Economic and Environmental Geology

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Fig. 8.

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Fig. 8. Variation in the concentrations of (a) total-nitrogen (T-N), (b) nitrate-nitrogen (NO3-N), and (c) ammonia-nitrogen (NH4-N) within soil during the period of artificial injection of carbon dioxide. I: initial, PV: pore volumes, 5C: 5 pore volumes in the control tests with no injection of carbon dioxide, NCS: non-cultivated soil, MCS: maize-cultivated soil, and SCS: soybean-cultivated soil.
Econ. Environ. Geol. 2021;54:409-25 https://doi.org/10.9719/EEG.2021.54.4.409
© 2021 Econ. Environ. Geol.