Models Mathematics and Statistics 9 Animal Nutrition (Physiology) 4 Feeds 4 Nutrients 4 Sustainability 4 Water Resources 4 Animal production 3 Growth 3 Livestock 3 Metabolism 3 Molecules 3 Nutrition physiology 3 Pigs 3 Pollution and Degradation 3 Poultry 3 Soil Chemistry and Mineralogy 3 Absorption 2 Animal Ecology 2 Animal Genetics and Breeding, (New March 2000) 2 Animal Nutrition (General) 2 Animal Nutrition (Production Responses) 2 Animal Physiology and Biochemistry (Excluding Nutrition) 2 Animal feeding 2 Aquatic Biology and Ecology 2 Biodiversity 2 Biomolecules 2 Cattle 2 Computer simulation 2 Crop yield 2