I have a section of lawn with very poor root development due to compacted sandy soil. It currently has around 50% coverage of grass. I had a crabgrass attack this summer, so I know there is seed waiting to germinate in the spring. I THINK my choices are:
1) Aerate and add compost now, with grass over-seeding in the spring. The new grass will be competing with the crabgrass, but adding Tupersan might work
2) Add a layer of compost and over-seed now, and hope the grass comes in thick enough to choke off the spring weeds. I can add organic material over time, to help with the sandy soil, and aerate next spring
3) Any other ideas?