2025
Saurette, D., Heck, R., Gillespie, A., Berg, A., Biswas, A. (2025) Post-hoc Evaluation of Sample Size in a Regional Digital Soil Mapping Project. MDPI. 14(3):545. https://doi.org/10.3390/land14030545
Mesgar, M., Kia, S., Voroney, P.R., Lo, A., Gillespie, A.W. (2025) Role of aromatic and non-protonated aromatic carbon in the stability of soil organic matter. Organic Geochemistry. 201:104897. https://doi.org/10.1016/j.orggeochem.2024.104897
2024
Mehre, J., Schneider, K., Jayasundara, S., Gillespie, A., Wagner-Riddle, C. (2024) Adaptive multi-paddock grazing increases soil carbon stocks and decreases the carbon footprint of beef production in Ontario, Canada. Journal of Environmental Management, 371:123255. https://doi.org/10.1016/j.jenvman.2024.123255
Letwin, Nicholas V., Gillespie, Adam W., Ijzerman, Moira M., Kudla, Yaryna M., Csajaghy, Joel D., Prosser, Ryan S. (2024) Characterizing the Microplastic Content of Biosolids in Southern Ontario, Canada. Environmental Toxicology and Chemistry, 43:793-806. https://doi.org/10.1002/etc.5813
Chahal, Inderjot, Amsili, Joseph, Saurette, Daniel D., Bower, J. A., Gillespie, A. W., van Es, H. M., Van Eerd, L. L. (2024) Soil organic carbon to clay ratio in different pedoclimatic and agronomic conditions in northeastern North America: a new approach proposed. Geoderma Regional. 39:e00893. https://doi.org/10.1016/j.geodrs.2024.e00893
Saurette, D.D., Biswas, A., Heck, R.J., Gillespie, A.W., Berg, A.A. (2024) Determining minimum sample size for the conditioned Latin hypercube sampling algorithm. Pedosphere. 34:530–539. https://doi.org/10.1016/j.pedsph.2022.09.001
Gamage, J., Voroney, P., Gillespie, A.W., Longstaffe, J. (2024) Chemical composition of soil humin in an organic soil profile. Applied Geochemistry. 165:105954. https://doi.org/10.1016/j.apgeochem.2024.105954
Saurette, D.D., Heck, R.J., Gillespie, A.W., Berg, A.A., Biswas, A. (2024) Sample Size Optimization for Digital Soil Mapping: An Empirical Example. Land. 13:365. https://doi.org/10.3390/land13030365
Chaudhry, Hiba, Vasava, Hiteshkumar Bhogilal, Chen, Songchao, Saurette, Daniel, Beri, Anshu, Gillespie, Adam, Biswas, Asim. (2024) Evaluating the Soil Quality Index Using Three Methods to Assess Soil Fertility. Sensors. 24:864. https://doi.org/10.3390/s24030864
Mesgar, M., Voroney, R.P., Lo, A., Ardakani, O.H., Gillespie, A.W. (2024) Chemical composition and thermal stability of topsoil organic carbon: Influence of cropping system and tillage practices. European Journal of Soil Sciences. 75:e13459. https://doi.org/10.1111/ejss.13459
2023
Gamage, J., Voroney, P., Gillespie, A., Lo, A., Longstaffe, J. (2023) Evidence for the formation of fused aromatic ring structures in an organic soil profile in the early diagenesis. Scientific Reports. 13:12378. https://doi.org/10.1038/s41598-023-39181-8
Kodaolu, B., Mohammed, I., Gillespie, A.W., Audette, Y., Longstaffe, J.G. (2023) Phosphorus availability and corn (Zea mays L.) response to application of P-based commercial organic fertilizers to a calcareous soil. Soil Science Society of America Journal. 87:1386–1397. https://doi.org/10.1002/saj2.20587
Saurette, D.D., Heck, R.J., Gillespie, A.W., Berg, A.A., Biswas, A. (2023) Divergence metrics for determining optimal training sample size in digital soil mapping. Geoderma. 436:116553. https://doi.org/10.1016/j.geoderma.2023.116553
Jiang, Rong, Jayasundara, Susantha, Grant, Brian B., Smith, Ward N., Qian, Budong, Gillespie, Adam, Wagner-Riddle, Claudia. (2023) Impacts of land use conversions on soil organic carbon in a warming-induced agricultural frontier in Northern Ontario, Canada under historical and future climate. Journal of Cleaner Production. 404:136902. https://doi.org/10.1016/j.jclepro.2023.136902
