Articles | Volume 9, issue 2
https://doi.org/10.5194/soil-9-443-2023
https://doi.org/10.5194/soil-9-443-2023
Original research article
 | 
31 Jul 2023
Original research article |  | 31 Jul 2023

Tropical Andosol organic carbon quality and degradability in relation to soil geochemistry as affected by land use

Sastrika Anindita, Peter Finke, and Steven Sleutel

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Cited articles

Anda, M. and Dahlgren, R. A.: Long-term response of tropical Andisol properties to conversion from rainforest to agriculture, Catena, 194, 104679, https://doi.org/10.1016/j.catena.2020.104679, 2020. 
Anindita, S., Sleutel, S., Vandenberghe, D., Grave, J. De, Vandenhende, V., and Finke, P.: Land use impacts on weathering, soil properties, and carbon storage in wet Andosols, Indonesia, Geoderma, 423, 115963, https://doi.org/10.1016/j.geoderma.2022.115963, 2022. 
Asano, M. and Wagai, R.: Evidence of aggregate hierarchy at micro- to submicron scales in an allophanic andisol, Geoderma, 216, 62–74, https://doi.org/10.1016/j.geoderma.2013.10.005, 2014. 
Asano, M. and Wagai, R.: Distinctive organic matter pools among particle-size fractions detected by solid-state 13C-NMR, δ13C and δ15N analyses only after strong dispersion in an allophanic andisol, Soil Sci. Plant Nutr., 61, 242–248, https://doi.org/10.1080/00380768.2014.982492, 2015. 
Asano, M., Wagai, R., Yamaguchi, N., Takeichi, Y., Maeda, M., Suga, H., and Takahashi, Y.: In search of a binding agent: Nano-scale evidence of preferential carbon associations with poorly-crystalline mineral phases in physically-stable, clay-sized Aggregates, Soil Syst., 2, 32, https://doi.org/10.3390/soilsystems2020032, 2018. 
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This study investigated how land use, through its impact on soil geochemistry, might indirectly control soil organic carbon (SOC) content in tropical volcanic soils in Indonesia. We analyzed SOC fractions, substrate-specific mineralization, and net priming of SOC. Our results indicated that the enhanced formation of aluminum (hydr)oxides promoted aggregation and physical occlusion of OC, which is consistent with the lesser degradability of SOC in agricultural soils.
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