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RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: G. Sub-soil. Shek Kwu Lung; Uncultivated; pine and wild trees, ferns and
grass growing on area.
Description: Brownish-yellow loam.
RESULTS OF EXAMINATION.
Preliminary mechanical analysis on the entire soil, which was air-dried before examination.
Size of particles in mm.
Per cent.
Stones and gravel
Over 2·0
"Fine earth'
Under 2.0
Mechanical analysis of "Fine earth"
5.92
94.08
Size of particles in mm.
Fractions dried at 105°C.
Fractions
ignited
per cent.
per cent.
Coarse sand
2·0 to 0.2
18.75
18.32
Fine sand ...
0-2 to 0-02
25.38
24.99
Silt
0-02 to 0-002
30.07
27.43
Clay
0.002 and under
21.48
17.75
Moisture at 105°C
Matter soluble in water ‡
Loss by solution in HC1
Calcium carbonate
Loss on ignition *
Total
:
:
3.44
3.44
0.011
0.011
0.35
0.35
nil.
nil.
7.24
99.48
99.53
* Not including moisture at 105°C. or CO, from carbonates.
(Containing sulphates equivalent to sulphuric anhydride (50) 0.009 per cent.
Containing chlorides equivalent to chlorine (C1)...
0.002 per cent.
Reaction of soil: Acid ...... pH value 5.06 ...... (Quinhydrone method).
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