Ahmed, S., Ishiaku, Y., Ibrahim, H., Salisu, S., Sani, R. and Ibrahim, U. 2026. Nutrient digestibility, nitrogen balance and rumen metabolites profile of growing Yankasa rams fed Brachiaria ruziziensis with concentrate mixture ratios in a total mixed ration. Nigerian Journal of Animal Science. 27, 3 (Jun. 2026), 145–155.