...Return to Andisols...

Table 4: Change in Calcium, Magnesium, Potassium and Sodium Contents (centimoles of charge per kilogram of soil) with rainfall.

"SUM" refers to the sum of bases. Note that in the Hilo soil pH remains relatively high even when the sum of bases is very low.

Waikoloa Series

30-40" Annual Rainfall

Paahau Series

60-80" Annual Rainfall

Hilo Series

175-200" Annual Rainfall

depth

(cm)

Ca

Mg

K

Na

SUM

pH

depth

(cm)

Ca

Mg

K

Na

SUM

pH

depth

(cm)

Ca

Mg

K

Na

SUM

pH

0-13 27.9 7.8 4.80 0.40 40.9 6.6 0-25 14.8 4.5 0.28 0.42 20.0 5.8 0-38 2.6 2.2 0.2 Tr. 5.0 5.4
13-25 28.0 6.4 5.60 0.40 40.4 7.1 25-45 9.9 3.5 0.10 0.44 13.9 6.4 38-48 1.4 0.3 0.1 0.1 -- 5.9
25-50 32.6 7.1 4.80 0.80 45.3 7.3 45-70 7.2 3.3 0.09 0.28 10.9 6.4 48-50 0.9 0.1 0.1 Tr. -- 6.0
50-63 34.6 9.8 3.00 1.10 48.5 7.5 70-85 4.9 2.2 0.08 0.24 7.4 6.3 50-58 0.9 0.1 Tr. 0.1 -- 5.9
63-78 33.3 12.8 0.60 1.60 47.7 7.6 85-118 4.2 1.7 0.10 0.25 6.3 6.5 58-80 1.8 0.3 Tr. 0.1 -- 6.1
78-98 33.0 15.9 0.30 2.20 49.2 7.8 118-

143

4.6 1.6 0.09 0.27 6.6 6.5 80-85 1.5 0.1 Tr. Tr. -- 6.4
98-125 34.0 12.4 0.50 5.40 52.3 8.l 143 4.7 1.4 0.02 0.19 6.3 -- 85-100 1.4 0.1 Tr. Tr. -- 6.2
125-

163

33.3 14.4 1.30 6.10 55. 8.2 100-133 0.6 0.1 Tr. Tr. -- 6.2
133-

153

1.6 0.1 Tr. 0.1 -- 6.1


...Return to Andisols...