Dehydration in Laterite Formation ■ — ShermaN et al. 
441 
TABLE 1 
A Comparison of the Bulk Density and Particle Density of Different Soil Horizons in Barren 
' Laterite Crust Areas with Adjacent Areas Having a Vegetative Cover 
BARREN SOILS (CRUST) 
vegetative COVER (no crust) 
location 
DEPTH 
BULK 
DENSITY 
particle 
DENSITY 
location 
DEPTH 
BULK 
DENSITY 
PARTICLE 
DENSITY 
Laterite crust 
Waimea Canyon 
Site A 
Inches 
0- 7 
2.0 
3.84 
Waimea Canyon 
Site C near 
sites A and B 
Inches 
0- 5 
0.8 
2.86 
Laterite crust 
Waimea Canyon 
Site A— friable layer 
7-14 
1.1 
2.71 
Waimea Canyon 
Site C near 
sites A and B 
5-10 
0.9 
2.99 
Laterite crust 
Waimea Canyon 
Site B 
0- 7 
2.2 
4.43 , 
Waimea Canyon 
Site C near 
sites A and B 
10-15 
0.9 
2.82 
Laterite crust 
Waimea Canyon 
Site B-— friable layer 
7-14 
0.8 
2.21 
Waimea Canyon 
Site C near 
sites A and B 
15-20 
1.0 
2.91 
Laterite crust 
Lower Waimea Canyon 
Irrigation ditch bank 
Site E 
0- 5 
1.9 
3.98 
Laterite crust 
Lower Waimea Canyon 
■ Irrigation ditch bank 
Site E 
5-10 
2.1 
4.16 
Waimea Canyon 
Site D above 
site C 
Matted 
roots 
on 
surface 
0.9 
2.75 
Laterite crust 
Lower Waimea Canyon 
Irrigation ditch bank 
Site E 
10-15 
2.1 
4.25 
Waimea Canyon 
Site D above 
site C 
0- 5 
0.9 
3.24 
Hardened soil 
Lower Waimea Canyon 
Irrigation ditch bank 
0- 5 
1.4 
4.00 
Waimea Canyon 
Site D above 
site C 
5-10 
0.9 
3.21 
Hardened soil 
Lower Waimea Canyon 
Irrigation ditch bank 
5-10 
1.3 
3.81 
Waimea Canyon 
Site D above 
site C 
10-15 
1.0 
3.34 
Hardened soil 
Lower Waimea Canyon 
Irrigation ditch bank 
10-15 
1.3 
3.79 
Loose clod 
Irrigation ditch bottom 
2.5 
4.14 
Chemical Composition: The soil samples from 
the two profiles shown in Figure 1 were ana- 
lyzed for major oxide constituents, and the 
data obtained are given in Table 3. A marked 
difference was found in the amounts of cer- 
tain constituents and also in the weight loss 
on ignition. The soil of the surface horizon 
from the area having a vegetative cover showed 
a loss of weight amounting to 28 per cent on 
ignition, whereas the soil from the same ho- 
rizon of the barren profile lost a little over 2 
per cent. The same data from the 10-1 5 -inch 
