1 Correction to: Biochar https://doi.org/10.1007/s42773-020-00071-1

The article “Enhancing soil water holding capacity and provision of a potassium source via optimization of the pyrolysis of bamboo biochar”, written by Tran Thi Thu Hien, Toshiki Tsubota, Tomoyuki Taniguchi and Yoshiyuki Shinogi was originally published electronically on the publisher’s internet portal on 20th of October 2020 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on December 2020 to © “The Author(s) 2020” and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

The original article has been corrected.