
 IndexValue1. Effective irrigation areaAnnual increase63.47 million hm21.55 million hm22. Water-saving irrigation area27.11 million hm23. Waterlogging proof area21.94 million hm24. Soil erosion and water loss treated areaAnnual increase1.07 million km250,0 (共 2843 字) [閱讀本文] >>