Current inventory and changes of the input/output balance of trace elements in farmland across China

• Runxiang Ni,

  Roles Data curation, Formal analysis, Investigation, Methodology, Resources, Writing – original draft, Writing – review & editing

  Affiliation Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China

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• Yibing Ma

  Roles Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Supervision, Validation, Writing – review & editing

  * E-mail: mayibing@caas.cn

  Affiliation Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China

  http://orcid.org/0000-0002-9340-8181

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