510 Philippine Journal of Science lais 
Table VII. — Ceylon soils. 
Cabooky 
soil. 
Alluvial 
soil. 
Experi- 
ment 
station, 
Pera- 
deniya. 
Cacao 
land 
inter- 
planted 
with 
rubber. 
Tea land 
inter- 
planted 
with 
rubber. 
Swampy 
land, 
black 
soil. 
Moisture. 
3.300 
3.000 
3.600 
3.000 
5. 600 
Organic matter and combined water 
8. 000 
11.000 
4.600 
6. 000 
20.400 
Oxide of iron and manganese - 
7. 400 
8.000 
7.200 
5.200 
1.200 
Oxide of alumina 
8. 200 
9.717 
6. 786 
13. 049 
5.232 
Lime - -- 
0.060 
0. 130 
0. 160 
0.160 
0. 050 
Magnesia . 
0.054 
0.259 
0.216 
0.490 
0. 115 
Potash 
0.085 
0. 162 
0.077 
0.401 
0. 061 
Phosphoric acid 
0.010 
0.076 
0. 064 
0.089 
0.064 
Soda - 
0.074 
0. 188 
0.233 
0.137 
0. 182 
Sulphuric acid 
0. 008 
0.054 
0.048 
0.068 
0.048 
Chlorine . 
0.003 
0.014 
0.016 
0. 006 
0.048 
Sands and silicates . - 
72. 806 
67. 400 
77. 000 
71. 400 
67.000 
100.000 
100. 000 
100. 000 
100. 000 
100. 000 
Containing nitrogen - - 
0. 128 
0. 230 
0. 100 
0.162 
0. 448 
Equal to ammonia . . 
0. 156 
0. 280 
0. 122 
0. 195 
0.554 
Lower oxide of iron. 
trace 
much 
trace 
trace 
muph 
Acidity - . - 
much 
neutral 
fair 
much 
much 
Citric soluble potash 
0. 006 
0.013 
0.008 
0.025 
0.009 
Citric soluble phosphoric acid ... 
nil 
trace 
nil 
trace 
nil 
Fine soil passing 90 mesh 
11. 50 
53.90 
48. 00 
34.00 
69.00 
Fine soil passing 60 mesh 
9. 50 
43.00 
42.00 
25.00 
86. 00 
Medium soil passing 30 mesh . 
4.00 
3.00 
8.00 
10.00 
1.00 
Coarse sand and small stones 
75. 00 
0. 10 
2.00 
31. 00 
4.00 
100.00 
100. 00 
100. 00 
100.00 
100.00 
" From Circulars and Agr. Journ. Roy. Bot. Card. Ceylon 3 (19ft5) 67-72. 
