Vitamin A status of ewes and lambs grazing nitrogen fertilized orchardgrass pastures.
D000821:Animal Feed / Q000032:analysis; D000818:Animals; D002338:Carotenoids / Q000378:metabolism; D005260:Female; D005308:Fertilizers; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen; D006109:Poaceae / Q000032:analysis; D012621:Seasons; D012756:Sheep / Q000378:metabolism*; D014131:Trace Elements; D014801:Vitamin A / Q000378:metabolism*
D005308:Fertilizers; D009566:Nitrates; D014131:Trace Elements; D014801:Vitamin A; D002338:Carotenoids; D009584:Nitrogen