Oji Paper Co. has successfully grafted natural eucalyptus onto genetically modified eucalyptus to create trees that grow well in acidic soils without worry that genetically altered seeds will spread in the environment. The graft has the root system of a eucalyptus tree genetically modified to absorb nutrients in acidic soils, where eucalyptus normally does not thrive. The rest of the graft from the trunk up is derived from a natural eucalyptus tree.