Related by context. Frequent words. (Click for all words.) 69 soils 62 sandy soils 60 alluvium 59 topsoil 58 gravels 57 clay soils 56 marl 56 alluvial deposits 55 streambeds 55 calcareous 55 acidic soil 55 mycelium 55 coarse sand 54 glacial till 54 silt 54 sandy soil 53 iron oxides 53 sedimentation 53 evaporation ponds 53 frac sand 53 Soils 53 saturated soils 53 sediment 53 compacted soil 52 decomposed granite 52 aquifers 52 sediments 52 soil 52 limestones 52 groundwater 52 silty 52 mill tailings 51 chlorides 51 subsoil 51 tailings 51 mineral salts 51 subgrade 51 limestone 51 surficial 51 dewater 51 laterite 51 sulfide 51 oxalic acid 50 fertile soils 50 saprolite 50 Sediments 50 lakebed 50 loam 50 drained soils 50 dolomite 50 heap leach pad 50 bentonite 50 coal seams 50 siliceous 50 roadbeds 50 chlorinated solvents 50 bermudagrass 50 contaminating groundwater 50 regolith 49 brines 49 sulphide ore 49 vegetated 49 UG2 49 spodumene 49 pyritic 49 hydroxide 49 tall fescue 49 aquifer 49 oxidizes 49 dewatered 49 streambed 49 skarn mineralization 49 feldspar 49 fertile soil 49 calcite 49 bottomland 49 phosphate 49 denitrification 49 basalts 48 soil fertility 48 olivine 48 inoculum 48 aquifer recharge 48 MgO 48 sphagnum moss 48 crushed limestone 48 carbonaceous 48 moist soil 48 sulphate 48 underground aquifers 48 diamondiferous 48 sulfide mineralization 48 Meridiani 48 oxide ore 48 compaction 48 wellfield 48 quicklime 48 diatomaceous earth 48 silicate 48 open pittable 48 nitrogen phosphorous