Advances on the Study of Flowering Time Trait in Hybrid Rice Determination the Vigor of Rice Seed with Different Degrees of Aging with Ultraweak Chemiluminescence During Early Imbibition Orthogonal Test for the Best Conditions of Treating Licorice Seeds with Sulphuric Acid Effects of Presoaking on the Germination of Licorice Seeds THE APPLICATION OF IMMUNORADIOMETRIC ASSAY FOR RAPID IDENTIFICATION OF Xanthomonas campestris pv.oryzicola IN DISEASED RICE SEEDS