山地旱作区
Mountainous and arid area
水旱轮作
paddy rice-upland crop rotation
Rice-wheat Rotation
paddy-upland rotation
Paddy-dryland rotation
Paddy rice with upland crop rotation system
paddy rice and dryland crops rotation
Rotation of rice and upland crops
rotation of rice and dry crops
Dryland crop and paddy rice rotation
FA旱地龙
FA
FA yellow-humic acid drought resistance agent
FA handinong
FA handilong
fulvic acid
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
半期旱作
half period dry management
北方旱地农业
Dry Land Agriculture in North China