Studies on Growth Regularities of Yujin (Curcuma longa L. ) Studies on Biologlcal Characteristics or Ligusticum chuanxiong Hort. Evaluation for the Growth Regularity of Progenies from Yingde Loblolly Pine Seed Orchard in North Guangdong Study on the Growth of One-year-old Litsea cubeba Seedlings in Mountainous Area of Guizhou Province A Preliminary Study on Growth Regularity of Introduced Taiwania flousiana Young Seedling