Related by context. Frequent words. (Click for all words.) 61 soil erosion 60 grazing 59 rangelands 59 livestock grazing 59 cattle grazing 58 grasslands 57 vegetation 55 rangeland 55 grassland 54 timber harvesting 54 desertification 53 habitat 53 cropland 53 soil fertility 52 grazing lands 52 deforestation 52 arable land 51 wildlife habitat 51 cheatgrass 51 herds 51 prolonged drought 51 deer herds 50 environmental degradation 50 habitats 50 forage 50 depredation 50 overpopulation 50 croplands 49 predation 49 cattle herds 49 forest ecosystems 48 siltation 48 livestock 48 elk herd 48 elk herds 48 pasture 48 herders 48 semi arid 48 Vegetation 48 pastoralists 47 urban sprawl 47 Droughts 47 biofuel crops 47 forests 47 arable 47 Deforestation 47 grasses 47 crop yields 47 junipers 47 farmland 47 pastureland 47 biodiversity 46 understory 46 wetlands 46 sedimentation 46 ecosystems 46 invasive weeds 45 timber harvest 45 deer herd 45 wetland 45 urbanization 45 inbreeding 45 Urbanization 45 wolf populations 45 silting 45 peatlands 45 soils 45 cereal crops 45 peat bogs 44 wildlife habitats 44 herbivores 44 woody plants 44 rapid urbanization 44 noxious weeds 44 droughts 44 aquatic ecosystems 43 tamarisk 43 tree felling 43 grazers 43 Grassland 43 Grazing 43 native grasses 43 anthropogenic 43 fragile ecosystems 43 forestland 43 chemical fertilizers 43 subsistence farming 43 Amazon rainforest 42 overfishing 42 subsidence 42 riparian 42 wildlife 42 cultivable land 42 elk 42 floods droughts 42 tillage 42 Yellowstone bison 42 prescribed burns 42 forages 42 pronghorn 42 invasive species