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RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: D. Top-soil. Chung Uk Chun, Tin Shum, Castle Peak; Uncultivated; large
wild trees, bamboo, ferns and grass growing on area.
Description: Grey sandy 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
Coarse sand
Fine sand...
Silt
Clay
:
Mechanical analysis of "Fine earth"
5.84
94.16
Size of particles
in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
per cent.
2.0 to 0.2 ...
43.64
43.48
0·2 to 0·02
32.27
32.16
0-02 to 0·002
10.65
10.30
0.002 and under
10.58
9.10
Moisture at 105°C
Matter soluble in water .
Loss by solution in HC1
Calcium carbonate
Loss on ignition
Total
:
:
:
1.49
1.49
0.042
0.042
0.53
0.53
nil.
nil.
3.26
99.20
100.36
* Not including moisture at 105°C. or CO2 from carbonates.
(Containing sulphates equivalent to sulphuric anhydride (SO) 0.010 per cent.
Containing chlorides equivalent to chlorine (C1)...
0.006 per cent.
Reaction of soil: Strongly acid ...... pH value 4.97 ...... (Quinhydrone method).
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