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Chemical and Biological Technologies in Agriculture
Fig. 8 | Chemical and Biological Technologies in Agriculture

Fig. 8

From: Variations in the quantity and chemical composition of soil dissolved organic matter along a chronosequence of wolfberry plantations in an arid area of Northwest China

Fig. 8

Heatmap of the correlation between soil properties, fluorescence components, and indices. SOM soil organic matter, DOM dissolved organic matter, AP available phosphorus, TN total nitrogen, C/N carbon/nitrogen ratio, ExK exchangeable potassium; ExNa exchangeable sodium; ExCa exchangeable calcium, ExMg exchangeable magnesium, TEB soil total exchangeable bases, FI fluorescence index, BIX autogenetic index; HIX: humification index, C1 protein-like component, C2 mixture of protein and fulvic acid-like components, C3 fulvic acid-like component. * indicates significant correlations at the 0.05 level

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