USE OF PULAI PLANT LEAF EXTRACT Alstonia scholaris AS VEGETABLE HERBICIDE TO SUPPRESS Cyperus rotundus. Universitas Riau [Internet]. 2020 Oct. 23 [cited 2025 Aug. 2];4(2):22-8. Available from: https://jiik.ejournal.unri.ac.id/index.php/JIIK/article/view/99