170
RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: G. Top-soil; Shek Kwu Lung; Uncultivated; pine and wild trees, ferns and grass
growing on area.
Description: Yellowish-brown loam.
RESULTS OF EXAMINATION.
Preliminary mechanical analysis on the entire soil, which was air-dried before examination.
Size of particles
in mm.
Stones and gravel
Over 2·0
"Fine earth"
Under 20
Mechanical analysis of "Fine earth"
Per cent.
7.80
92.20
Size of particles in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
per cent.
Coarse sand
Fine sand...
2·0 to 0·2 ...
0-2 to 0·02
21.93
21.31
25.57
25.09
Silt
0-02 to 0·002
32.55
29.38
Clay
0.002 and under
14.08
11.65
Moisture at 105°C
Matter soluble in water
Loss by solution in HC1
Calcium carbonate
Loss on ignition
*
Total
:
3.52
3.52
0.023
0.023
0.64
0.64
nil.
nil.
9.09
98.31
100.70
* Not including moisture at 105°C. or CO, from carbonates.
2
(Containing sulphates equivalent to sulphuric anhydride (SO3) 0.012 per cent.
#
[Containing chlorides equivalent to chlorine (C1)...
0.003 per cent.
Reaction of soil: Very strongly acid
H value 4.46
(Quinhydrone method).
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