Related by context. Frequent words. (Click for all words.) 67 chemical fertilizers 65 synthetic fertilizers 62 synthetic pesticides 60 pesticides 58 pesticides herbicides 58 fertilizers pesticides 58 monocultures 57 fertilizers 57 pesticides fertilizers 52 fertilizer 52 nitrogen fertilizers 52 herbicides 51 toxic pesticides 51 crop residues 51 biofuel crops 50 bio fuels 50 nitrogen fertilizer 50 agricultural residues 49 manures 49 organic fertilizers 49 fossil fuels 49 artificial additives 48 arable land 48 pesticide 48 transgenic plants 48 Herbicides 47 organic 47 agro chemicals 47 Organic farming 47 genetic modification 47 oilseed crops 47 synthetic hormones 47 livestock manure 46 insecticides 46 fertile soils 46 biofuels 46 GMOs 46 biomass feedstocks 46 agrochemicals 46 crop yields 46 nutrients 46 chemicals 46 organic farming 46 fossil fuel 45 monoculture 45 preservatives 45 Nitrates 45 genetically modified crops 45 weed seeds 45 Fossil fuels 45 genetically modified organisms 45 crops 45 chemical preservatives 45 hydrogenated oils 45 biofuel 45 organic fertilizer 45 crop residue 45 transgenic crops 45 corn ethanol 45 Pesticides 44 formic acid 44 processed foods 44 soil fertility 44 feedstuffs 44 GMO crops 44 nonorganic 44 weed killers 44 refined sugars 43 compost 43 chemical additives 43 fungicides 43 stover 43 forage crops 43 wheat bran 43 biotech crops 43 Cellulosic ethanol 43 composts 43 crop rotations 43 nitrous oxides 43 lawn clippings 43 tilling 42 mechanization 42 environmentally benign 42 croplands 42 environmentally harmful 42 feedstock 42 naturally occurring bacteria 42 minimally processed 42 cereal grains 42 bio solids 42 nitrites 42 chemically treated 42 genetically modified 42 legumes 42 fumigants 42 micronutrients 42 fertilizing 42 mulches 42 linseed 41 poisonous chemicals 41 arable lands