Andriamananjara, A., Hewson, J., Razakamanarivo, H., Andrisoa,
R. H., Ranaivoson, N., Ramboatiana, N., Razafindrakoto, M.,
Ramifehiarivo, N., Razafimanantsoa, M. P., Rabeharisoa, L.,
Ramananantoandro, T., Rasolohery, A., Rabetokotany, N., and
Razafimbelo, T.: Land cover impacts on aboveground and soil
carbon stocks in Malagasy rainforest, Agr. Ecosyst. Environ.,
233, 1–15, https://doi.org/10.1016/j.agee.2016.08.030, 2016.
Aomine, S. and Wada, K.: Differential weathering of volcanic ash
and pumice resulting in the formation of hydrated halloysite,
American Mineralogist, 47, 1024–1048, 1962.
Basile-Doelsch, I., Amundson, R., Stone, W. E. E., Masiello, C. A.,
Bottero, J. Y., Colin, F., Masin, F., Borschneck, D., and Meunier, J. D.: Mineralogical control of organic carbon dynamics in
a volcanic ash soil on La Réunion, Eur. J. Soil Sci., 56, 689–703,
https://doi.org/10.1111/j.1365-2389.2005.00703.x, 2005.
www.soil-journal.net/5/315/2019/
329
Batjes, N. H.: Total carbon and nitrogen in the soils of the world,
Eur. J. Soil Sci., 65, 4–21, https://doi.org/10.1111/ejss.12115,
2014.
Beare, M. H., McNeill, S. J., Curtin, D., Parfitt, R. L., Jones,
J. S., Dodd, M. B., and Sharp, J.: Estimating the organic
carbon stabilisation capacity and saturation deficit of soils:
a New Zealand case study, Biogeochemistry, 120, 71–87,
https://doi.org/10.1007/s10533-014-9982-1, 2014.
Ben-Dor, E., Chabrillat, S., Demattê, J. A. M., Taylor, G. R., Hill,
J., Whiting, M. L., and Sommer, S.: Using Imaging Spectroscopy
to study soil properties, Remote Sens. Environ., 113, S38–S55,
https://doi.org/10.1016/j.rse.2008.09.019, 2009.
Benegas, L., Ilstedt, U., Roupsard, O., Jones, J., and Malmer, A.:
Effects of trees on infiltrability and preferential flow in two contrasting agroecosystems in Central America, Agr. Ecosyst. Environ., 183, 185–196, https://doi.org/10.1016/j.agee.2013.10.027,
2014.
Blakemore, L. C., Searle, P. L., and Daly, B. K.: Soil Bureau
Laboratory Methods: Methods for chemical analysis of soils.
New Zealand Soil Bureau Scientific Report, 10A, CSIRO, New
Zealand, 1981.
Boudot, J. P.: Relative efficiency of complexed aluminum, noncrystalline Al hydroxide, allophane and imogolite in retarding the biodegradation of citric acid, Geoderma, 52, 29–39,
https://doi.org/10.1016/0016-7061(92)90073-G, 1992.
Bounouara, Z., Chevallier, T., Balesdent, J., Toucet, J.,
Sbih, M., Bernoux, M., Belaissaoui, N., Bouneb, O., and
Bensaid, R.: Variation in soil carbon stocks with depth
along a toposequence in a sub-humid climate in North
Africa (Skikda, Algeria), J. Arid Environ., 141, 25–33,
https://doi.org/10.1016/j.jaridenv.2017.02.001, 2017.
Buurman, P., Peterse, F., and Almendros Martin, G.: Soil organic
matter chemistry in allophanic soils: a pyrolysis-GC/MS study of
a Costa Rican Andosol catena, Eur. J. Soil Sci., 58, 1330–1347,
https://doi.org/10.1111/j.1365-2389.2007.00925.x, 2007.
Cambou, A., Cardinael, R., Kouakoua, E., Villeneuve, M., Durand, C., and Barthès, B. G.: Prediction of soil organic carbon stock using visible and near infrared reflectance spectroscopy (VNIRS) in the field, Geoderma, 261, 151–159,
https://doi.org/10.1016/j.geoderma.2015.07.007, 2016.
Cardinael, R., Chevallier, T., Barthès, B., Saby, N., Parent, T., Dupraz, C., Bernoux, M., and Chenu, C.: Impact
of alley cropping agroforestry on stocks, forms and spatial distribution of soil organic carbon – A case study
in a Mediterranean context, Geoderma, 259–260, 288–299,
https://doi.org/10.1016/j.geoderma.2015.06.015, 2015.
