Kunlanit, B., Siritrakulsak, T. and Vityakon, P. 2022. Zinc promotes growth, yield and economic return of cassava variety Kasetsart 50 production. Asia-Pacific Journal of Science and Technology. 27, 05 (Aug. 2022), APST–27. DOI:https://doi.org/10.14456/apst.2022.67.