The objective of this study was to study the effect of YEFECAP (yeast-fermented cassava chip) in
replacing soybean meal (SBM) in concentrate mixtures. Four, early lactating (30±13 day-inmilk)
Holstein Friesian crossbred cows (50×50; HF×Native Thai cattle) were randomly
assigned according to a 4×4 Latin square design to receive 4 dietary treatments (4 replacement
levels of SBM by YEFECAP at 0, 33, 67 and 100% CP in concentrates).