Factors Affecting Production And Income As Well As The Level Of Efficiency Of Arabika Coffee Production (Coffea Arabica) In Huta Bagasan Village, North Dempo District Humbang Hasundutan Regency: Faktor-Faktor Yang Mempengaruhi Produksi Dan Pendapatan Serta Efisiensi Usaha Tani Kopi Arabika (Coffea arabica ) Di Desa Huta Bagasan Kecamatan Dolok Sanggul Kabupaten Humbang Hasundutan (Departement of Socio-Economic Agricuture, Faculty of Agriculture, 2024)