That's all only theory at this time. Without tests or much producer experience, interseeded alfafa on narrow rows is still an unproven technique. That's why we are being cautious with our recommendations. Bottomland that remains wet for prolonged periods may not be suitable. Gray-colored clay in the subsoil underlying sand is a sign of poorly drained soils.
Soil tests are essential.
Collect soil samples in the fall one year in advance of seeding. Soil pH should be 7 or above. In order to raise the pH by planting time, lime should be worked into the soil at least six months before planting time. If soil tests call for limestone, apply it in the late fall or early winter. This timing will allow alfalfa to be seeded the following fall.