1. Agricultural Technology Department, Universitas Jenderal Soedirman , Purwokerto 53122 , Indonesia
2. Laboratory of Agricultural and Food Policy Studies, Institute of Tropical Agricultural and Food Policy Security, Universiti Putra Malaysia , Selangor Darul Ehsan 43400 , Malaysia
3. Department of Agricultural Sciences, School of Agriculture, Food and Wine, University of Adelaide , Urrbrae SA 5064 , Australia