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Asrizal, Asrizal, Nuraeni Dwi Dharmawati, & Harsunu Purwoto.
" Efektivitas Rorak untuk Konservasi Tanah pada Perkebunan Kopi." <em>Jurnal BETA (Biosistem dan Teknik Pertanian)</em> [Online], 10.1 (2022): 197-205. Web. 29 Aug. 2026