The aim of this study was to assess the effect rubber seed kernel heat processing on in vitro rumen biohydrogenation fatty acids and fermentation. experiment conducted with a completely randomized design (CRD). inclusion RSK at 0% (CON) 20% different methods as follows: Raw (RAWR), roasted (ROR), microwave irradiated (MIR), were heated hot air oven (RHO) total mixed ration (TMR) diets. hydrogen...