Pasture quality for sheep as estimated by chromogen vs. nitrogen indicators.
D000821:Animal Feed; D000818:Animals; D004063:Digestion; D005243:Feces / Q000032:analysis; D008297:Male; D009584:Nitrogen / Q000032:analysis*; D010860:Pigments, Biological / Q000032:analysis*; D006109:Poaceae / Q000032:analysis*; D012756:Sheep
D010860:Pigments, Biological; D009584:Nitrogen