Matta, L.B., Cruz, C.D., Santos, I.G., Carvalho, C.G.P., Borba Filho, A.B. and Alves, A.D. 2019. Optimum environment number for the national sunflower trials network. Acta Scientiarum. Agronomy. 42, 1 (Sep. 2019), e42792. DOI:https://doi.org/10.4025/actasciagron.v42i1.42792.