Abstract
The lump quality produced by farmers in West Sumatra is low dueto limited access to technologies and postharvest facilities,insufficient implementation of Standard Operating Procedures (SOP), and other problems. The research aimed to study the adoption of postharvest SOP of rubber and its impact at farmers level in Dharmasraya Regency, West Sumatera. The experiment was conducted in three districts at Dharmasraya Regency of West Sumatra Province, from March until December 2013, utillizing descriptive survey through demonstration plot and field school. Parameters observed were the adoption level, lump quality, and rubber trade before and after the demonstration and field school. The result showed that the adoption level of rubber postharvest technology varied, from very low to very high. The adoption positively contributed to lump quality improvement at farmers level, thus meeting the SNI requirements. The price of sheet which meets the SNI did not significantly differ from low graded lump so it is less produced by farmers. Further regulation which endorsed industries to buy rubber at processing and marketing unit or farmers supporting market is needed.