Journal Article 1.440 Fertilizers 867 Research Support, Non-U.S. Gov't 418 Soil 393 N762921K75 351 Nitrogen 351 Phosphorus 197 mehr ... 27YLU75U4W 195 Population 180 Demographic Factors 178 Population Dynamics 173 Fertility 171 Sewage 166 Developing Countries 127 Carbon 121 7440-44-0 120 Family Planning 108 Manure 108 Review 100 Asia 91 142M471B3J 83 Carbon Dioxide 83 Economic Factors 83 Research Support, U.S. Gov't, Non-P.H.S. 78 Developed Countries 73 Population Characteristics 73 Metals, Heavy 72 Research Methodology 72 Soil Pollutants 66 Water Pollutants, Chemical 63 weniger ...