Chemical composition of the soils. 
Constituents. 
Soil 
Soil 
Soil 
Soil 
Soil 
Soil 
Soil 
Soil 
No. 104. 
No. 291. 
No. 292. 
No. 339. 
No. 392. 
No. 428. 
No. 448. 
No. 474. 
Per ct. 
Pit ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
1.22 
9. 33 
7.65 
8.90 
5. 51 
14.94 
L6.00 
13.59 
48.11 
41.21 
38.49 
33.75 
29. (14 
34.99 
15. 10 
33.77 
37.47 
15.89 
16.63 
22. 69 
15. 72 
8.24 
19.20 
7.00 
3.05 
15.39 
12. 85 
11.60 
24. 78 
10.73 
lti. 64 
16. 79 
1.72 
1.25 
2.00 
2.66 
1.80 
3.20 
4.20 
1.80 
.10 
.18 
.24 
.07 
2.26 
.20 
.0(1 
.07 
.12 
.67 
1.84 
.39 
.52 
1.91 
.50 
3.80 
1.22 
1.41 
8.47 
.24 
.50 
2.24 
1.80 
.85 
.48 
.17 
.39 
.13 
.40 
.24 
.15 
.72 
1.46 
.40 
1.36 
.40 
.21 
1.40 
.68 
.10 
.07 
.20 
.57 
.26 
.28 
.22 
.29 
2.78 
.44 
.09 
.08 
.18 
.31 
.45 
.53 
. 45 
3.56 
12.77 
8.42 
19.15 
19.00 
22. 24 
25.58 
20.01 
Soil 
No. 547. 
Moisture 
Insoluble matter 
Ferric oxid ( Fe2C>3) 
Alumina ( A1 2 3 ) 
Titanic oxid ( Ti0 2 ) 
Manganese oxid (M113O4) 
Lime(CaO) 
Magnesia (MgO) 
Potash(K 2 0) 
Soda(Na 2 0) 
Phosphorus pentoxid (P2O5) . 
Sulphur trioxid (S0 3 ) 
Volatile matter 
Per ct. 
3.12 
34. 54 
30.84 
10.68 
6.20 
.40 
1.25 
.19 
.13 
.43 
.10 
12.20 
The above analyses were made by extraction with hydrochloric 
acid. On fusion with sodium carbonate the analysis of soil No. 164 
gave 18.9 per cent titanic oxid. 
Soil No. 164 is a peculiar, fine-grained, gray, silty soil, evidently of 
residual formation. It has an unusually high specific gravity (2.8) 
and resembles more a mineral deposit than a soil. 
Soil No. 291 is very unlike the normal clay soils of the islands. It 
is brown in color and is very similar in physical properties to the 
adobe soils of the mainland. Drainage is very poor and plowing 
difficult, and when the soil dries it becomes almost as hard as cement. 
It is probably a transported soil, as it occurs in the valleys or gulches 
extending back into the mountains. 
No. 292 is a sandy soil formed from the disintegration and decom- 
position of volcanic ash. It is highly productive, owing to its excel- 
lent physical and chemical composition. 
No. 339, a silty soil from windward Oahu, is very productive and 
is devoted primarily to rice culture. 
No. 392 is representative of the types of red silty soils found in 
the islands. 
No. 428, a sandy soil from the Olaa district of Hawaii, has been 
formed from the disintegration of lava under very humid conditions, 
and hence is very high in organic matter. 
No. 448 represents a yellow clay silt found more or less widely dis- 
tributed throughout the islands. It contains a notably high content 
of combined moisture. 
Xo. 474 is a highly organic sandy silt from the Waimea district of 
Hawaii. It has an extremely loose structure, making it very dusty, 
but it is highly productive. 
No. 547 was chosen as representing the brown clay silts of the 
islands and as belonging to the class of clays in which the iron con- 
tent is greater than the alumina. There is another class in which the 
alumina predominates. 
