Amino Acid Content of Feeds

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Abstract
The leucine, valine, isoleucine and phenylalanine contents of various feed materials have been determined by the use of microbiological methods. Values for these amino acids in different lots of corn, corn gluten meal, alfalfa leaf meal, milo and soybean oil meal were quite uniform. More variability was observed between different samples of meat and bone scraps. The differences between the amino acid content of 2 rations calculated from data on individual ingredients and determined by actual analysis were within ± 7%.