Predicting nickel concentration in soil using fractional-order derivative and visible-near-infrared spectroscopy indices

• Jianfei Cao,

  Roles Conceptualization, Formal analysis, Funding acquisition, Investigation, Writing – original draft, Writing – review & editing

  Affiliation College of Geography and Environment, Shandong Normal University, Jinan, China

  https://orcid.org/0000-0002-9395-0317

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• Wei Liu ,

  Roles Data curation, Resources, Software, Validation

  * E-mail: 15953166805@163.com

  Affiliation Shandong Yuanhong Survey Planing and Design CO.,LTD, Jinan, China

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• Yongyu Feng,

  Roles Data curation, Funding acquisition, Project administration, Supervision, Validation

  Affiliation Shandong Provincial Institute Land Spatial Data and Remote Sensing Technology, Jinan, China

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• Jianhua Liu,

  Roles Methodology, Visualization, Writing – original draft

  Affiliation Jinan Institute of Surveying and Mapping, Jinan, China

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• Yuanlong Ni

  Roles Formal analysis, Investigation, Methodology

  Affiliation Shandong Yuanhong Survey Planing and Design CO.,LTD, Jinan, China

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