156
RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Reference: C. Sub-soil. Chun Lung.
Description: Deep yellow clay loam.
Date: 31st May, 1929.
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”
1.17
98.83
Size of particles
in mm.
Fractions dried at 105°C.
Fractions
ignited
per cent.
Coarse sand
2-0 to 0-2
14.99
per cent
14.72
Fine sand ...
0-2 to 0-02
9.78
9.39
Silt
0-02 to 0·002
...
18.25
17.23
Clay
0-002 and under
49.70
43.40
Moisture at 105°C
7.33
7.33
Matter soluble in water
0.014
0.014
Loss by solution in HC1
0.31
0.31
Calcium carbonate
nil.
nil.
Loss on ignition *
8.81
Total
100.37
101.20
* Not including moisture at 105°C. or CO, from carbonates.
Containing sulphates equivalent to sulphuric anhydride (SO,)
Containing chlorides equivalent to chlorine (C1)...
Reaction of soil: Strongly acid
0.004 per cent.
0.004 per cent.
pH value 4.89
(Quinhydrone method).