CENIGA: Hojas Topográficas Escala 1 : 25 000, Proyecto TERRA,
available at: http://ceniga.sinac.go.cr/geonetwork/srv/eng/main.
home (last access: 31 October 2019), 1998.
Chang, C. W., Laird, D. A., Mausbach, M. J., and Hurburgh, C. R.:
Near-Infrared Reflectance Spectroscopy–Principal Components
Regression Analyses of Soil Properties, soil Sci. Soc. Am. J., 65,
480–490, https://doi.org/10.2136/sssaj2001.652480x, 2001.
Charbonnier, F., Roupsard, O., le Maire, G., Guillemot, J.,
Casanoves, F., Lacointe, A., Vaast, P., Allinne, C., Audebert,
L., Cambou, A., Clement-Vidal, A., Defrenet, E., Duursma,
R. A., Jarri, L., Jourdan, C., Khac, E., Leandro, P., Medlyn, B. E., Saint-Andre, L., Thaler, P., Van den Meersche, K.,
Aguilar, A. B., Lehner, P., and Dreyer, E.: Increased light-use
SOIL, 5, 315–332, 2019
330
T. Chevallier et al.: SRO minerals as powerful factors explaining deep SOC stock distribution
efficiency sustains net primary productivity of shaded coffee
plants in agroforestry system, Plant Cell Environ. 40, 1592–1608,
https://doi.org/10.1111/pce.12964, 2017.
Chevallier, T., Voltz, M., Blanchart, E., Chotte, J. L., Eschenbrenner, V., Mahieu, M., and Albrecht, A.: Spatial and temporal changes of soil C after establishment of a pasture on a
long-term cultivated vertisol (Martinique), Geoderma, 94, 43–58,
https://doi.org/10.1016/S0016-7061(99)00064-6, 2000.
Chevallier, T., Woignier, T., Toucet, J., and Blanchart,
E.: Organic carbon stabilization in the fractal pore
structure of Andosols, Geoderma, 159, 182–188,
https://doi.org/10.1016/j.geoderma.2010.07.010, 2010.
Chevallier, T., Fujisaki, K., Roupsard, O., Guidat, F., Kinoshita,
R., De Melo Viginio Fihlo, E., Lehner, P., and Albrecht,
A.: Soil carbon content, bulk densities, allophane and MIRS
data on Aquiares Watershed (Costa Rica), DataSuds, V1,
https://doi.org/10.23708/RKOTNR, 2019.
Churchman, J., Pasbakhsh, P., Lowe, D. J., and Theng, B. K. G.:
Unique but diverse: some observations on the formation, structure, and morphology of halloysite, Clays Minerals, 51, 395–416,
https://doi.org/10.1180/claymin.2016.051.3.14, 2016.
Clairotte, M., Grinand, C., Kouakoua, E., Thébault, A., Saby,
N., Bernoux, M., and Barthès, B. G.: National calibration of soil organic carbon concentration using diffuse
infrared reflectance spectroscopy, Geoderma, 276, 41–52,
https://doi.org/10.1016/j.geoderma.2016.04.021, 2016.
Costa Junior, C., Corbeels, M., Bernoux, M., Piccolo, M. C.,
Siqueira Neto, M., Feigl, B. J., Cerri, C. E. P., Cerri,
C. C., Scopel, E., and Lal, R.: Assessing soil carbon
storage rates under no-tillage: Comparing the synchronic
and diachronic approaches, Soil Till. Res., 134, 207–212,
https://doi.org/10.1016/j.still.2013.08.010, 2013.
Dahlgren, R. A., Saigusa, M., and Ugolini, F. C.: The nature, properties and management of volcanic soils, edited by: Sparks, D.
L., Advances in Agronomy, 82, 113–182, 2004.
Defrenet, E., Roupsard, O., Van den Meersche, K., Charbonnier, F., Pastor Pérez-Molina, J., Khac, E., Prieto, I., Stokes,
A., Roumet, C., Rapidel, B., de Melo Virginio Filho, E., Vargas, V. J., Robelo, D., Barquero, A., and Jourdan, C.: Root
biomass, turnover and net primary productivity of a coffee
agroforestry system in Costa Rica: effects of soil depth, shade
trees, distance to row and coffee age, Ann. Bot., 118, 833–851,
https://doi.org/10.1093/aob/mcw153, 2016.
