Related by context. Frequent words. (Click for all words.) 58 longleaf pines 57 poplar trees 57 woody plants 57 forbs 56 lodgepole 56 perennial grasses 56 prairie grasses 56 crop residues 56 grasses 55 conifer trees 55 regrowth 55 replanting 54 native grasses 54 hardwood trees 54 hemlock trees 53 poplars 53 prairie grass 53 grassland habitat 53 softwoods 53 loblolly pine 53 mycelium 53 berry bushes 53 cottonwood trees 53 jack pine 52 perennial ryegrass 52 pennycress 52 harvestable 52 sphagnum moss 52 ponderosa pines 52 understory 52 bermudagrass 52 seed germination 52 salvinia 52 mulberry trees 52 biofuel feedstock 52 willows 52 pine plantations 52 cheatgrass 52 corn stalk 51 hay meadows 51 winegrapes 51 dune grass 51 herbaceous plants 51 deciduous forest 51 inoculum 51 Switchgrass 51 willow trees 51 vegetation 51 woody biomass 51 Replanting 51 sugar beet crop 51 longleaf pine 51 cattail 51 revegetate 51 nutrient uptake 50 lodgepole pine 50 Miscanthus 50 timber harvest 50 plantings 50 photosynthesize 50 Drip irrigation 50 cottonwoods 50 Eurasian milfoil 50 harvested acreage 50 replanted 50 sawfly 50 sorghum crop 50 woody debris 50 seeds germinate 50 switchgrass 50 oilseed crops 50 Ponderosa pine 50 blueberry bushes 50 Phragmites 50 hickories 50 atmospheric nitrogen 50 tall fescue 50 Controlled burns 50 sugarbeets 50 nutrient runoff 50 forage crops 50 biomass 50 biofuel feedstocks 50 shade tolerant 50 aspen trees 49 soybean plantings 49 sugarcane cultivation 49 timber harvests 49 beetle infestation 49 poplar 49 nitrogen fixing 49 reforesting 49 aquatic weeds 49 adelgids 49 regrowing 49 heartwood 49 conifers 49 knotweed 49 hardwood forest 49 sandy loam 49 trees