154
RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: C. Top-soil. Chun Lung; Uncultivated; pine and wild trees, ferns and grass
growing on area.
Description: Yellow clay loam.
RESULTS OF EXAMINATION.
Preliminary mechanical analysis on the entire soil, which was air-dried before examination.
Size of particles
in mım.
Stones and gravel
Over 2.0
"Fine earth"
Under 2.0
Mechanical analysis of "Fine earth"
Per cent.
0.29
99.71
Size of particles in mm.
Fractions dried at 105°C
Fractions
ignited
per cent.
per cent.
Coarse sand
2·0 to 0·2
18.26
17.80
Fine sand ...
0·2 to 0·02
11.12
10.80
Silt
0·02 to 0·002
19.35
16.72
Clay
0.002 and under
43.90
37.38
Moisture at.105°C
7.15
7.15
Matter soluble in water
0.016
0.016
Loss by solution in HC1
0.55
0.55
Calcium carbonate
nil.
nil.
Loss on ignition
*
9.78
Total
100.35
100.26
* Not including moisture at 105°C. or CO, from carbonates.
(Containing sulphates equivalent to sulphuric anhydride (SO) 0.007 per cent.
[Containing chlorides equivalent to chlorine (C1)...
Reaction of soil: Strongly acid
0.005 per cent.
pH value 4.67 ...... (Quinhydrone method).
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