Devitre, C., Gazel, E., Quesada, P., Tracy, R., Lucke, O., Soto, G.,
and Alvarado-Induni, G.: Geochemical Evidence for Multi-Stage
Chaotic Magma Mixing at Turrialba Volcano, Costa Rica, Fall
meeting AGU, Washington, D.C., 10–14 December 2018, 2018.
Don, A., Schumacher, J., Scherer-Lorenzen, M., Scholten,
T., and Schulze, E. D.: Spatial and vertical variation
of soil carbon at two grassland sites – Implications for
measuring soil carbon stocks, Geoderma, 141, 272–282,
https://doi.org/10.1016/j.geoderma.2007.06.003, 2007.
Feller, C., Albrecht, A., Blanchart, E., Cabidoche, Y. M., Chevallier, T., Hartmann, C., Eschenbrenner, V., Larre-Larrouy, M. C.,
and Ndandou, J. F.: Soil organic carbon sequestration in tropical
areas. General considerations and analysis of some edaphic determinants for Lesser Antilles soils, Nutr. Cycl. Agroecosys., 61,
19–31, https://doi.org/10.1023/A:1013359319380, 2001.
SOIL, 5, 315–332, 2019
Filimonova, S., Kaufhold, S., Wagner, F. E., Hausler, W., and
Kogel-Knabner, I.: The role of allophane nano-structure and
Fe oxide speciation for hosting soil organic matter in an allophanic Andosol, Geochim. Cosmochim. Ac., 180, 284–302,
https://doi.org/10.1016/j.gca.2016.02.033, 2016.
Gessler, P., Chadwick, O., Chamran, F., Althouse, L., and Holmes,
K.: Modeling Soil-Landscape and ecosystem properties using terrain attributes, Soil Sci. Soc. Am. J., 64, 2046–2056,
https://doi.org/10.2136/sssaj2000.6462046x, 2000.
Gómez-Delgado, F., Roupsard, O., le Maire, G., Taugourdeau, S.,
Pérez, A., van Oijen, M., Vaast, P., Rapidel, B., Harmand, J.
M., Voltz, M., Bonnefond, J. M., Imbach, P., and Moussa, R.:
Modelling the hydrological behaviour of a coffee agroforestry
basin in Costa Rica, Hydrol. Earth Syst. Sci., 15, 369–392,
https://doi.org/10.5194/hess-15-369-2011, 2011.
Hidalgo, C., Etchevers, J. D., Martinez-Richa, A., Yee-Madeira, H.,
Calderon, H. A., Vera-Graziano, R., and Matus, F.: Mineralogical characterization of the fine fraction (< 2 µm) of degraded
volcanic soils and tepetates in Mexico, Appl. Clay Sci., 49, 348–
358, https://doi.org/10.1016/j.clay.2009.11.007, 2010.
Huygens, D., Boeckx, P., Van Cleemput, O., Oyarzún, C.,
and Godoy, R.: Aggregate and soil organic carbon dynamics in South Chilean Andisols, Biogeosciences, 2, 159–174,
https://doi.org/10.5194/bg-2-159-2005, 2005.
Janik, L. J., Merry, R. H., and Skjemstad, J. O.: Can mid infrared
diffuse reflectance analysis replace soil extractions?, Aust. J.
Exp. Agr., 38, 681–696, https://doi.org/10.1071/EA97144, 1998.
Jobbagy, E. G. and Jackson, R. B.: The vertical distribution of
soil organic carbon and its relation to climate and vegetation, Ecol. Appl., 10, 423–436, https://doi.org/10.1890/10510761(2000)010[0423:TVDOSO]2.0.CO;2, 2000.
Kinoshita, R., Roupsard, O., Chevallier, T., Albrecht, A., Taugourdeau, S., Ahmed, Z., and Van Es, H.: Large topsoil organic carbon variability is controlled by Andisol properties
and effectively assessed by VNIR spectroscopy in a coffee
agroforestry system of Costa Rica, Geoderma, 262, 254–265,
https://doi.org/10.1016/j.geoderma.2015.08.026, 2016.
Kleber, M., Mikutta, R., Torn, M., and Jahn, R.: Poorly crystalline
mineral phases protect organic matter in acid subsoil horizons,
Eur. J. Soil Sci., 56, 717–725, https://doi.org/10.1111/j.13652389.2005.00706.x, 2005.
