Cocoa adoption Kakao cocoa perception superior seed Camellia sinensis L. Coffea sp Coffee Farming system profile Kopi WTP benih unggul competitiveness farmer's income farmers farming system feasibility fermentasi marketing pendapatan petani superior seeds technology Analisis hierarki proses (AHP) Analysis hierarchy process (AHP) Cocoa; farmer’s share; farmer groups; institutional Farmer preference Institutional model Nutmeg Rubber SEM adopsi atribut attitude attribute availability bean beans quality biji cocoa farmers comparative advantage comparative dan competitive advantage downstream industry export tax farmer groups farmer income farmers' income farmers’ revenue farmer’s share farming feasibility