26 
INVESTIGATIONS ON ROTHAMSTED SOILS. 
Table 9. — Broadbalk wheat soils, sampled in October, 1893 — Percentage of nitro- 
gen in fine dry soil, as determined, respectively, by the soda-lime method and by 
the Kjeldahl method: also the percentage of "nitric"' nitrogen (nitrogen existing 
in the form of nitrates). 
Plat 2a... 
Plat 8b 
Plat 3 
Plat 4 
Plat 5..-. 
PlatG.... - 
Plat 7 
Plat 8.... 
Plat 9a 
Plat 9b ■ 
Plat 10a.. 
Plat 10b 
Plat 11 
Plat 12... 
Plat 13 
Plat 14 
Plat 15 
Plat It} 
Plat 17.. 
Plat 18 
Plat 19 
Average, exclud- 
ing 2a and 2b ... 
Average, all plats 
First 9 inches. 
Total nitrogen. 
By sod a- 
lime. 
Per cent, 
0. 1520 
.2132 
.0940 
.0906 
.0971 
.1076 
.1146 
.1167 
.1116 
. 1058 
. 1002 
. 1029 
.1119 
.1110 
.1088 
.1204 
.1188 
.1110 
.1117 
.1204 
.1309 
By Kjel- 
dahl. 
1098 
1167 
Pei cent. 
0. 1628 
.2207 
.(1992 
. 0982 
.1013 
.1107 
1222 
.' 1188 
.1189 
. 1094 
.1069 
.1064 
.1131 
.1194 
.1162 
. 1250 
.1234 
.1177 
.1174 
. 1232 
.1348 
Kjeldahl 
( + ) or 
( — ) soda- 
lime. 
' Nitric 1 
nitro- 
gen. 
Per cent, 
+0.0108 
+ .0075 
+ .0052 
+ .0076 
+ .0042 
+ .0031 
+ .0076 
+ .0021 
+ .0073 
+ .0036 
+ 
+ 
+ 
+ 
.1149 
. 1222 
0067 
0035 
0012 
0084 
. .0074 
+ .0046 
+ .0046 
+ .0067 
+ .0057 
+ .0028 
+ .0039 
+ .0051 
+ .0055 
Per cent. 
0. 000943 
. 000451 
. 000372 
.000307 
.000406 
.000545 
. 000577 
.000671 
. 000641 
.000428 
.000483 
.000364 
.000450 
. 000546 
. 000537 
.000516 
.000386 
. 000524 
.000470 
. 000449 
. 000855 
.000501 
.000580 
Second 9 inches. 
Total nitrogen. 
By soda 
lime. 
Per cent. 
0.0761 
.0712 
.0696 
.0670 
.0684 
.0671 
.0598 
.0696 
.0765 
.0778 
.0789 
.0765 
.0747 
.0791 
.0686 
.0748 
.0809 
.0708 
.0731 
.0701 
.0776 
.0728 
By Kjel- 
dahl. 
1730 
Per cent, 
0. 0811 
.07tt 
.0' 
.0783 
.0739 
. 0720 
.0681 
.0752 
.0849 
.0799 
.0817 
.0820 
.0812 
.0840 
.0757 
.0804 
.0842 
.0783 
.0777 
.0793 
.0794 
Kjeldahl 
( + ) or 
(— ) soda- 
lime. 
Per cent. 
+0.0051 
+ .0055 
+ .0034 
+ .0113 
+ .0055 
+ .0049 
+ .0083 
+ .0056 
+ .0084 
+ .0021 
+ .0028 
+ .0055 
+ .0065 
+ .0049 
+ .0071 
+ .0056 
+ .0033 
+ .0075 
+ .0046 
+ .0092 
+ .0018 
.0784 + .0056 
Nitric' 
nitro- 
gen. 
Per cent. 
0.000848 
. 001(598 
.000345 
. 000263 
.000238 
.000477 
.000719 
.001092 
.000720 
.001305 
.000952 
.001088 
.000920 
.000954 
.000979 
.001160 
.000700 
. 001594 
.001037 
.001553 
.000912 
1100931 
Plat 2a 
Plat 2b _ 
Plat 3 
Plat 4. 
Plat 5 
Plat 6 
Plat 7 
Plat 8 
Plat 9a 
Plat 9b 
Plat 10a 
Plat 10b 
Plat 11 
Plat 12 
Plat 13 
Plat 14 
Plat 15 
Plat 18 
Plat 17 
Plat 18 
Plat 19 
Average, all plats 
Third 9 inches. 
Total nitrogen. 
By soda- By Kjel- 
lime. dahl. 
Per 
0. 
cent 
0645 
0828 
0594 
0573 
0500 
0558 
0527 
0587 
0609 
0649 
067* 
0082 
0622 
0676 
0566 
0635 
0578 
0806 
061 16 
0606 
0697 
.0613 
Kjeldahl 
( + ) or 
(— ) soda- 
lime. 
Per cent. 
0. 0660 
. 0650 
.0651 
.0644 
.0645 
. 0628 
.0583 
.0630 
.0696 
.0690 
.0706 
,0698 
.0672 
. 0733 
.0850 
. 0650 
. 0693 
.0655 
.0671 
.0863 
.0719 
Per cent 
+0.0015 
+ .0028 
+ .0057 
+ .0071 
+ .0085 
+ .0070 
+ .0056 
+ .0043 
+ .0087 
+ .0041 
+ .0028 
+ .0014 
+ .0050 
+ .0057 
I .0084 
+ .0015 
I .0015 
+ .0049 
+ .0085 
+ .0057 
+ .0022 
Nitric ' 
nitro- 
gen. 
+ .0058 
Per cent, 
0.000368 
.000439 
. 000098 
.000076 
.000080 
. 000208 
.000306 
. 000312 
.000240 
. 000558 
.000403 
.000501 
.000533 
.000435 
.000338 
1422 
. 000377 
.000744 
.000306 
.000229 
000508 
,000858 
Fourth 9 inches. 
Total nitrogen. 
By soda- 
lime. 
By Kjel- 
dahl. 
Kjeldahl 
( + ) or 
(— ) soda- 
lime. 
"Nitric" 
nitro- 
gen. 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
0. 0458 
. 0448 
.0501 
.0567 
0524 
. 0469 
.0466 
. 0546 
+0. 0066 
+ .0021 
- .0035 
- .0021 
0.000034 
.000107 
.000191 
.000313 
.0138 
. 0569 
.0514 
.0399 
.0390 
0163 
.0468 
.0467 
.0585 
. 0634 
.0528 
.0441 
.0441 
. 0521 
.0497 
.0481 
+ .0147 
+ .0005 
+ .0014 
+ .0042 
+ .0051 
+ .0058 
+ .0029 
+ .0014 
. 000419 
.000268 
. 000168 
.lion:.' 16 
.000284 
. 000468 
; 000103 
.000121 
.0474 
.0511 
+ .0037 
.000223 
