My question has to do with unwanted grass, I have a grass that is taking over most of my blue grass in the backyard in Eastern Nebraska. I have been told it is poa, or annual bluegrass. It is a finer blade and just lies down when stepped on. Is the only way to get rid of this to kill it with roundup and reseed. Three years ago I done this and was amazed to see it come back even more aggressive. Is there anything else available i can use on this, I was also told that if i put on a preemergence real early in the spring it wouild not come up, that being, if i got rid of what is there now. Would really appreciate any anwers you good ppl have on this, Thanks again, Budge Heusman