Cattle feeding Animal Feed 1 Animal Nutrition (Physiology) 1 Cattle 1 Dairy management 1 Dairy science 1 Environmental impact 1 Excretion 1 Metabolism 1 Mineral metabolism 1 Mineral supplements 1 Nitrogen 1 Nitrogen balance 1 Nitrogen in animal nutrition 1 Nitrogen metabolism 1 Nutrient requirements 1 Phosphorus 1 Phosphorus in animal nutrition 1 Pollution 1 Pollution and Degradation 1 Reproduction 1 Reproductive efficiency 1 Rumen metabolism 1