Fig. 1From: Molecular changes of ferric oxide bound soil humus during the decomposition of maize strawThe yield of Fe/Al-OC extracted from soils without incubation (a) and soils incubated for 30, 90, and 180 days (b); TP Tai-Lake plain soil; RP red earth paddy soil; PP purple paddy soil; MS marsh soil; In figure b the results are mean ± SD (n = 3)Back to article page