150 
INVESTIGATIONS ON ROTHAMSTED SOILS. 
that the samples were collected in February and March, nearly a year 
having elapsed, therefore, since the application of the annual dress- 
ings of manure on each plat. Most of the nitric nitrogen present in 
the surface soil, therefore, would be mainly nitric nitrogen of the year 
before, which had uot been washed out by the winter drainage, or 
which, by upward diffusion under the influence of evaporation, had 
regained the surface, though there would, perhaps, be some small 
quantity formed by early spring nitrification. The winter had been 
more than ordinarily wet. 
The nitric nitrogen for all the plats sampled in 1882 is given in the 
following table. 
Professor Warington also determined the chlorin in the plats of 
two sections, and the results are given in the same table. 
Table 81.— Hoos field barley soils, samples collected February- March, 1882— Nitro- 
gen as nitrates ("nitric" nitrogen), and chlorin stated as parts per million of 
fine dry soil and as pounds per acre in first, second, and third depths of 9 inches 
each. 
NITRIC NITROGEN. 
Series. 
Plat. 
Parts per million of fine 
dry soil. 
Pounds per acre. 
First 9 
inches. 
Second 9 
inches. 
Third 9 
inches. 
First 9 
inches. 
Second 9 
inches. 
Third 9 
inches. 
Total (27 
inches). 
2.34 
1.81 
1.90 
5.92 
4.69 
5.06 
15.67 
2.52 
2. 18 
2.36 
6. 37 
5.65 
6.28 
18.30 
O 
1! 
2.41 
2. 19 
2. 43 
6.09 
5.68 
6.47 
18.24 
2.95 
3.75 
2.36 
7. 46 
9.73 
6.28 
23.47 
2.42 
3.20 
2. 61 
6.12 
8.30 
6. 95 
21.37 
2.93 
4.43 
3.07 
7.41 
11.49 
8.17 
27. 07 
A ... 
(1 
3. !t7 
2.38 
2.11 
7.51 
6. 17 
5.61 
19.29 
3.20 
2.22 
3.34 
8.09 
5. 76 
8.89 
22. 74 
3.84 
2.03 
3.38 
9.71 
6.82 
8.99 
25 52 
AA 
3.09 
4.02 
3. 10 
7.81 
10.43 
8.25 
26.49 
(! 
3.07 
2.39 
3.04 
7. 76 
6.20 
8.09 
22.05 
3. 72 
2.19 
2.34 
9.40 
5.68 
6.23 
21.31 
f 1 
4.50 
5.28 
2.98 
10.613 
13. 70 
7.93 
32. 26 
C 
J 2 
3. 16 
5.03 
2.94 
7.46 
13. 05 
7.82 
28. 33 
1 3 
4.48 
4.31 
3.56 
10.58 
11. 18 
9. 47 
31.23 
I 4 
3.48 
4.44 
3.27 
8.22 
11.52 
8.70 
28.44 
7 
{ I 
5.9(5 
8.92 
4.54 
5.62 
4.09 
4. 10 
14. 82 
18.59 
11.78 
14.58 
10.88 
10. 91 
37.48 
44.08 
CHLORIN. 
3.31 
6.98 
6. 77 
8.37 
18.11 
18.02 
44.50 
3.30 
7. 17 
12. 73 
8.34 
18.60 
31.88 
60.82 
o 
(! 
3.27 
7.40 
7.00 
8.27 
19. 19 
18. 68 
46.09 
2.81 
10.65 
14. 37 
7.10 
27.62 
38.24 
72. 88 
3.14 
7.M 
9. 56 
7.94 
19.82 
25.44 
68.80 
8.86 
15. 28 
13. 59 
9.76 
39. 03 
86. 16 
85. 55 
A 
1! 
5. 29 
6. 56 
6.88 
13.37 
17.02 
18.31 
48. 70 
3.68 
6.89 
12.71 
9. 30 
17. 87 
3$. 82 
60. 9U 
It will be seen that on the O section, to which no nitrogen is applied, 
the largesl quantity of nitric nitrogen, in the first and second depths, 
is found in the plat that contains the largest quantity of total nitrogen, 
