Journal Article 1.451 Fertilizers 873 Research Support, Non-U.S. Gov't 419 Soil 397 Nitrogen 354 N762921K75 353 Phosphorus 198 mehr ... 27YLU75U4W 195 Fertility 172 Population 172 Demographic Factors 170 Sewage 166 Population Dynamics 165 Carbon 121 7440-44-0 120 Developing Countries 120 Manure 109 Family Planning 105 Review 101 Asia 86 142M471B3J 84 Carbon Dioxide 84 Economic Factors 78 Research Support, U.S. Gov't, Non-P.H.S. 78 Metals, Heavy 72 Population Characteristics 72 Developed Countries 71 Research Methodology 69 Soil Pollutants 67 Water Pollutants, Chemical 63 weniger ...