Properties Units Anak Krakatau Panjang Rakata Sebesi
pH H2O 5.66 6.89 6.80 6.45
pH KCl 4.63 5.63 5.60 4.97
Δ pH 1.03 1.26 1.20 1.49
Phosphorous retention % 96 96 96 69
Organic C % 0.93 1.70 2.34 1.97
N total % 0.03 0.10 0.15 0.18
C/N 35.47 19.12 18.87 15.67
CEC cmol(+)/kg 1.20 4.79 9.76 13.19
Exchangeable Ca cmol(+)/kg 0.01 1.57 3.49 3.64
Exchangeable Mg cmol(+)/kg 0.04 0.36 1.03 1.34
Exchangeable K cmol(+)/kg 0.03 0.29 0.64 0.95
Exchangeable Na cmol(+)/kg 0.36 0.53 0.59 0.75
Al-oxalate % 0.81 0.89 1.00 5.36
Fe-oxalate % 0.44 0.63 0.64 1.02
Si-oxalate % 0.22 0.20 0.19 1.45
Alo + ½ Feo % 1.03 1.20 1.32 5.87