Related by context. Frequent words. (Click for all words.) 50 Switchgrass 50 switchgrass 50 jatropha 50 salt tolerant 49 biofuel crops 48 sweet sorghum 47 biofuel 47 agricultural residues 47 Jatropha 47 biomass 47 Cellulosic ethanol 47 biofuels 46 bioenergy 46 bio fuels 46 cellulosic 46 crop residues 45 oilseed crops 45 woody biomass 45 corn stover 45 alternative fuels 45 desalinization 45 Camelina 45 agroforestry 45 miscanthus 44 biobutanol 44 camelina 44 biomass fuels 44 perennial grasses 43 drought tolerant 43 feedstocks 43 Miscanthus 43 cellulosic ethanol 42 cellulosic biofuels 42 arid regions 42 drought resistant 42 OTEC 42 carbon sequestration 42 alternative energies 42 nitrogen fixation 42 kenaf 42 algae 41 transgenic plants 41 feedstock 41 grasses 41 croplands 41 soybean varieties 41 legume 41 bio diesel 41 corn ethanol 41 algal 41 bio ethanol 41 microalgae 41 prairie grasses 41 biodegradable plastics 41 biomass gasification 40 environmentally benign 40 cellulosic biomass 40 sequester carbon 40 coal liquefaction 40 biochar 40 livestock manure 40 thorium 40 wetland restoration 40 forage crops 39 native grasses 39 Qteros 39 soy biodiesel 39 transgenic crops 39 Virent 39 renewable fuels 39 legumes 39 prairie grass 39 chemical fertilizers 39 biobased 39 safflower 39 cereal grains 39 butanol 39 commercially viable 39 amaranth 39 conservation tillage 38 pest resistant 38 desalination 38 crops 38 crop rotations 38 genetic modification 38 insect resistant 38 organic farming 38 bioremediation 38 cattail 38 transgenic 38 xeriscaping 37 rotational grazing 37 proton exchange 37 organic fertilizers 37 grain sorghum 37 Bio Diesel 37 Algae 37 hybrids 37 Spirulina 37 nutrient runoff 37 biodiesel