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RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: H. Sub-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.
Stones and gravel ... Over 2.0
"Fine earth"
Coarse sand
Fine sand...
Silt
Clay
:
:
:.
:
Under 2.0
Mechanical analysis of "Fine earth”
Per cent.
11.25
88.75
Size of particles
in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
per cent.
2-0 to 0.2
41.74
41.54
0-2 to 0·02
17.51
17.11
0-02 to 0-002
10.45
10.50
0.002 and under
23.48
20.20
Moisture at 105°C
Matter soluble in water
Loss by solution in HC1
Calcium carbonate
Loss on ignition *
•
•
Total
:
:
:.
:..
6.24
6.24
0.015
0.015
0.27
0.27
nil.
nil.
3.81
99.71
99.69
* Not including moisture at 105°C. or CO, from carbonates.
(Containing sulphates equivalent to sulphuric anhydride (SO,) (Containing chlorides equivalent to chlorine (C1)....
0.007 per cent.
0.003 per cent.
Reaction of soil: Strongly acid
pH value 4.64
(Quinhydrone method).