165 
bracken. Both soils are typical sour, moorish soils, and the 
results of their partial analysis are shown in Table III. 
TABLE III.—Partiat ANALYSIS OF SoILs. 
“ce fe ge “ce Bi. 
ahermeeEd Wood between 
: Blue are 
West Woods. | R¥ield an 
Chapel Park. 
| 
Per vent. Per cent. 
Loss on Ignition aie ete. ) - 42-65 26-85 
Total Nitrogen’ - - 55 57 
Nitrogen as Ni pel & - - absent absent 
Nitrogen as Ammon: - -001 -001 
Lime  Baguiremont 6 as 5 CaCO, - - 1-53 1-30 
The soil from “A” was nearly free from stones and —, 
The coarse materials which failed to pass a sieve with round 
holes 1 millimetre in diameter were less than 2 per cent. age 
the ae hand, the soil from “‘B” was stoney, and almost 
29 per cent. of the sample consisted of stones and gravel which 
failed to pass the 1 mm. sieve. The determinations shown in 
Table III. were made in the fine earth which passed this sieve. 
Both soils were found to be very sour. By Truog’s test, both 
gave an acidity comparable to that of a pure peat, but “A” 
was found to be distinctly more acid than “ B.”’ On the other 
hand, the determination of “‘ Lime Requirement ”’ by Hutchinson 
& Maclennans* method (see Table III.) shows that it requires 
more Carbonate of Lime to neutralise ‘““B” than “ A,” but it 
also shows that both are very sour soils. An ordinary soil will 
weigh, dry, approximately 1,000 tons per acre to a depth of 
9 in., and for a soil of this weight the figures mean that it would 
require 15-3 tons of Carbonate of Lime to neutralise “‘ A’ and 
13-0 tons to neutralise “‘ B.”’ Such quantities are never applied 
now-a-days in agricultural practice, but, on the other hand, such 
moorish soils as these weigh light, and would not have a dry 
weight of 1,000 tons per acre 9 in. deep. Little information is 
to be gained from the figures for total Nitrogen, as both soils 
contain almost the same perceniae’s and that much what might 
be expected from soils of this class 
Finally there is the difference in situation of the two places. 
Me a ’’ is on an open hillside from which the trees were removed 
e time ago, and it is therefore exposed and free from shade. 
« "B ” on the other hand is a well sheltered hollow, where the 
Bracken is both sheltered from wind and shaded by trees. In 
* Journal of Agricultural Science, 1915, vii. pp. 75-105. 
