This page seems to suggest that poplar seedling density in clearcut areas is on the order of thousands per acre, which then thin out considerably as the trees m

This page seems to suggest that poplar seedling density in clearcut areas is on the order of thousands per acre, which then thin out considerably as the trees mature. See the "seedling development" section. http://www.na.fs.fed.us/pubs/silvics_manual/volume_2/liriodendron/tulipifera.htm http://www.na.fs.fed.us/pubs/silvics_manual/volume_2/liriode...