title: Estimation of rumen microbial nitrogen by three analytical methods.
mesh_terms: D000143:Acids; D000818:Animals; D002417:Cattle; D002623:Chemistry Techniques, Analytical; D008722:Methods; D009584:Nitrogen / Q000032:analysis* / Q000096:biosynthesis; D010472:Perchlorates; D011506:Proteins; D012417:Rumen / Q000032:analysis / Q000382:microbiology*; D014414:Tungsten
chemical_list: D000143:Acids; D010472:Perchlorates; D011506:Proteins; D009584:Nitrogen; D014414:Tungsten