Related by context. Frequent words. (Click for all words.) 75 monoculture 58 artificial fertilizers 56 biofuel crops 54 transgenics 54 nitrogen fixing 54 crop residues 53 agrofuels 53 ecologies 52 synthetic fertilizers 52 crops 51 understory 51 forbs 51 transgenic crops 51 perennial grasses 51 pine plantations 50 synthetic pesticides 50 genetic modification 50 Herbicides 50 woody plants 50 pest resistant 50 chemical fertilizers 49 genetically modified crops 49 arable lands 49 agroforestry 49 herbaceous plants 49 fertile soils 49 herbicides 49 nitrogen fertilizers 49 broadleaf 49 plantations 48 GMO crops 48 Cerrado 48 overgrazed 48 transgenic plants 48 Aphids 48 cheatgrass 48 eucalypts 48 Miscanthus 48 salt tolerant 48 drylands 47 herbicide resistant 47 oilseed crops 47 brassicas 47 asexual reproduction 47 clearcuts 47 herbivores 47 corn borer 47 forage crops 47 overgrazing 47 GMOs 46 crop rotations 46 biome 46 Switchgrass 46 prairie grasses 46 arable land 46 mechanized farming 46 arable 46 agricultural residues 46 grasses 46 legume 46 biotech crops 46 croplands 46 biomass feedstocks 46 miscanthus 46 conifers 46 carbon sinks 46 ecosystems 46 soil fertility 46 defoliate 46 crop yields 45 native grasses 45 grassland 45 subsistence agriculture 45 clearcutting 45 purple loosestrife 45 Bacillus thuringiensis 45 organisms 45 sugar cane plantations 45 irrigated crops 45 crop residue 45 ryegrass 45 hardwood forests 45 transnational corporations 45 temperate zones 45 savannahs 45 cultivations 45 cereal crops 45 resistant varieties 45 GM canola 45 shrubby 44 ornamentals 44 biodiversity 44 clonal 44 aphids 44 whiteflies 44 biocontrol 44 corn ethanol 44 jatropha 44 nutrient runoff 44 genetically modified seeds 44 forest ecosystems