Related by context. Frequent words. (Click for all words.) 64 salinity 61 Soil erosion 61 nutrient runoff 60 soil fertility 60 acidic soils 58 soil erosion 57 soils 57 crop yields 56 saltwater intrusion 56 rampant deforestation 55 nutrient deficiency 55 Severe drought 55 sedimentation 54 prolonged droughts 54 Salinity 54 alkalinity 54 fertile soils 53 insect populations 53 nutrient loading 53 nutrient absorption 53 desertification 53 soil compaction 53 biodiversity 52 Melting glaciers 52 agronomic practices 52 aridity 52 saturated soils 52 root rot 52 nitrogen fixing 52 environmental degradation 52 overexploitation 52 overgrazing 52 winterkill 51 semi arid regions 51 nitrogen fixation 51 nutritive value 51 nutrient uptake 51 drylands 51 irrigated agriculture 51 climatic conditions 51 nutrient deficiencies 51 atmospheric nitrogen 51 Phytophthora 51 Botrytis 51 rainfed 51 Rapid urbanization 51 herbicides pesticides 50 pest infestation 50 species extinctions 50 overfishing pollution 50 insect infestations 50 siltation 50 fungal diseases 50 aquatic habitats 50 acidification 50 toxic algae blooms 50 bollworms 50 pollinating insects 50 hydrological cycle 50 mineral salts 50 salt tolerant 50 irrigated crops 50 microscopic algae 50 frequent droughts 50 prolonged drought 50 desiccation 50 oestrogens 50 freshwater ecosystems 50 Nitrates 50 eutrophication 49 Droughts 49 dieback 49 cereal crops 49 seed germination 49 bee pollination 49 acidifying 49 scanty rainfall 49 pesticides fertilizers 49 arid lands 49 nitrogen fertilizers 49 sediment runoff 49 Fertilizing 49 Algae blooms 49 silts 49 habitat fragmentation 49 mycotoxin 49 unsaturated fatty acids 49 downy mildew 49 nematode 49 mealy bug 49 erratic monsoon 49 vegetation 49 algal 48 Adverse weather 48 dryness 48 aquatic ecosystem 48 ocean acidity 48 algal blooms 48 fertilizers pesticides 48 forage crops 48 harvested acreage