Rabearison, T.J., Poirier, V., Gillespie, A., Laganière, J., DesRochers, A. (2023) Increasing tree productivity does not translate into greater soil organic carbon storage. Forest Ecology and Management. 535:120884. https://doi.org/10.1016/j.foreco.2023.120884
Easher, Tahmid Huq, Saurette, Daniel, Chappell, Emma, Lopez, Fernando de Jesus Montano, Gasser, Marc-Olivier, Gillespie, Adam, Heck, Richard J., Heung, Brandon, Biswas, Asim. (2023) Sampling and classifier modification to DSMART for disaggregating soil polygon maps. Geoderma. 431:116360. https://doi.org/10.1016/j.geoderma.2023.116360
2022
Saurette D.D., Berg A.A., Laamrani A., Heck R.J., Gillespie A.W., Voroney P. and Biswas A. (2022) Effects of sample size and covariate resolution on field-scale predictive digital mapping of soil carbon. Geoderma. 425:116054. https://doi.org/10.1016/j.geoderma.2022.116054
2021
Vestergaard, R.-J., Vasava, H. B., Aspinall D., Chen S.; Gillespie A., Adamchuk V. and Biswas, A (2021) Evaluation of optimized preprocessing and modeling algorithms for prediction of soil properties using vis‐nir spectroscopy. Sensors. 21:6745. https://doi.org/10.3390/s21206745
Baumann K., Eckhardt K.-U., Acksel A., Gros P., Glaser K., Gillespie A.W., Karsten U., Leinweber P. (2021) Contribution of biological soil crusts to soil organic matter composition and stability in temperate forests. Soil Biol. Biochem. 160:108315. http://dx.doi.org/10.1016/j.soilbio.2021.108315
Laamrani, A. PR Voroney, AW Gillespie, A Chehbouni (2021) Development of a Land Use Carbon Inventory for Agricultural Soils in the Canadian Province of Ontario. Land 10 (7), 765. https://doi.org/10.3390/land10070765
Audette, Y., Longstaffe, J., Gillespie, A.W., Smith, D.S., and Voroney, R.P. (2021) Validation and comparisons of NaOH and Na4P2O7 extraction methods for the characterization of organic amendments. Soil Sci. Soc. Am. J. 85:273-285. http://dx.doi.org/10.1002/saj2.20195
Warren C.J., Saurette, D.D., and Gillespie, A.W. (2021) Soil organic carbon content: decreases partly attributed to dilution by increased depth of cultivation in southern Ontario. Can. J. Soil Sci. 101:335–338. https://dx.doi.org/10.1139/cjss-2020-0092
2020
King, A.E., Ali, G.A., Gillespie, A.W., Wagner-Riddle, C. (2020) Soil Organic Matter as Catalyst of Crop Resource Capture. Frontiers in Environmental Science 8:50. https://doi.org/10.3389/fenvs.2020.00050
Laamrani, A., Voroney, P.R., Berg, A.A., Gillespie, A.W., March, M., Deen, B., Martin, R.C. (2020) Temporal change of soil carbon on a long-term experimental site with variable crop rotations and tillage systems. Agronomy, 10:10060840. https://doi.org/10.3390/agronomy10060840
Torres-Rojas, D., Hestrin, R., Solomon, D., Gillespie, A.W., Dynes, J.J., Regier, T.Z., Lehmann, J. (2020) Nitrogen speciation and transformations in fire-derived organic matter. Geochimica et Cosmochimica Acta. 276: 170-185. https://doi.org/10.1016/j.gca.2020.02.034
Adams, A.M., Kar, G., Bationo, A., Ouattara, B., Gillespie, A.W., Koala, S., Kimaro, A.A., Schoenau, J.J., Peak, D. (2020). Long-term effects of integrated soil fertility management practices on soil chemical properties in the Sahel. Geoderma. 366: 114207. https://doi.org/10.1016/j.geoderma.2020.114207
2019
Kar, G., Schoenau, J.J., Gillespie, A.W., Dhillon, G.S., Peak, D. (2019) Sulfur Species Formed in the Seed Row of Sulfur-Fertilized Soils as Revealed by K-Edge X-ray Absorption Near-Edge Structure Spectroscopy. Soil Sci. Soc. Am. J., 83:1324-1332. http://dx.doi.org/10.2136/sssaj2019.01.0008.