Kramer, M. G., Sanderman, J., Chadwick, O. A., Chorover, J., and
Vitousek, P. M.: Long-term carbon storage through retention of
dissolved aromatic acids by reactive particles in soil, Global
Change Biol., 18, 2594–2605, https://doi.org/10.1111/j.13652486.2012.02681.x, 2012.
Lal, R.: Soil carbon sequestration impacts on global climate change and food security, Science, 304, 1623–1627,
https://doi.org/10.1126/science.1097396, 2004.
Levard, C., Doelsch, E., Basile-Doelsch, I., Abidin, Z., Miche,
H., Masion, A., Rose, J., Borschneck, D., and Bottero, J.
Y.: Structure and distribution of allophanes, imogolite and
proto-imogolite in volcanic soils, Geoderma, 183, 100–108,
https://doi.org/10.1016/j.geoderma.2012.03.015, 2012.
Mathieu, J. A., Hatté, C., Balesdent, J., and Parent, É.: Deep soil
carbon dynamics are driven more by soil type than by climate: a
worldwide meta-analysis of radiocarbon profiles, Global Change
Biol., 21, 4278–4292, https://doi.org/10.1111/gcb.13012, 2015.
www.soil-journal.net/5/315/2019/
T. Chevallier et al.: SRO minerals as powerful factors explaining deep SOC stock distribution
Matus, F., Rumpel, C., Neculman, R., Panichini, M.,
and Mora, M. L.: Soil carbon storage and stabilisation in andic soils: A review, Catena, 120, 102–110,
https://doi.org/10.1016/j.catena.2014.04.008, 2014.
Mayer, L. M.: Relationships between mineral surfaces and organic
carbon concentrations in soils and sediments, Chem. Geol., 114,
347–363, https://doi.org/10.1016/0009-2541(94)90063-9, 1994.
Mayer, L. M. and Xing, B.: Organic matter-surface area relationships in acid soils, Soil Sci. Soc. Am. J., 65, 250–258,
https://doi.org/10.2136/sssaj2001.651250x, 2001.
Mayer, L. M., Schick, L., Hardy, K., Wagai, R., and McCarthy, J.: Organic matter in small mesopores in sediments and soils, Geochim. Cosmochim. Ac., 68, 3863–3872,
https://doi.org/10.1016/j.gca.2004.03.019, 2004.
McCarthy, J. F., Ilavsky, J., Jastrow, J. D., Mayer, L. M., Perfect, E.,
and Zhuang, J.: Protection of organic carbon in soil microaggregates via restructuring of aggregate porosity and filling of pores
with accumulating organic matter, Geochim. Cosmochim. Ac.,
72, 4725–4744, https://doi.org/10.1016/j.gca.2008.06.015, 2008.
McDowell, M. L., Bruland, G. L., Deenik, J. L., Grunwald,
S., and Knox, N. M.: Soil total carbon analysis in Hawaiian soils with visible, near-infrared and mid-infrared diffuse reflectance spectroscopy, Geoderma, 189–190, 312–320,
https://doi.org/10.1016/j.geoderma.2012.06.009, 2012.
Meijer, E. L. and Buurman, P.: Chemical trends in a perhumid
soil catena on the Turrialba volcano (Costa Rica), Geoderma,
117, 185–201, https://doi.org/10.1016/S0016-7061(03)00122-8,
2003.
Misnany, B., Tranter, G., McBratney, A. B., Brough, D.
M., and Murphy, B. W.: Regional transferability of
mid-infrared diffuse reflectance spectroscopic prediction
for soil chemical properties, Geoderma, 153, 155–162,
https://doi.org/10.1016/j.geoderma.2009.07.021, 2009.
Mizota, C. and Van Reewijk, L. P.: Clay mineralogy and chemistry
of soils formed in volcanic material in diverse climatic regions,
Soil Monograph no. 2, International Soil Reference and Information Center, Wageningen, 185 pp., 1989.
Mora, J. L., Guerra, J. A., Armas-Herrera, C. M., Arbelo, C.
D., and Rodríguez-Rodríguez, A.: Storage and depth distribution of organic carbon in volcanic soils as affected by environmental and pedological factors, Catena, 123, 163–175,
https://doi.org/10.1016/j.catena.2014.08.004, 2014.
Mora-Chinchilla, R.: Geomorfología de la Cuenca del Río Turrialba, Universidad de Costa Rica, San José, 2000.
