Mapping of Goosegrass (Eleusine indica) Herbicide Resistant-Glyphosate Populations and Their Distribution on Rubber Fields at Rambutan Estate PTPN III - Purba, Agustinus Kristian; UNIVERSITAS SUMATERA UTARA (Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan, 2018)