Lesmana, R. 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. JES 2022, 11, 126-135.