Theopencenter,orvase-shaped,system(fig.1)ismostcommonlyusedonalmond,apri-cot(cherry)fig,nectarine(peach)plum,andprunetrees.Manypear(apple)andpistachio trees are also trained to this system.With this method, the center of the tree is kept free of large branches and vigorous upright shoots (sucker...