30 
INVESTIGATIONS ON ROTHAMSTED SOILS. 
Table 11. — Broadbalk wheat soils, etc.— Continued. 
SECOND 9 INCHES. 
Annual manuring. 
Nitro- 
gen per 
acre 
in 
ma- 
nure. 
Lbs. 
200 
200 



43 
86 
129 
43 
43 
93 
Average (all plats) . 
Total 
nitro- 
gen. 
Per ct. 
0.0811 
.0767 
.0730 
. 0783 
.0739 
.0720 
.0681 
. 0752 
.0849 
.0799 
.0817 
. 0820 
.0812 
.0840 
.0757 
.0804 
.0842 
.0783 
' .0777 
. 0793 
.0794 
. 0784 
Nitro- 
gen as 
ni- 
trates 
per 
mil- 
lion. 
Parts. 
8.48 
16. 98 
3.45 
2.63 
2.38 
4. 77 
7.19 
10. 92 
7.20 
13. 05 
9.52 
10. 88 
9.20 
9.54 
9.79 
11.60 
7.00 
15. 94 
10. 37 
15. 53 
9.12 
Car- 
bon. 
Per ct. 
0.645 
.748 
.565 
.600 
.587 
.583 
.530 
.608 
. 651 
.640 
.668 
.656 
. 643 
.643 
.630 
.629 
.727 
.682 
.650 
.630 
.719 
Per acre 
Ratio of- 
31 
.640 
Total 
nitro- 
gen. 
Lbs. 
2, 166 
2,049 
1,950 
2,092 
1,974 
1,923 
1,819 
2, 009 
2, 368 
2,134 
2,182 
2, 190 
2, 169 
2,244 
2, 022 
2, 148 
2, 249 
2, 092 
2.076 
2,118 
2, 121 
2,095 
Lbs. 
22. 65 
45. 36 
9.22 
7.03 
6.36 
12. 74 
19.21 
29.17 
19. 2:5 
34. 86 
25. 43 
29. 06 
24.58 
25. 48 
26. 15 
30.99 
18.70 
42. 58 
27.70 
41.49 
24. 36 
24.87 
Lbs. 
17,230 
19,981 
15,093 
16,028 
15.681 
15. 574 
14, 158 
16.242 
17,390 
17, 096 
17,844 
1 7. 524 
17,177 
17, 177 
16,829 
16,803 
19, 421 
18, 218 
17, 364 
16, 829 
19, 307 
17.093 
THIRD 9 INCHES. 
2a 
200 
0.0660 
3.68 
0.515 
1,842 
10. 27 
14, 376 
7.8 
12.8 
2b 
200 
.0656 
4.39 
.492 
1,831 
12.25 
13, 734 
7.5 
13.3 
3 

.0651 
.98 
.483 
1,817 
2.74 
13,483 
7.4 
13.5 
4 

.0644 
.76 
.463 
1,798 
2. 12 
12,925 
7.2 
13.9 
5 

. 0645 
.80 
.446 
1,801 
2.23 
12, 450 
6.9 
14.5 
6 
43 
.0628 
2.08 
.429 
1,753 
5.81 
11,976 
6.8 
14.6 
7 
86 
.0583 
3.06 
.426 
1,627 
8.54 
11, 892 
7.3 
13.7 
8 
129 
. 0630 
3. 12 
.443 
1,759 
8. 71 
12,366 
7.0 
14.2 
9a 
43 
.0696 
2. 40 
.5.35 
1,943 
6.70 
14.9&5 
7.7 
13.0 
9b 
43 
.0690 
5.58 
.524 
1,926 
15.58 
14,627 
7.6 
13.2 
10a 
86 
.0706 
4.03 
.526 
1,971 
11. 25 
14, 683 
7.4 
13.4 
10b 
86 
.0696 
5.01 
.524 
1,943 
13. 99 
14, 627 
7.5 
13.3 
11 
86 
.0672 
5.33 
.492 
1,876 
14.88 
13, 734 
7.3 
13.7 
12 
86 
.0733 
4.35 
.526 
2,046 
12. 14 
14,683 
7.2 
. 13.9 
13 
86 
. 0650 
3.38 
.477 
1,814 
9. 44 
13, 315 
7.3 
L3.6 
14 
86 
. 0650 
4.22 
. 502 
1,814 
11.78 
14,013 
7.7 
12.9 
15 
86 
. 0693 
3. 77 
.535 
1,935 
10. 52 
14, 9&5 
7.7 
12.9 
16 
86 
.0655 
7.44 
.438 
1,828 
20. 77 
12,227 
6.7 
14.9 
17 
f .0671 
3.06 
. 492 
1,873 
8. 54 
13, 734 
7.3 
L3.6 
18 / 
86 
\ .0663 
2.29 
.478 
1,851 
6.39 
13, 343 
7.2 
13.9 
19 
93 
. 0719 
5.08 
.587 
2,007 
14.18 
16, 386 
8.2 
12.2 
Average (all plats) . 
. 0666 
3.56 
.492 
1,860 
9.94 
13, 7&5 
7.4 
13.5 
FOURTH 9 INCHES. 
5 

0. 0524 
0.34 
0.310 
1,459 
0.95 
8, 629 
5.9 
16.9 
6 
43 
.0169 
1.07 
.263 
1,305 
2. 98 
7,321 
5.6 
17.8 
7 
86 
.0466 
1.91 
.343 
1,297 
5. 32 
9,547 
7.4 
13.6 
8 
129 
.1)546 
3. 13 
.409 
1,520 
8.71 
11,384 
7.5 
13.3 
11 
86 
0585 
4. 19 
.371 
1,628 
LI. 66 
1, 1.327 
6.3 
15.8 
12 
86 
.11631 
2.68 
.413 
1,765 
7. 46 
II. 196 
6.5 i 
15.3 
13 
86 
. 0528 
1.68 
III 
1,470 
4.68 
LI, 524 
7.8 
12.7 
14 
86 
.((441 
2.46 
. 329 
1 , 228 
6. 85 
9, 15S 
7. 5 
13.4 
15 
86 
.0111 
2.34 
. 209 
1,228 
6.51 
7, 488 
6.1 
16.4 
16 
86 
.0521 
4. 68 
. 329 
1.450 
13.03 
9,1 58 
6.3 
15.8 
17 
/ .0197 
1.03 
.307 
1 . 3S3 
2. 87 
8,545 
6.2 
16.2 
18 
} 
8(5 
I .0481 
1.21 
.315 
1.3:«t 
3.37 
8,768 
6. 5 
15.3 
Average (all plat si 
.0511 
2.23 
. 339 
1,423 
6.40 
9,445 
6.6 
15.1 
