Iastremski, M.P., Resende, J.T.V. de, Camargo, C.K., Ruthes, M.G. and Santos, M.A.P. 2021. Competition of onion genotypes in the soil and climatic conditions of Guarapuava, State of Paraná. Acta Scientiarum. Biological Sciences. 43, 1 (Apr. 2021), e53105. DOI:https://doi.org/10.4025/actascibiolsci.v43i1.53105.