The peanut should fall from the digger and land at about the same spot it was dug. Running the shaker chain too slow will cause the digger to choke with peanut vines, while running the chain too fast will pull the pods from the vine. Shaker aggression should be checked as well to insure that peanuts are not being lost. Adjust the inverters to insure the vines are fully inverted and no peanuts are on the ground. The windrow should be uniform and fluffy to promote good field curing.
Combine adjustment are equally important.
The goal is to remove peanuts from the vine without excessive damage to the pods. Start by checking the pickup and cylinder speed on your combine. Peanuts should be lifted gently into the combine, not pulled or pushed along. Cylinder speed should be adjusted to match harvest conditions. The slowest cylinder speed that still provides thorough picking is desired.