field grafting is performed after the vine has been planted in a vineyard and has aged a few years. the objective of using this method is to avoid replanting and a final product of a grapevine with two diversifications. the procedure of field grafting is performed with the vines still planted, by making two inversions in the rootstock of a certain type of grapevines and placing two of the same type of scions that differ from the rootstock into the rootstock. the most common ways to perform field grafting are the chip bud method, the t bud method, the cleft graft and the bark graft.