小麦-玉米两茬平作机具
wheat-corn sequentill cropping machinery
春小麦玉米带田
spring wheat maize intercropping system
稻、大麦、小麦、玉蜀黍黑条萎缩病菌
rice black streaked dwarf virus
kobayashi & shinkai
小麦／玉米间作
Intercropping of wheat and maize
wheat-maize intercropping
小麦—玉米
wheat-corn
wheat-corn cropping system
小麦玉米带田
Wheat-corn band interplanting
小麦玉米间套作
wheat-maize intercropping
小麦—玉米连作
wheatmaize contimuous cropping
小麦－玉米轮作
Wheat-corn rotation
winter wheat-maize rotation
Wheat-com rotation
winter wheat and summer maize rotation
Winter wheat-summer corn crop rotation
wheatmaize rotation system
crop field
wheat-maize rotation
小麦—玉米轮作
Wheat maize rotation
winter wheat-maize rotation
小麦－玉米轮作体系
winter wheat-summer maize rotation system
小麦—玉米轮作体系
winter wheat-summer maize rotation system