THE HOOS FIELD BARLEY BOILS. 
147 
Table 79,—Hoos field barley soils, samples collected Frbruary-March, 1889— 
Nitrogen in first 9 inches of soil, stated as percentage* of fine dry soU and tu 
ixmndi per acre; also differences between plats of section O, and those of other 
'lions. 
Section. 
Plat. 
Nitrogen. 
Nitrogen per acre. 
Per cent. 
+ or — 
section 
O. 
Actual. 
+ or - 
section 
O. 
i i 
1 4 
0.1030 
.0807 
(070 
' 1124 
Poumis. 
2.351 
2.26N 
2 J") - ' 
8,841 
Pounds. 
A (ammonium salts ) 
1! 
JOOO 
.1030 
.1040 
. MM 
-0.0080 
f .mm 
+ mo 
2.275 
2. 678 
2. 888 
2, 771 
- 76 
+310 
+ 177 
— 70 
+37«.» 
+ 4.->7 
+:{.->!> 
-16U 
AA (sodium nitrate | 
1 
9 
a 
4 
. loxo 
. 1078 
.1111 
. 1057 
+ 0150 
+ .0181 
• 0148 
ooiiT 
2~73<7 
2. 726 
8,811 
8,678 
A AS i. sodium nitrate, and sodium sdn-atei 
1 » 
i i 
. 1042 
. 1135 
Lisa 
UK) 
+ .0112 
+ .0238 
01KS 
Him 
2.634 
2. H«i!l 
2. B64 
2. 
+283 
+H01 
+412 
—255 
C < rape cako) 
r l 
i 
3 
4 
. i-su 
»7 
. 1330 
.1308 
. am 
■ (H10 
• mn) 
• .01S2 
2.1M4 
2.S50 
3.141 
3. 0.«* I 
+563 
+582 
+»>8!> 
+243 
It will be seen tflial in every section plal l (with Fall minerals and 
nitrogen) seems to contradicl all the teaching of the other plats by 
its lowness ill comparison with plat <)4, also receiving full minerals, 
hut without nitrogen. This apparent, anomaly is due to the legumi- 
nous weed vegetation on the Last-named plal. already fully discussed. 
Excluding plats 1, we find, as in the case of the wheat soils, that the 
accumulations of crop residue under manuring and higher cropping 
have produced or maintained in the surface soil of the various sec- 
tions a greater quant ity of nitrogen than we find on section (), without 
nitrogenous manures, except in one Case, viz, that of the continuous 
application of ammonium salts without minerals. This has left the 
soil slightly poorer in nitrogen, if anything, than has the absolute 
an manuring on plal 01, showing once more that even if largely 
unut ilized through lack of phosphates and other mineral constituents,' 
ammonium salts do not accumulate, even in clay soil, in such a 
degree as to appreciably affect the permanent proportion of total 
fixed nit rogen. 
On the corresponding sodium nitrate plats, on the other hand, we 
find an accumulation or increase of nitrogen; but this again is not 
accumulation of manure but of crop residue, due to the persistently 
larger yield of both grain and straw under the influence of the nitrate 
when minerals are not applied. 
