You might consider spraying RoundUp on the area to eliminate all grasses and weeds prior to discing. Theres other, more expensive sprays that kill only jointed grasses but not broad leafed plants, etc. I have limed areas before, but to me, other than alfalfa, not too many food plot blends seem to need that high of a pH. I could be wrong, but my ground is close to 7 already. Thats after liming three times in 5 years. I like the clover mixes and kale, planted alongside cover like goldenrod and ragweed and switchgrass. What about you guys? By the way, I do this inside deer pens, not so much in the wild.