Journal of Agricultural Studies ISSN 2166-0379 2020, Vol. 8, No. 3 http://jas.macrothink.org 846 Weed Suppression With Babassu Straw and spatial Rice Arrangement Denise Lima Cavalcante Marinho (Corresponding author) State University of Tocantina Region of Maranhão, Center for Exact, Natural and Technological Sciences, Imperatriz, Maranhão, Brazil. E-mail: deniselcaval@gmail.com Raimundo Nonato Viana Santos State University of Maranhão, Weed Laboratory, São Luis, Maranhão, Brazil. E-mail: rvianasantos@gmail.com Ivaneide de Oliveira Nascimento State University of Tocantina Region of Maranhão, Center for Exact, Natural and Technological Sciences, Imperatriz, Maranhão, Brazil. E-mail: Ivaneide_agro@yahoo.com.br Maria José Pereira Corrêa State University of Maranhão, Chemistry and Biology Department, São Luis, Maranhão, Brazil. E-mail: mjcorreazea@hotmail.com.br Maria Rosângela Malheiros Silva State University of Maranhão, Department of Phytotechnics and Plant Health, São Luis, Maranhão, Brazil. E-mail: romalheir@gmail.com Received: May 5, 2020 Accepted: June 12, 2020 Published: June 22, 2020 doi:10.5296/jas.v8i3.16974 URL: https://doi.org/10.5296/jas.v8i3.16974 Abstract Soil cover and spatial crop arrangement are practices that can suppress weeds. The study aimed to evaluate the babassu straw cover and the spatial arrangement of rice crops as weed control. The experiment was conducted in two rice arrangements spatial, the first, with a spacing of 35 cm and sowing density of 87 kg ha -1 (S35D87); and the second, with a spacing of