BIOLOGICAL EFFECTS OF SYNCHRONOUS IRRADIATION (SOFT X RAYS AND ULTRA VIOLET RAYS)ON WHEAT SCREENING AND BREEDING OF RICE-BLAST RESISTANT MUTANT VARIETY RESEARCH ON WOOD PROPERTIES IMPROVEMENT V. GENETIC PARAMETER ESTIMATES FOR RING DENSITY COMPONENT TRAITS OF NEW CLONES IN POPULUS DELTOIDES×P.SIMONII Soft X-ray Diagnosis on Seed Development and Observation on Seed Germination and Seedling Growth in Artificial Hybridization in Cunninghamia and Cryptomeria STUDY ON THE IMPREGNATION OF PHENOL RESIN IN CHINESE FIR AND ITS IMPROVEMENT Effect of revegetation on functional groups of soil organic carbon on the Loess Plateau MUTAGENIC EFFECTS OF SYNCHROTRON SOFT X-RAY WITH RESONANCE ENERGY OF Nk IRRADIATION ON Rhizopus oryzae