Effects of Different Treatments on Hardwood-Cutting Rooting and Related Oxidase Activity Changes during Rooting of Corylus avellana STUDIES ON ENDOGENOUS HORMONE LEVELS IN CUTTINGS OF THREE POPLAR SPECIES DURING ROOTING PROCESS Techniques for Vegetative Propagation of Japanese Larch by Hardwood Cuttings Cloning and Characterization of ARGONAUTE Genes in Populus Effect of Hormone on Hardwood Cutting and Rooting Ability of Picea crassifolia Scion Plucking Trees