Hestrin, R., Torres-Rojas, D., Dynes, J.J., Hook, J.M., Regier, T.Z., Gillespie, A.W., Smernik, R.J., Lehmann, J. (2019) Fire-derived organic matter retains ammonia through covalent bond formation. Nature Communications. 10:664. https://doi.org/10.1038/s41467-019-08401-z
2018
Osei, A.K., Kimaro, A.A., Peak, D., Gillespie, A.W., and Van Rees, K.C.J. (2018) Soil carbon stocks in planted woodlots and Ngitili systems in Shinyanga, Tanzania. Agroforestry Systems, 92:251-262. https://doi.org/10.1007/s10457-016-0028-7
2017
Dhillon, G.S.,Gillespie, A.W., Peak, D., and Van Rees, K.C.J. (2017) Spectroscopic investigation of soil organic carbon composition under shelterbelt agroforestry systems. Geoderma, 298:1-13. https://doi.org/10.1016/j.geoderma.2017.03.016
2016
Adams, A.M., Gillespie, A.W., Kar, G., Koala, S., Ouattara, B., Kimaro, A.A., Bationo, A., Akponikpe, P.B.I., Schoenau, J.J., Peak, D. (2016) Long term effects of reduced fertilizer rates on millet yields and soil properties in the West-African Sahel . Nutrient Cycling in Agroecosystems, 106:17-29. https://doi.org/10.1007/s10705-016-9786-x
Diochon, A., A.W. Gillespie, B.H. Ellert, H.H. Janzen, E.G. Gregorich. (2016) Recovery of decomposing plant residue in soil: An evaluation of three fractionation methods based on size and density. Eur. J. Soil Sci. 67:196-205. https://doi.org/10.1111/ejss.12316
2015
Gregorich, E.G., Gillespie, A.W., Beare, M.H., Curtin, D., Sanei, H., Yanni, S. (2015) Evaluating biodegradability of soil organic matter by its thermal stability and chemical composition. Soil Biol. Biochem, 91:182-191. https://doi.org/10.1016/j.soilbio.2015.08.032
Gillespie, A.W., Phillips, C.L., Regier, T.Z., Dynes, J.J., Boyko, T., Chevrier, D., Peak, D. (2015) Advances in soft X-ray spectroscopy of biogeochemically relevant samples. Advances in Agronomy, 133:1-32. https://doi.org/10.1016/bs.agron.2015.05.003
2014
Gillespie, A.W., H. Sanei, A. Diochon, B.H. Ellert, T.Z. Regier, D. Chevrier, J.J. Dynes, C. Tarnocai, and E.G. Gregorich. 2014. Perennially and annually frozen soil carbon differ in their susceptibility to decomposition: Analysis of Subarctic earth hummocks by bioassay, XANES and pyrolysis. Soil Biol. Biochem. 68:106-116. http://dx.doi.org/10.1016/j.soilbio.2013.09.021
Gillespie, A.W., A. Diochon, B.L. Ma, M.J. Morrison, L. Kellman, F.L. Walley, T.Z. Regier, D. Chevrier, J.J. Dynes, E.G. Gregorich. 2014. Nitrogen input quality changes the biochemical composition of soil organic matter stabilized in the fine fraction – a long-term study. Biogeochemistry. 117:337-350. https://doi.org/10.1007/s10533-013-9871-z
Walley, F.L. , A.W. Gillespie, A.B. Adetone, J.J. Germida, R.E. Farrell. 2014. Manipulation of rhizosphere organisms to enhance glomalin production and C-sequestration: Pitfalls and promises. Can J Plant Sci. 94:1025-1032 https://doi.org/10.4141/CJPS2013-146
2007-2011
Gillespie, A.W., F.L. Walley, R.E. Farrell, P. Leinweber, K.U. Eckhardt, T.Z. Regier, and R.I.R. Blyth. 2011. XANES and pyrolysis-FIMS evidence of organic matter composition in a hummocky landscape. Soil Sci. Soc. Am. J. 75: 1741-1755. https://doi.org/10.2136/sssaj2010.0279
Gillespie, A.W., R.E. Farrell, F.L. Walley, A.R.A. Ross, P. Leinweber, K.U. Eckhardt, T.Z. Regier, and R.I.R. Blyth. 2011. Glomalin-related soil protein contains non-mycorrhizal-related heat-stable proteins, thioredoxin, lipids and humic materials. Soil Biol. Biochem. 43:766-777. https://doi.org/10.1016/j.soilbio.2010.12.010
Gillespie, A.W., F.L. Walley, R.E. Farrell, P. Leinweber, A. Schlichting, K.U. Eckhardt, T.Z. Regier, and R.I.R. Blyth. 2009. Profiling rhizosphere chemistry: Evidence from N and C \emph{K}-edge XANES and Py-FIMS. Soil Sci. Soc. Am. J. 73: 2002-2012. https://doi.org/10.2136/sssaj2008.0273
Gillespie, A.W., F.L. Walley, R.E. Farrell, T.Z. Regier, and R.I.R. Blyth. 2008. Calibration method at the N \emph{K}-edge using interstitial nitrogen gas in solid-state nitrogen-containing inorganic compounds. J. Synch. Rad. 15:532-534. https://doi.org/10.1107/S0909049508014283
Leinweber, P., J. Kruse, F.L.Walley, A. Gillespie, K.U. Eckhardt, R.I.R. Blyth, and T. Regier. 2007. Nitrogen K-edge XANES – An overview of reference compounds used to identify `unknown’ organic nitrogen in environmental samples. J. Synch. Rad. 14:500-511. https://doi.org/10.1107/S0909049507042513