Nk. Savant, SIMPLIFIED METHYLENE-BLUE METHOD FOR RAPID-DETERMINATION OF CATION-EXCHANGE CAPACITY OF MINERAL SOILS, Communications in soil science and plant analysis, 25(19-20), 1994, pp. 3357-3364
Rapid determination of cation exchange capacity (CEC) of soils can be
useful for soil testing to improve efficiency of fertilizer use. The m
ethylene blue (MB) method of Wang et al. (1989) has been simplified fo
r rapid determination of CEC of mineral soils in field. For the temper
ature and tropical soils used, the relationships between the CEC by th
e ammonium acetate (NH4OAc) method and the simplified MB method were l
inear (r2 = 0.97) with a slope ranging from 0.84 to 1.02. These result
s suggest that the simplified MB method has the potential for a rapid
determination of the CEC of mineral soils.