Lesmana, R. 2022. Rekomendasi Pemupukan NPK pada Tanaman Kakao (Theobroma Cacao) di Desa Metun Sajau Kecamatan Tanjung Palas Timur, Kabupaten Bulungan, Provinsi Kalimantan Utara: Recommendations For NPK Fertilization on Cocoa (Theobroma Cacao) Plants in Metun Sajau Village, East Tanjung Palas Sub-District, Bulungan District, North Kalimantan Province. Jurnal Ecosolum. 11, 2 (Dec. 2022), 126-135. DOI:https://doi.org/10.20956/ecosolum.v11i2.23487.