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RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: H. Top-soil; Tai Pak, Lantao; Uncultivated; pine and wild trees, ferns and
grass growing on area.
Description: Yellowish-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
Mechanical analysis of "Fine earth"
10.08
89.92
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
46.85
46.38
18.96
18.49
Silt
0-02 to 0·002
9.80
7.65
Clay
0-002 and under
19.23
18.58
Moisture at 105°C
Matter soluble in water
Loss by solution in HCT
Calcium carbonate
Loss on ignition *
Total
...
:
4.98
4.98
0.022.
0.022
0.32
0.32
nil.
nil.
3.51
100.16.
99.93
* Not including moisture at 105°C. or CO2 from carbonates.
2
(Containing sulphates equivalent to sulphuric anhydride (SO)
(Containing chlorides equivalent to chlorine (C1)...
Reaction of soil: Very strongly acid
0.008 per cent.
0.003 per cent.
pH value 4.45 ...... (Quinhydrone method).