| Management | Dominant organic acids | Ratio aliphatic/cyclic plus aromatic acids | Concentrations | Sampling | Increase/decrease with depth | References |
| Pinus sylvestris L., Quercus robur L., Picea abies (L.) H. Karst., Betula pendula Roth., Fagus sylvatica L., and Abies alba Mill. | Citric, acetic, formic, oxalic, malic, butyric, propionic, malonic, lactic, tartaric, succinic, shikimic, and propionic acid |
4–157 | Up to 5820 μM* | Whole profile | Mostly decrease, sometimes increase with depth | [6, 20–22, 36–41] |
| Lupinus polyphyllus Lindl., Agropyron repens L., Juncus effusus L., Juncus inflexus L., and Juncus articulatus L. | Citric, acetic, formic, lactic, and oxalic acid | 4–10 | Up to 1 μmol/g soil | A-horizon | — | [23, 42, 43] |
| Contaminated soils (industrial, agricultural) | Oxalic acid | — | Up to 3 μmol/g soil | — | — | [44] |
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