Nocita, M., Stevens, A., Van Wesemael, B., Aitkenhead, M.,
Bachmann, M., Barthès, B. G., Ben Dor, E., Brown, D. J.,
Clairotte, M., Csorba, A., Dardenne, P., Demattê, J. A. M.,
Genot, V., Guerrerro, C., Knadel, M., Montanarella, L., Noon,
C., Ramirez-Lopez, L., Robertson, J., Sakai, H., Soriano-Disla,
J. M., Sheperd, K. D., Stenberg, B., Towett, E. K., Vargas,
R., and Wetterlind, J.: Soil Spectroscopy: An alternative to
wet chemistry for soil monitoring, Adv. Agron., 132, 139–159,
https://doi.org/10.1016/bs.agron.2015.02.002, 2015.
Noponen, M., Healey, J. R., Soto, G., and Haggar, J. P.: Sink or
source – The potential of coffee agroforestry systems to sequester
atmospheric CO2 into soil organic carbon, Agr. Ecosyst. Environ., 175, 60–68, https://doi.org/10.1016/j.agee.2013.04.012,
2013.
www.soil-journal.net/5/315/2019/
331
Parfitt, R. L.: Allophane and imogolite: role in soil biogeochemical processes, Clay Miner., 44, 135–155,
https://doi.org/10.1180/claymin.2009.044.1.135, 2009.
Parfitt, R. L. and Childs, C. W.: Estimation of forms of Fe and
Al: a review, and analysis of constrastig soils by dissolution
and Moessbauer methods, Aust. J. Soil Res., 26, 121–144,
https://doi.org/10.1071/SR9880121, 1988.
Parfitt, R. L., Russell, M., and Orbell, G. E.: Weathering sequence of
soils from volcanic ash involving allophane and halloysite, New
Zealand, Geoderma, 29, 41–57, https://doi.org/10.1016/00167061(83)90029-0, 1983.
Parfitt, R. L., Theng, B. K. G., Whitton, J. S., and Shepherd,
T. G.: Effects of clay minerals and land use on organic matter pools, Geoderma, 75, 1–12, https://doi.org/10.1016/S00167061(96)00079-1, 1997.
Parfitt, R. L. and Wilson, A. D.: Estimation of allophane and halloysite in three sequences of volcanic soils, Catena Suppl., 7, 1–
8, 1985.
Payan, F., Jones, D. L., Beer, J., and Harmand, J. M.: Soil characteristics below Erythrina poeppigiana in organic and conventional Costa Rican coffee plantations, Agroforest. Syst., 76, 81–
93, https://doi.org/10.1007/s10457-008-9201-y, 2009.
Percival, H. J., Parfitt, R. L., and Scott, N. A.: Factors controlling soil carbon levels in New Zealand grasslands: Is clay
content important?, Soil Sci. Soc. Am. J., 64, 1623–1630,
https://doi.org/10.2136/sssaj2000.6451623x, 2000.
Poulenard, J., Podwojewski, P., and Herbillon, A. J.: Characteristics of non-allophanic andisols with hydric properties from the Ecuadorian paramos, Geoderma, 117, 267–281,
https://doi.org/10.1016/s0016-7061(03)00128-9, 2003.
Powers, J. S. and Schlesinger, W. H.: Relationships among soil carbon distributions and biophysical factors at nested spatial scales
in rain forests of northeastern Costa Rica, Geoderma, 109, 165–
190, https://doi.org/10.1016/s0016-7061(02)00147-7, 2002.
Rasse, D. P., Mulder, J., Moni, C., and Chenu, C.: Carbon turnover
kinetics with depth in a French loamy soil, Soil Sci. Soc. Am. J.,
70, 2097–2105, https://doi.org/10.2136/sssaj2006.0056, 2006.
R Core Team: R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing, Vienna, Austria,
available at: https://www.R-project.org/ (last access: 31 October 2019), 2016.
Ross, C. S. and Kerr, P. F.: Halloysite and allophane, U.S. Geological Survey Professional Papers, 185–189, 135–148, 1934.
Scheel, T., Dörfler, C., and Kalbitz, K.: Precipitation of dissolved organic matter by aluminium stabilizes carbon in
acidic forest soils, Soil Sci. Soc. Am. J., 71, 64–74,
https://doi.org/10.2136/sssaj2006.0111, 2007.
Shen, Q., Suarez-Abelenda, M., Camps-Arbestain, M., Calvelo
Pereira, R., McNally, S. R., and Kelliher, F. M.: An investigation of organic matter quality and quantity in acid soils asinfluenced by soil type and land use, Geoderma, 328, 44–55,
https://doi.org/10.1016/j.geoderma.2018.05.006, 2018.
