Muhammad Taufik Yusuf * Corresponding Author Department of Agricultural Socio-Economics, Faculty of Agriculture, Universitas Gadjah Mada
and PTPN XI, Surabaya Indonesia
Jamhari Jamhari Department of Agricultural Socio-Economics, Faculty of Agriculture, Universitas Gadjah Mada Indonesia
Irham Irham Department of Agricultural Socio-Economics, Faculty of Agriculture, Universitas Gadjah Mada