605 
Rotation of Crops . 
Table IV . — Experiments on the Rotation of— Roots, Barley, Clover (or Beans), or 
Fallow , and Wheat; in Agdell Field, Rothamsted. 11 courses, 44 years, 
1848-1891. 
4. WHEAT. 
Unmanured 
Courses 1-9 superphosphate 
only. Courses 10 and 11 
Mixed mineral and 
mixed mineral manure 
nitrogenous manure 
Years 
Roots carted 
Roots fed 
Roots carted 
Roots fed 
Roots carted 
Boots fed 
Beans 
Beans 
Beans 
Beans 
Beans 
Beans 
Fallow 
or 
Fallow 
or 
Fallow 
or 
Fallow 
or 
Fallow 
or 
Fallow 
or 
clover 
clover 
clover 
clover 
clover 
clover 
DRESSED 
GRAIN. 
Bush. 
Busli. 
Bush. 
Bush. 
Bush. 
Bush. 
Bush. 
Bush. 
Bush. 
Bush. 
Bush. 
Bush. 
1851 
30* 
m 
31* 
30* 
31* 
28 
1 32* 
32 
30* 
28* 
27* 
_5UL 
40$ 
1855 
37fJ 
35* 
37* 
34* 
38* 
35* 
37* 
36* 
38* 
37* 
37* 
1859 
354 
35* 
35* 
30* 
37* 
34* 
39* 
37* 
42* 
39* 
40* 
38* 
186:1 
45 
34* 
42 
30* 
46 
34* 
49* 
41* 
52* 
46* 
49 
44* 
1867 
27* 
21 
23* 
15* 
26* 
19* 
27* 
25 
22* 
23* 
19* 
21* 
1871 
14* 
20* 
H* 
21* 
16* 
23* 
15 3 
23 
17* 
24 
17* 
25* 
1875 
24* 
21 3 
24* 
19* 
28* 
28* 
30* 
31* 
29* 
31* 
30 
30* 
1879 
10* 
10* 
11* 
8* 
14* 
14* 
14* 
401 
15* 
12* 
13 
10* 
14 
1883 
33* 
29* 
34* 
25* 
38* 
36* 
40 
37* 
45* 
39* 
501 
43* 
1887 
34* 
25* 
33* 
27* 
41* 
42* 
40* 
44* 
391 
42* 
41 
1891 
32 
29* 
31* 
26* 
36 
42* 
40 
60* 
41 
44* 
45* 
42 
A v. 8 courses 1 
1855 to 1883 ) 
CO 
(M 
2G 
27* 
23* 
30* 
28* 
31* 
31* 
31* 
32* 
30* 
33* 
At. 2 courses 1 
1887 arid 1891 J 
33* 
27* 
32* 
26* 
38* 
42* 
40* 
471 
40* 
43* 
43* 
42* 
STRAW. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
Ih. 
1861 
3,273 
3,431 
! 3,498 
3,760 
3,497 
3,371 
3,834 
4.014 
3.610 
3,552 
3.969 
4.035 
1855 
4,295 
3,619 
4,070 
3,351 
4,286 
3,525 
4,492 
3,611 
4,952 
3,942 
5,107 
1869 
4,315 
4,030 
4,045 
3,355 
4,310 
3,930 
4,720 
4,320 
6,330 
4,610 
5,545 
1863 
4,563 
3,468 
4,295 
3,008 
4,690 
3,390 
5,051 
3,888 
5,495 
4,698 
5'638 
18C7 
2,654 
2,143 
2,598 
1,524 
2,774 
1,906 
2,989 
2,648 
2,850 
3,003 
2,905 
1871 
2,075 
2,799 
1,946 
2,655 
2,128 
3,048 
2,240 
2,980 
2,628 
3,440 
2,863 
1875 
2,833 
2,430 
2,851 
2,353 
3,230 
3,536 
3,625 
3,928 
3,623 
4,685 
4,085 
4*385 
1879 
1,493 
1,324 
1,612 
1,219 
1,956 
1,771 
1,843 
1,771 
1,091 
1,658 
1,426 
1883 
2,994 
2,280 
3,231 
2,060 
3,686 
3,021 
4,110 
3,275 
3.689 
4.024 
4.028 
4,505 
1887 
2,505 
1,859 
2,655 
1,844 
3,465 
3,298 
3,480 
3,468 
3,308 
3,423 
3,763 
1891 
2,941 
2,598 
2,898 
2,318 
3,586 
3,995 
4,103 
5,017 
4,288 
4,575 
4338 
<309 
Av. 8 courses 1 
1865 to 1883 / 
3,153 
2,762 
3,081 
2,441 
3,383 
3,023 
3,621 
3,303 
3,782 
3,758 
3,950 
3,821 
Av. 
1 887 
2 courses | 
and 1891 / 
2,723 
2,229 
2,777 
2,081 
3,526 
3,647 
3,792 
4,243 
3,798 
3,999 
4,350 
3,977 
TOTAL PRODUCE. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
1851 
5.290 
5,389 
5,584 
5,855 
5,617 
5,253 
6,062 
6,176 
5,642 
5,500 
5,801 
6,169 
1855 
6,735 
5,859 
6,473 
5,526 
6,756 
5,789 
6,961 
5,921 
7,428 
6,371 
7,499 
6,992 
1859 
6,582 
6,262 
6,270 
5,265 
6,671 
6,120 
7,242 
6,689 
8,066 
7,154 
8,136 
7,417 
1863 
7,446 
5,621 
6,999 
4,941 
7,626 
5,619 
8,194 
6,562 
8,837 
7,627 
8,747 
7,721 
1867 
4,330 
3,473 
4,126 
2,506 
4,420 
3,222 
4,702 
4,242 
4,328 
4,567 
4.180 
3,023 
1871 
3,004 
4,092 
2,840 
3,994 
3,133 
4,521 
3,193 
4,404 
3,747 
4,942 
3,925 
5,236 
1875 
4,412 
3,784 
4,396 
3,642 
5,065 
5,328 
5,443 
5,954 
5,448 
6,699 
5,942 
6,292 
1879 
2,162 
1,987 
2,351 
1,800 
2,905 
2,729 
2,755 
2,781 
2,478 
2,493 
2,100 
3,034 
1883 
5,140 
4.175 
5.445 
3,741 
6,208 
5.400 
6,778 
5.901 
6.1 32 
6.921 
6.536 
7.743 
1887 
4,689 
3,483 
4,811 
3,550 
6,103 
5,994 
6,105 
6,332 
5,894 
6,103 
6,410 
6,409 
1891 
4,868 
4,371 
4,763 
3,921 
5,742 
6,546 
6,509 
8,034 
6,748 
7,250 
7,610 
6311 
Av. 8 courses \ 
1 1855 to 1883 f 
4,976 
4,407 
4,863 
3,927 
.5,348 
4,841 
5,658 
5,307 
5,808 
5,847 
5,883 
5,932 
Av. 
4881 
2 courses t 
and 1891 f 
4,779 
3,927 
4,787 
3,736 
5,923 
6,270 
6,307 
7,183 
6,321 
6,677 
7,010 
6,610 
VOL. V. T. s. — 20 s s 
