Related by context. Frequent words. (Click for all words.) 67 crop yields 64 soil erosion 62 soils 58 biodiversity 56 forage 55 soil moisture 55 tillage 55 cropland 54 crops 54 forages 54 micronutrients 54 salinity 53 nutrient 53 overgrazing 53 bio diversity 52 agronomic 52 chemical fertilizers 52 vegetation 52 croplands 51 sedimentation 51 Soils 51 grassland 51 legumes 51 carbon sequestration 50 carbon sinks 50 genetic diversity 50 biochar 50 rangeland 50 nutrients 49 beneficial insects 49 fertilizers 49 biofuel crops 49 rangelands 49 irrigated 49 topsoil 49 nitrogen 49 agricultural 49 desertification 48 alkalinity 48 grasslands 48 fertilizing 48 grasses 48 tilling 48 drought resistant 48 grazing 47 agronomy 47 ecosystems 47 crop 47 pasture 47 dryland 47 irrigation 47 arable land 47 wildlife habitat 47 agriculture 47 corn stover 47 organic farming 46 organic fertilizers 46 deforestation 46 sorghum 46 siltation 45 photosynthesis 45 nitrogen fertilizer 45 wetland 45 fertilizer 45 turfgrass 45 semi arid 45 soil 45 tropical forests 45 insect pests 45 Crop 44 Nutrients 44 smallholder farmers 44 germination 44 photosynthetic 44 atmospheric carbon dioxide 44 replanting 44 cultivation 44 nematodes 44 drought tolerant 44 ecology 44 Crops 44 acidification 44 silage 44 ryegrass 44 arable 44 plantings 44 native grasses 44 riparian 44 nematode 44 farming 43 habitats 43 pastureland 43 harvests 43 afforestation 43 organic gardening 43 agricultural inputs 43 droughts 43 defoliation 43 farmers 43 compaction 43 atmospheric CO2