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cje ›› 1982, Vol. ›› Issue (4): 32-34,45.

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RELATIVITY OF LIVING SPACE AND MAN’S STRUGGLE FOR EXPANDING IT

Yuan Huarong   

  1. Department of Population Research, Lanzhou University
  • Received:1981-08-24 Online:1982-10-10

Abstract: The increase of population makes us feel the apparent decrease of the earth, and the progress in economy and science looks like expanding our living space.

Key words: Pinus sylvestris var. mongolica, Sand-fixing plantation forest, Natural regeneration, Regeneration traits