crude protein. 6. aocs official method ba 4f-00, reapproved 2009. combustion method for determination of crude protein in soybean meal. 7. aocs official method ba 4a-38, reapproved 2009. nitrogen-amonia-protein modified kjeldahl method. 8. aoac official method 992.23, 18th ed, 2005. crude protein in cereal...