Shi, S., Zhang, W., Zhang, P., Yu, Y., and Ding, F.: A synthesis of change in deep soil organic carbon stores with afforestation of agricultural soils, Forest Ecol. Manag., 296, 53–63,
https://doi.org/10.1016/j.foreco.2013.01.026, 2013.
Shoji, S., Nanzyo, M., Dahlgren, R. A., and Quantin, P.: Evaluation and proposed revisions of criteria for Andosols in the
SOIL, 5, 315–332, 2019
332
T. Chevallier et al.: SRO minerals as powerful factors explaining deep SOC stock distribution
world reference base for soil resources, Soil Sci., 161, 604–615,
https://doi.org/10.1097/00010694-199609000-00005, 1996.
Soriano-Disla, J. M., Janik, L. J., Rossel, R. A. V., Macdonald, L. M., and McLaughlin, M. J.: The performance
of visible, near-, and mid-infrared reflectance spectroscopy for prediction of soil physical, chemical, and
biological properties, Appl. Spectrosc. Rev., 49, 139–186,
https://doi.org/10.1080/05704928.2013.811081, 2014.
Takahashi, T. and Dahlgren, R. A.: Nature, properties and function
of aluminum–humus complexes in volcanic soils, Geoderma,
263, 110–121, https://doi.org/10.1016/j.geoderma.2015.08.032,
2016.
Terra, F. S., Dematte, J. A. M., and Rossel, R. A. V.: Proximal spectral sensing in pedological assessments: vis-NIR spectra for soil
classification based on weathering and pedogenesis, Geoderma,
318, 123–136, https://doi.org/10.1016/j.geoderma.2017.10.053,
2018.
Tonneijck, F. H., Jansen, B., Nierop, K. G. J., Verstraten, J. M.,
Sevink, J., and De Lange, L.: Towards understanding of carbon
stocks and stabilization in volcanic ash soils in natural Andean
ecosystems of northern Ecuador, Eur. J. Soil Sci., 61, 392–405,
https://doi.org/10.1111/j.1365-2389.2010.01241.x, 2010.
Torn, M., Trumbore, S., Chadwick, O., Vitousek, P., and Hendricks,
D.: Mineral control of soil organic carbon storage and turnover,
Nature, 389, 170–173, https://doi.org/10.1038/38260, 1997.
SOIL, 5, 315–332, 2019
Ugolini, F. C. and Dahlgren, R. A.: Soil development in volcanic
ash, Global J. Environ. Res., 6, 69–81, 2002.
Visacarra Rossel, R. A., Behrens, T., Ben-Dor, E., Brown, D.
J., Dematte, J. A. M., Shepherd, K. D., Shi, Z., Stenberg,
B., Stevens, A., Adamchuk, V., Aichi, H., Barthes, B. G.,
Bartholomeus, H. M., Bayer, A. D., Bernoux, M., Bottcher,
K., Brodsky, L., Du, C. W., Chappell, A., Fouad, Y., Genot,
V., Gomez, C., Grunwald, S., Gubler, A., Guerrero, C., Hedley, C. B., Knadel, M., Morras, H. J. M., Nocita, M., RamirezLopez, L., Roudier, P., Campos, E. M. R., Sanborn, P., Sellitto,
V. M., Sudduth, K. A., Rawlins, B. G., Walter, C., Winowiecki,
L. A., Hong, S. Y., and Ji, W.: A global spectral library to
characterize the world’s soil, Earth-Sci. Rev., 155, 198–230,
https://doi.org/10.1016/j.earscirev.2016.01.012, 2016.
Wada, K. J.: Allophane and Imogolite, in: MineraIs in Soil Environments, edited by: Dixon, J. B. and Weeds, S. B., 2nd ed. Soil Sc.
Soc. Am., WI, 1051–1108, 1989.
Welsh, K., Boll, J., Sanchez-Murillo, R., and Roupsard, O.: Isotope hydrology of a tropical coffee agroforestry watershed: Seasonal and event-based analyses, Hydrol. Process., 32, 1965–
1977, https://doi.org/10.1002/hyp.13149, 2018.
Zehetner, F., Miller, W. P., and West, L. T.: Pedogenesis of Volcanic
Ash Soils in Andean Ecuador, Soil Sci. Soc. Am. J., 67, 1797–
1809, https://doi.org/10.2136/sssaj2003.1797, 2003.
www.soil-journal.net/5/315/2019/
...