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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Effect of ZnO NPs concentration on Zn content in brown rice. Values within the same year (2019 or 2020) that are followed by different letters are considered to be significantly different at the 0.05 probability level.