160
RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: D. Sub-soil. Chung Uk Chun.
Description: Greyish 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"
9.92
90.08
Size of particles
in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
per cent.
+
Coarse sand
2.0 to 0.2...
37.25
37.21
Fine sand
0·2 to 0-02
29.45
29.30
Silt
0·02 to 0·002
13.42
13.60
Clay
0.002 and under
17.98
15.58
Moisture at 105°C
1.63
· 1.63
Matter soluble in water
0.040
0.040
Loss by solution in HC1
0.38
0.38
Calcium carbonate
nil.
nil.
Loss on ignition
*
2.98
Total
100.15
100.72
* Not including moisture at 105°C. or CO, from carbonates.
(Containing sulphates equivalent to sulphuric anhydride (SO) 0.008 per cent.
[Containing chlorides equivalent to chlorine (C1)...
Reaction of soil: Acid pH value 5.97
..
0.003 per cent.
(Quinhydrone method).