Page 157 - Ilmu Tanah
P. 157
144 The Chemistry and Fertility of Soils under Tropical Weeds
O
-1/2 -1/2 Acid
2
O -1/2 O H
-1/2 Fe
3+
-1/2
-1/2 -1/2 Alkaline
O -1/2 O H
O
The surface of Hematit
Fig. 8.5. The development of negative charges of oxides of Hematite (Fe 2 O 3 )
(Bohn et al., 1985; Salam, 2017).
OH
CEC
-
O
Increasing pH Increasing pH
Fig. 8.6. The development of negative charges of organic matters origin with
phenolic functional groups (Salam, 2017).
Abdul Kadir Salam and Nanik Sriyani – 2019
