Related by context. Frequent words. (Click for all words.) 66 nutrient loading 65 soil salinity 65 nutrient runoff 61 soil compaction 61 soils 60 soil erosion 59 acidifying 59 salination 59 riparian zones 59 inorganic fertilizers 58 soil fertility 58 riparian vegetation 58 acidify 58 Soil erosion 57 salinity 57 nitrification 57 acidic soils 57 Drip irrigation 56 buffer strips 56 shelterbelts 56 nitrogen 56 winterkill 56 Fertilizing 56 saturated soils 56 inoculum 56 potent greenhouse gas 56 alkalinity 55 livestock manure 55 alkaline soil 55 bioenergy crops 55 haylage 55 Nitrates 55 sedimentation 55 nutrient deficiencies 55 groundwater aquifers 55 perennial grasses 55 bermudagrass 54 groundwater withdrawals 54 intensively farmed 54 herbicides pesticides 54 atmospheric nitrogen 54 nitrogen fixing 54 overharvest 54 nitrous oxide emissions 54 shoreline erosion 54 forage crops 53 forage 53 overgrazing 53 nutrient uptake 53 forbs 53 nitrogen phosphorus 53 acidification 53 nonpoint source pollution 53 nitrogen fixation 53 nutrient absorption 53 crop residues 53 manures 53 silts 53 glyphosate resistance 53 absorbs carbon dioxide 53 irrigated crops 53 saltwater intrusion 53 acidified 53 nitrogen fertilizers 53 dissolved solids 53 tillage 53 drained soils 52 overgrazed 52 tall fescue 52 Grass clippings 52 siltation 52 soil pH 52 oxalic acid 52 sequester carbon 52 seed germination 52 acidic soil 52 foliar 52 carbaryl 52 sown crops 52 oxidization 52 leafhoppers 52 composted manure 52 sandy soils 52 nutrient 52 croplands 52 harvested acreage 52 fertilizers pesticides 52 nonpoint sources 52 clay soils 52 effluent discharge 52 rotational grazing 52 nutrient pollution 52 effluent disposal 52 desiccation 52 phytoplankton blooms 51 denitrification 51 irrigations 51 nutrient deficiency 51 periodic droughts 51 corn silage 51 phytate