“…Experiments A, B, C, and D investigated three different straw meal species (i. e., soybean straw powder, wheat straw powder, and rice straw powder), five different ratio of poplar wood fibers (i. e., 0, 25 %, 50 %, 75 %, and 100 %), five different particle sizes of soybean straw powder (i. e., 20 mesh to 40 mesh, 40 mesh to 60 mesh, 60 mesh to 80 mesh, 80 mesh to 100 mesh and 100 mesh to 120 mesh) and five different theoretical densities (i. e., 0.65 g/cm 3 , 0.70 g/cm 3 , 0.75 g/cm 3 , 0.80 g/cm 3 , and 0.85 g/cm 3 ) on the properties of the biomass composites. The theoretical density of the biomass composites prepared from the experiments in groups A, B, and C were all 0.70 g/cm 3 .…”