Irawan D, Nugrahini T, Mahdalena. Effect of Fertilizer Manure on Growth Swallow Seed Varieties Some Rubber (Hevea brasiliensis Muell Arg): Pengaruh Pemberian Pupuk Kotoran Burung Walet Terhadap Pertumbuhan Beberapa Varietas Bibit Karet (Hevea brasiliensis Muell Arg. agri. j. ilmu. pertan. [Internet]. 2013 Jul. 30 [cited 2024 Jul. 3];2(1):7-10. Available from: https://journal.uwgm.ac.id/agrifarm/article/view/1248