Related by context. Frequent words. (Click for all words.) 46 nutrient runoff 45 herbicides pesticides 45 nitrogen 44 phosphine 44 livestock manure 41 Paul Anastas 41 Fertilizing 41 nutrient loading 41 nitrogen fertilizer 40 phosphorus 40 hog manure 40 synthetic fertilizers 39 acidifying 39 nitrogen fertilizers 39 soils 39 Juurlink 39 atmospheric nitrogen 39 nutrient 39 soil fertility 39 fertilizer 39 potassium permanganate 39 fertilizing 39 Drip irrigation 39 disinfection byproducts 38 manure 38 Hydrogen sulfide 38 soil compaction 38 nitrogen fixation 38 distiller grain 37 phosphorous 37 fertilizers 37 oxygenating 37 alkaline soil 37 naturally occurring bacteria 37 nitrate 37 chicken manure 37 nutrient pollution 37 Robert Califf 37 chemicals 37 herbicides 37 seed germination 37 nitrogen phosphorus 36 humic acid 36 carbon tetrachloride 36 nitrogen fixing 36 nutrients 36 deplete oxygen 36 Biochar 36 ammonium sulfate 36 herbicide 36 organic acids 35 transpiration 35 nitrogen trifluoride 35 carbon sequestration 35 potassium hydroxide 35 Nitrogen 35 sulfate 35 sequester carbon dioxide 35 oxygenates 35 anaerobic bacteria 35 elemental sulfur 35 nitrogen phosphorous 35 pollutants 35 dissolved solids 35 corn silage 35 anhydrous 35 fish emulsion 35 aluminum sulfate 35 foliar 35 stover 35 manures 35 plankton blooms 35 bile acid 34 nitrous oxide emissions 34 denitrification 34 Anhydrous ammonia 34 Steven Nissen 34 Mark Kastel 34 chemical fertilizers 34 glyphosate 34 nitrites 34 lawn fertilizers 34 isoprene 34 microscopic algae 34 algal 34 phytate 34 alkanes 34 soil 33 nitrates 33 algae 33 phosphate fertilizers 33 evapotranspiration 33 sedimentation 33 sediment 33 sandy soils 33 aeration 33 microorganisms 33 contaminant 33 absorbing carbon dioxide 33 chlorides 33 bermudagrass