Jarkani. Effect of Fertilizer and Fertilizer Manure Nickerson Star Swallow on Growth Seeds Rubber (Havea brasiliensis Muell Arg) Origin Grafting: Pengaruh Pemberian Pupuk Nickerson Star dan Pupuk Kotoran Burung Walet Terhadap Pertumbuhan Bibit Tanaman Karet (Havea brasiliensis Muell Arg) Asal Okulasi. agri. j. ilmu. pertan. [Internet]. 2013 Dec. 30 [cited 2026 Apr. 25];2(2):44-8. Available from: https://ojs.uwgms.ac.id/index.php/agrifarm/article/view/1273