166
RESULTS OF THE EXAMINATION OF SOIL FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: F. Top-soil. Tai Long Wan, Lo Kong; Shek O; Cultivated; fair crop of padi
growing on area.
Description: Pinkish brown 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'’
Under 2.0
Mechanical analysis of "Fine earth".
Per cent.
18.88
$1.12
Size of particles in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
Coarse sand
2·0 to 0·2
21.70
per cent.
21.32
Fine sand...
0-2 to 0-02
21.44
20.95
Silt
0-02 to 0-002
33.10
32.30
Clay
0.002 and under
19.55
17.35
Moisture at 105°C
...
Matter soluble in water
Loss by solution in HC1
Calcium carbonate
Loss on ignition
*
Total
:
3.50
3.50
0.044
0.044
0.33
0.33
nil.
nil.
4.20
99.66
99.99
*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)...
0.010 per cent.
Reaction of soil: Acid pH value 5.19 ...... (Quinhydrone method).
No comments yet.
Private notes are available after approval.