146
RESULTS OF THE EXAMINATION OF SOIL. FROM HONG KONG.
Imperial Institute No. M.3283.
Date: 31st May, 1929.
Reference: A. Top-soil. So Kwun Wat; Cultivated; first-class padi crops recently grown
on area.
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'
8.25
91.75
Size of particles in mm.
Fractions dried at 105°C.
Fractions ignited.
per cent.
per cent.
Coarse sand
2-0 to 0-2...
44.07
44.04
Fine sand..
0-2 to 0·02
26.05
25.75
Silt
0-02 to 0·002
12.70
11.90
Clay
0-002 and under
14.18
12.33
Moisture at 105°C.
1.16
1.16
Matter' soluble in water
0.026
0.026
Loss by solution in HC1
0.25
0.25
Calcium carbonate
nil.
nil.
Loss on ignition
*
3.68
Total
98.44
99.14
*Not including moisture at 105°C. or CO, from carbonates.
(Containing sulphates equivalent to sulphuric anhydride (SO)
Containing chlorides equivalent to chlorine (C1)...
0.017 per cent.
0.003 per cent.
Reaction of soil: Strongly acid
pH value 4.73
(Quinhydrone method).