THE BROADBALK WHEAT SOILS. 
135 
PHOSPHORIC ACID (18G5, 1881, AND 1893 RESULTS compared). 
The results of the phosphoric acid determinations made in the 1893 
samples have been already discussed (see p. ( »s). It now only remains 
to examine, for the purpose of comparison, the results obtained in the 
analyses of the two earlier sets of samples. The complete results are 
shown in the following table: 
Table 79. — Broadbatk wheat Both—Sampta ooUeoted in iS6S, issi y and 1893— 
Phosphoric- acid de& l imitations. 
FIRST !• INCHES OF SOIL. 
Dissolved by strong hydrochloric <>r nitric Dissolved by 1 per rent solution of eitrie 
acid, acid. 
1*65. 
1*81. 
1X93. 
1865. 
1881. 1893. 
Per 
(•••iit 
Pounds 
per 
acre 
P.r 
cent. 
Pounds 
per 
acre 
Per 
cent. 
Pounds 
!>er 
acre. 
Per 
cent. 
Pounds 
per 
acre. 
Per 
CeUt. 
Pounds 
per 
acre. 
Per 
cent. 
Pounds 
per 
acre. 
Plat 3 
Plat 4 
0. 140 
3,630 
(1.131 
3.396 
II. 114 
. 120 
.123 
. 128 
19.-, 
801 
.204 
.2111 
. 197 
.219 
. 16.1 
.215 
:.*. 956 
3. Ill 
3. 189 
3. 267 
8,088 
8,818 
5.211 
5. 1(17 
8,878 
4. 142 
8,018 
LOOM 
244 
L0O74 
192 
1. 0078 
0100 
0074 
0074 
.0547 
0434 
.0448 
.0413 
.oio:, 
.0642 
.0321 
.0560 
202 
259 
192 
192 
1.418 
1.125 
1.146 
1.071 
1,050 
1.665 
806 
1,807 
Plat LOi 
Plat 10b 
Plat 7 
Plat 13 
Plat 14 
Plat 12. 
Plat 11 
.146 
::::::: 
3. m 

. 122 
,5b 
8,22] 
3.37H 
(11(16 
275 
0088 
.0088 
176 
239 
.174 
. 1TB 
.183 
.177 
4. :.ll 
4,616 
1,744 
I 
. 199 
. 189 
.2<KI 
.184 
189 
1. 1M« » 
5. 185 
4.77(1 
.11261 
.0257 
0888 
(1259 
677 
828 
695 
672 
.0888 
.it 564 
0886 
.0329 
993 
944 
1.001 
S53 
Plat 2a 
Plat 2b 
.189 
1,886 
. 194 
1.648 
.0288 
880 
.0278 
891 
SECOND 9 INCHES OF SOIL. 
Plat 3 
Plat » 
n. HI 
3,099 
0.093 
8, HM 
0. 113 
. li 
.111 
• 128 
.088 
In:, 
Ill 
.088 
. !<>* 
. Hi7 
.1195 
.111 
3.U19 
2. K32 
2. 965 
3.286 
2.297 
2.805 
8,966 
8,618 
2. 885 
2. .>{8 
2.965 
ii 0088 
78 
8.0020 
- 
0.0041 
.0024 
.003] 
.0048 
.0038 
.0027 
.0023 
.0086 
.0028 
.0052 
.0052 
.0094 
110 
64 
83 
115 
102 
72 
61 
94 
75 
139 
139 
251 
Plat Hht 
Plat 10b 
Plat ; 
Plat 13 
Plat 1 1 
Plat 12 
Plat 11 
Plat 5 
. 128 
3.41H 
. mi 
.113 
2.698 
3.019 
.0031 
83 
.0018 
.0029 
00 1" 9 
.0016 
.0020 
.0017 
48 
75 
""a 
43 
53 
45 
'.odea 
.0024 
.0019 
.6028 
88 
64 
51 
59 
111 
.118 
.112 
. nr, 
8,988 
3. 152 
2. 998 
1,921 
.1(18 
. LOfi 
.112 
.107 
8,808 
2. 992 
2. S5X 
Plat 2a 
Plat 8b.. 
. 128 
3, 306 
.111 
8,988 
.0044 
118 
.0063 
83 
THIRD 9 INCHES OF SOIL. 
Plat 3. 
Plat 4 
0.092 
2,568 
0.090 
2,512 
inn: 
097 
2,708 
2.708 
2.931 
3. ((99 
2. ink; 
2.261 
3. 154 
2. 889 
2.54(1 
8, 126 
2.345 
2.317 
0.0012 
.U 
0.0012 
34 
0.0C21 
.0017 
.0018 
.0021 
. 0030 
.0016 
.0023 
.0020 
.0017 
.0036 
.0028 
.0034 
59 
48 
50 
59 
84 
45 
64 
56 
48 
101 
78 
95 
Plat U la 
Plat lnb 
Plat 7 
.111 
3.099 
.090 
.104 
2.512 
2. IK 13 
. 105 
.111 
H74 
.081 
.113 
.088 
.on 
.112 
.(184 
.083 
.0014 
39 
.0013 
.0012 
30 
34 
Plat 13 
Plat 14 
Plat 12. 
Plat 11 
.093 
121 
\m 
.1198 
8, 598 
3,878 
2.87:. 
2. 786 
os7 
.104 
.083 
.090 
8i 129 
8,908 
2. 429 
8,080 
.0012 
.0017 
.0014 
.0017 
:14 
48 
39 
48 
.0010 
(Mill 
.0012 
.0012 
28 
31 
34 
34 
Plat 2a 

Plat 8b. 
.103 
2, 975 
.082 
2,289 
.0015 , 42 
.0017 
48 
Seeing that these results are fully discussed in the recent paper 
presented to the Royal Society, referred to on p. Ill, we may here 
confine ourselves toa brief examination of the principal facts brought 
out l>y i he eomparal ive figures. 
