Fig. 3From: Variations in the quantity and chemical composition of soil dissolved organic matter along a chronosequence of wolfberry plantations in an arid area of Northwest ChinaUV254 (A), SUVA254 (B), E2/E3 (C), and E3/E4 (D) of soil DOM under the corn field and five wolfberry plantations with different ages. Different lower-case letters indicate significant differences between the wolfberry planting ages (P < 0.05)Back to article page