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RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference E. Top-soil. Kuei Island; Cultivated; green vegetables in good condition
growing on area.
Description: Greyish sandy loam.
RESULTS OF EXAMINATION.
Preliminary mechaniçal 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 2.0
Mechanical analysis of "Fine earth"
Per cent.
12.27
87.73
Size of particles in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
per cent.
Coarse sand
2-0 to 0.2 ...
25.09
24.45
Fine sand...
0-2 to 0-02
21.85
21.29
Silt
0-02 to 0·002
30.97
29.50
Clay
0-002 and under
18.13
15.33
Moisture at 105°C
Matter soluble in water...
:
Loss by solution in HC1
Calcium carbonate
:.
Loss on ignition
***
3.80
3.80
0.058
0.058
0.62
0.62
0.11
0.11
5.15
Total
*Not including moisture at 105°C. or CO2 from carbonates.
100.63
100.31
(Containing sulphates equivalent to sulphuric anhydride (SO,) 0.020 per cent.
(Containing chlorides equivalent to chlorine (C1)...
Reaction of soil: Faintly alkaline ...... pH value 7.57
0.015 per cent.
(Quinhydrone method).
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