Related by context. Frequent words. (Click for all words.) 73 soil 70 Soils 67 sandy soil 66 topsoil 62 soil fertility 62 sediment 61 sediments 59 vegetation 57 Soil 57 nitrogen 56 mulches 56 loam 56 aquifers 56 groundwater 55 salinity 55 soil moisture 55 grasses 54 sedimentation 54 wetland 54 nutrient 54 moist soil 53 soil erosion 53 silt 53 woody plants 53 watersheds 53 compaction 53 wetlands 52 vegetated 52 compost 52 forest ecosystems 52 humus 52 aquatic ecosystems 52 grassland 52 forage 52 rangelands 51 aquifer 51 tillage 51 lichens 51 Sediment 51 fertile soil 50 root rot 50 nitrate 50 flora 50 geochemistry 50 climatic conditions 50 peat bogs 50 semi arid 50 cropland 50 underground aquifers 50 turfgrass 50 floodplain 50 ecosystems 50 sulfides 49 forages 49 irrigated 49 alkali 49 dolomite 49 Vegetation 49 plantings 49 streambed 49 sedimentary 49 topography 49 mineralogy 49 croplands 49 crops 49 microorganisms 48 grasslands 48 nutrients 48 junipers 48 phosphorus 48 silica 48 phosphate 48 hydrology 48 floodplains 48 crop yields 48 geological formations 48 moisture 48 alkalinity 48 sulfide 48 ryegrass 48 shrubs 48 earthworms 48 moss 48 lichen 48 acidic 48 subsurface 48 diatoms 48 mulch 47 weed seeds 47 uplands 47 lakes 47 sulphate 47 basins 47 freeze thaw 47 contaminated soils 47 biochar 47 brines 47 habitats 47 nutrient rich 47 groundcover 47 rangeland