Effect of ratio of roughage to concentrate and level of feed intake on ovine ruminal vitamin B 12  production.
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001681:Biological Assay; D002404:Catheterization; D003035:Cobalt; D003036:Cobalt Isotopes; D004386:Duodenum / Q000378:metabolism; D056890:Eukaryota / Q000378:metabolism; D007408:Intestinal Absorption; D007421:Intestine, Small / Q000502:physiology; D008297:Male; D011865:Radioisotope Dilution Technique; D012417:Rumen / Q000378:metabolism* / Q000502:physiology; D012756:Sheep; D014805:Vitamin B 12 / Q000096:biosynthesis* / Q000097:blood / Q000378:metabolism; D003313:Zea mays
D003036:Cobalt Isotopes; D003035:Cobalt; D014805:Vitamin B 12