This research aim was to study on the effect of addition mineral zinc and stratified ammoniation of palm fiber on Brahman Cross bulls perfonnance. This research was conducted at the PT. Andira Agro in April 2014 to October 2014. This research was used T Test Statistic for 10 the Brahman Cross bulls with an average age of 1,5-2 years, they were divided into two parts, the first part 5 bulls as c…