Machado, B.L.D.R., Schmidt, D.A., Robattini, J.C., Grohs, M. and Frescura, V.D.- souto 2020. Weed survey in pivot irrigated rice crop in Cachoeira do Sul - RS. Ciência e Natura. 42, (Feb. 2020), e43. DOI:https://doi.org/10.5902/2179460X40649.