Program Peremajaan Sawit Rakyat (PSR) di Kecamatan Tandun, Kabupaten Rokan Hulu, Provinsi Riau (2018-2021) = People's Palm Oil Replanting Program (PSR) in Tandun District, Rokan Hulu Regency, Riau Province (2018-2021)

Analisis diversifikasi lahan dengan tanaman sekunder menggunakan linear programming: studi kasus: kebun kelapa sawit rakyat di Kabupaten Langkat Sumatera Utara = Land diversification analysis using linear programming: case: people owned palm oil plantation in Langkat, North Sumatra

Optimasi Rute Distribusi Minyak Goreng Kelapa Sawit di Wilayah Sumatera Utara = Optimization of Palm Cooking Oil Distribution Routes in North Sumatra

Keanekaragaman parem Etnis Karo di Pasar Pancur Batu, Kabupaten Deli Serdang, Sumatera Utara = Diversity of Ethnic Karo parem in Pancur Batu Market, Deli Serdang Regency, North Sumatera

Hubungan antara modal sosial dan modal fisik dengan kesejahteraan petani sawit mandiri : studi di Desa Aek Batu, Kec. Torgamba, Kab. Labuhanbatu Selatan, Sumatera Utara = Correlation between social capital and physical capital with walfare of self developing oil palm smallholders : study at Aek Batu Village, Torgamaba subdistrict, South Labuhanbatu, North Sumatera province, Republic of Indonesia / Dwi Zatmiko