冬小麦－夏玉米轮作体系
winter wheat-summer maize rotation system
冬小麦/夏玉米轮作田
winter wheat-summer maize rotation system
冬小麦-夏玉米轮作
rotation of winter wheat and summer corn
winter wheat-summer maize rotation
Wheat-maize rotation system
冬小麦—夏玉米轮作
Winter wheat-summer corn rotation
rotation of winter wheat and summer corn
夏玉米—冬小麦轮作制
summer maize-winter wheat rotation system
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
冬小麦-夏玉米
winter wheat-summer corn
winter wheat-summer maize system
Winter
小麦－玉米轮作
winter wheat and summer maize rotation
Winter wheat-summer corn crop rotation
wheatmaize rotation system
Wheat-corn rotation
winter wheat-maize rotation
wheat-maize rotation
Wheat-com rotation
crop field
小麦—玉米轮作
Wheat maize rotation
winter wheat-maize rotation
玉米-小麦轮作
Rotation of maize-winter wheat
Maize-wheat rotation system
Wheat-corn rotation
小麦-夏玉米
Wheat-summar co rn cropping
土壤－冬小麦系统
soil-winter wheat ecosystem
soil-winter wheat system
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
苜蓿－小麦轮作
alfalfa-wheat rotation system