If you ask 10 different people you will probably get 10 different answers, but here is how I do it. Spray my herbicide to kill the weeds and junk out of it. Wait about 2 weeks thenspread my lime and work it into the soil. Wait a couple more weeks or so and if I need to spray herbicide I do it again. In the fall I plant some type of cereal grain with clover and rape, so I put out about 200lbs per acre of triple 13 at the time of planting. Later once I get a good stand going I spread about 150lbs of urea on it. This works really well for me in the soil where I plant my plots. My plots are always lush and green by mid oct if we get the rainfall here.