东涝(旱)西旱(涝)
Flood in east(west)basin and drought in west(east) basin
FA旱地龙
FA yellow-humic acid drought resistance agent
FA handinong
FA
fulvic acid
FA handilong
半干旱地区生态系统
Semi-arid land ecosystems
半干旱和半湿润易旱地区
the semi-arid area and semi-moist area which incline to be arid
北方旱地农业
Dry Land Agriculture in North China