The soil pH should be between 6.0 and 7.0 for best results. Limestone is used to increase the soil pH and should be mixed with the top 6 inches of soil before the soil is final graded. This is also the time to correct any nutrient deficiencies. Add 50 lbs. The limestone and fertilizer should be mixed with the top 6 inches of soil.
Most soils benefit from additions of organic matter.
Another method is to thoroughly mix 1 inch of heavier soil with the top 4 inches of sand. A better alternative is to add both organic matter and heavier soil rather than one or the other. Do not add sand into a clay soil, since this will cause it to pack harder than before much like concrete. Organic matter sources vary. Similar amounts of finished compost could also be considered.