Variationin Rooting Ability of Cuttings and Selective Effects among Ortets in A Japanese Larch Cutting Garden──A Case Study PRODUCTION AND ROOTING ABILITY OF CUTTINGS COLLECTED FROM LARIX KAEMPEFERI(LAMB.)CARR.ORTETS HEDGED IN DIFFERENT TYPES EFFECTS OF PRUNING IN DIFFERENT TYPES ON GROWTH AND CUTTING PRODUCTION OF ORTETS AND ROOTING AND GROWTH OF CUTTINGS Effects of Mechanical Treatments on Germination and Growth of Quercus×fangshanensis and Q. robur Seeds