Correction to: Nutr Cycl Agroecosyst (2020) 116:19–30 https://doi.org/10.1007/s10705-019-10019-y

The article Nitrogen balance in paddy fields under flowing-irrigation condition, written by Makoto Saiki, Thi Phuong Mai Nguyen, Junko Shindo, Kei Nishida, was originally published Online First without Open Access. After publication in volume 116, issue 1, page 19–30, the author decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2020, and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, 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.