-3 
-0-7 
-1-1 
Rotation . . . 
81-3 
87-5 
79-2 
76-1 
75-6 
77-7 
96-9 
99-8 
113-5 
116-8 
145-6 
144-9 
1 Straw 
Continuous . . 
47-3 
47-3 
47-3 
47-3 
55-6 
55-6 
55-6 
55-6 
130-6 
130-6 
130-6 
130-6 
Rotn. 4 - or —cont. 
34-0 
40-2 
31-9 
28-8 
200 
22-1 
41-3 
44-2 
-17-1 
-13-8 
150 
14-3 
Rotation . . . 
116-1 
123-4 
113-4 
2 l0G-8 
110-5 
111-5 
141-0 
145-7 
164-2 
108-3 
203-7 
202-6 
Total 
Continuous . . 
68-8 
68-8 
68-8 
688 
84-0 
84-0 
84-0 
84-0 
189-4 
189-4 
189-4 
189-4 
1 Rotn.-l- or — cont. 
47-3 
54-0 
44-6 
38-0 
26-5 
27-5 
57-0 
61-7 
-25-2 
-21-1 
14-3 
13-2 
BEANS (6 COURSES), CLOVER (2 COURSES), OR FALLOW. 
Rotation . . . 
18-5 
18-4 
20-2 
24-1 
35-8 
40-7 
1 Corn 
Continuous . . 
7.6 
. 7 ’ 6 
9-4 
9-4 
21-1 
21-1 
Rotn.-l- or —cont. 
10-9 
10-8 | 
10-8 
14-7 
14-7 
19-6 
Rotation . . . 
53-1 
53-3 
65-8 
72’5 
87-7 
90-8 
1 Straw 
Continuous . . 
28-5 
28-5 
351 
35-1 
54-2 
54-2 
Rotn. + or —cont. 
24-6 
24-8 
30-7 
37-4 
33-5 
36-6 
Rotation . . . 
71-6 
71-7 
86-0 
96-6 
123-5 
131-5 
, Total 
Continuous . . 
36-1 
36-1 
44-5 
44-5 
75-3 
75-3 
Rotn.-l- or — cont. 
35-5 
35-6 
41-5 
52-1 
48-2 
56-2 
j Clover ■ 
Rotation .... 
198-3 
-172-6 
421-3 
487-5 
569-8 
612-5 
Continuous . . 
1 
? 
? 
? 
? 
Average of 8 courses, ) 
Beans and Clover j 
103-3 
-96-9 
1G9-8 
194-3 
235-1 
251-7 
WHEAT. 
Rotation . . . 
26-3 
24-6 
26-6 
22-1 
29-6 
29-1 
30-0 
31-1 
30-6 
33-3 
29-5 
33-2 
Grain 
Continuous . . 
13-0 
13-6 
13-6 
13-6 
16-3 
16-3 
16-3 
16-3 
25-0 
25-0 
25-0 
25*0 
Rotn. + or — cont. 
12-7 
11-0 
12-0 
8-5 
13-3 
12-8 
13-7 
14-8 
5 6 
8-3 
4-5 
8-2 
Rotation . . . 
167-9 
157 9 
160-9 
143-5 
181-4 
172-4 
182-5 
182-0 
187-9 
198-9 
190-7 
196-7 
Straw • 
Continuous . . 
74*4 
74-4 
74-4 
74-4 
89-3 
89-3 
89-3 
89-3 
136-7 
136-7 
136-7 
136-7 
Rotn. 4- or — cont. 
93-5 
83-5 
86-5 
69-1 
92-1 
83-1 
93*2 
92-7 
51-2 
62-2 
54-0 
60-0 
Rotation . . . 
194-2 
182-5 
186-5 
“165-6 
211-0 
201-5 
212-5 
213-1 
218-5 
232-2 
220-2 
229-9 
Total 
Continuous . . 
88-0 
88-0 
88-0 
88-0 
105-6 
105-6 
105-6 
105-6 
161-7 
161-7 
161-7 
161-7 
Rotn.-l- or —cont. 
106-2 
94-5 
98-5 
77*6 
105-4 
95-9 
106-9 
107-5 
56-8 
70-5 
58-5 
68-2 
1 Average 10 years, 1840-52 and 1856-70. 2 Probably crop too low owing to a dell. 
T T 2 
