Been doing a wheat plot and burning/ replanting every fall for several years. This year we bought a new farm and I have started a couple of new plots. I'm having trouble with one in particular and clumps of dead grass. I cut it 3 weeks ago, and sprayed with gly two weeks ago. I have disk the past two days with a pull type and pulled a drag behind it, just like I did on all the others. It has broken the ground good and is nice and smooth, but in have huge rolls of dead grass everywhere. Is this normal the first year? Any way to get rid of it, or is it okay to plant.