Comparative trials of different fertilization treatments on experimental furrowed plantations of local hybrid poplars (Populus simonigra) in irrigated sandy soils. Intercropping is also carried out at intervals between rows of poplars. - - Afforestation, Forestry Research & Development in Three-North Region: GCP/CPR/009/BEL. Afforestation, Forestry Research Planning & Devpt. in the Three-North Region
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