Newly afforested area in Horquin Desert (Inner Mongolia) planted with high -survival poplar clones in the Spring. Already there is a layer of dust and sand among the thin cuttings, but this is a relatively moderate sand accumulation. - - Afforestation, Fo. Research & Dev. in the Three-North Region: GCP/CPR/009/BEL. Since 1978 China has been implementing a massive rehabilitation programme aimed at afforestation of more than 35 million h a. over a 73-year period in the arid and sub-arid belt of Northwest, North and Northeast China, the so-called Three-North Region. T