Related by context. Frequent words. (Click for all words.) 68 biofuel crops 63 biomass feedstocks 63 crop residues 62 perennial grasses 61 oilseed crops 61 forage crops 60 bioenergy 60 Switchgrass 60 Miscanthus 60 crops 59 forbs 59 switchgrass 58 transgenic plants 58 agroforestry 57 nitrogen fixation 57 crop yields 57 monocultures 57 crop rotations 57 biomass 57 cellulosic feedstocks 57 cereal crops 57 prairie grasses 56 corn stover 55 croplands 55 sweet sorghum 55 agricultural residues 55 miscanthus 55 biomass feedstock 54 salt tolerant 54 biofuels 54 conservation tillage 54 transgenic crops 54 crop residue 54 biofuel 53 soil fertility 53 biochar 53 seed germination 53 brassicas 53 cropland 53 stover 53 carbon sequestration 53 sequester carbon 53 Cellulosic ethanol 53 woody biomass 52 resistant varieties 52 herbaceous plants 52 bio fuels 52 feedstocks 52 woody plants 52 soybean varieties 52 horticultural crops 52 cellulosic ethanol 52 forages 52 pest resistant 51 molecular markers 51 nutrient runoff 51 transgenics 51 forage 51 cellulosic biomass 51 rotational grazing 51 livestock manure 50 genetic variability 50 cellulosic 50 Bt corn 50 corn ethanol 50 triticale 50 transgenic 50 herbicide resistant 50 corn silage 50 insect populations 50 grasses 50 corn acreage 50 cultivars 50 cellulosic biofuel 50 digestibility 50 feedstuffs 50 genetically modified crops 50 prairie grass 50 sequestering carbon 49 plantings 49 camelina 49 poplar trees 49 grassland 49 drought resistant 49 soybean aphids 49 nematodes 49 drylands 49 tillage 49 legumes 49 buffer strips 49 photosynthetic 49 alfalfa 48 tomato varieties 48 carbon sinks 48 jatropha 48 sorghum 48 temperate zones 48 cowpea 48 yeast strains 48 cereal grains 48 nematode