Journal Article 1.022 Research Support, Non-U.S. Gov't 318 Nitrogen 285 N762921K75 279 Soil 232 Phosphorus 225 27YLU75U4W 222 mehr ... Review 142 nutrients 124 7440-44-0 123 Carbon 123 Research Support, U.S. Gov't, Non-P.H.S. 69 Nutrients 62 nitrogen 58 climate change 57 Sewage 54 nutrient limitation 53 phosphorus 53 nutrient cycling 52 Fertilizers 50 059QF0KO0R 48 Water 48 Waste Water 47 nutrient removal 44 Manure 40 142M471B3J 36 Carbon Dioxide 36 Plant Proteins 33 Potassium 32 Minerals 31 weniger ...