The increase in KOC on HF-treatment varied widely, and consequently the correlation between KOC of the whole soils and their isolated organic matter (HF-treated residues) is poor (Fig. 1).
The increase in KOC on HF-treatment varied widely, and consequentlythe correlation between KOC of the whole soils and theirisolated organic matter (HF-treated residues) is poor (Fig. 1).