Arid area in Northwest China
great northwest area in China
loess area in northwest area
pasturing area in Northwest China
the loess area in northwest China
spring wheat in dry land
Spring wheat in Northeast
spring wheat in rainfed land
spring wheat spring corn intercropping system
anti-Japanese base area in Northwest Shanxi
Changbai Mountain Area in China
hot summer and cold winter area in China
Mountainous area in northwest Guizhou
The north high plateau area in China
arid areas in Northwest China
Arid region in Northwest China
climate in Northwest China