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cation exchange capacity(4)
adsorption(2)
agricultural soil science(2)
chemical equilibrium(2)
functional groups(2)
isotherms(2)
pyrolysis(2)
clay mineralogy(1)
cloning(1)
dna extraction(1)
electrostatics(1)
fertilizers(1)
loess(1)
methylene blue(1)
nitrification(1)
polymerase chain reaction(1)
regression analysis(1)
ribosomal rna(1)
rice(1)
scanning electron microscopy(1)
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