我国幅员辽阔,全境面积,计达一千一百余万方公里,约与欧洲全洲面积相当;惟欧洲纬度,介于北纬三十五度至七十度之间,南北狭而东西宽,全洲各地气候差别不多;我国国境,位於北纬十五度至五十五度之间,纬度延长,计较欧洲多出五度.

Various attempts have been made to divide China into regions of agricultural significance. Both the divisions of Nyhus and Cressey are not very satisfatory. According to my recent study, China may be divided into nine greater agricultural regions which are quite similar to the climatic regions of Co-ching Chu.