160 THE STUDY OF PLANT COMMUNITIES ■ Chapter VII 



DRY COLD 



THE DISTRIBUTION OF; 



CLIMATIC 



TYPES 



DRY HOT 



2.VEGETATIONAL 

 FORMATIONS 



3. MAJOR ZONAL 

 SOIL GROUPS 



WET COLD 



5 CLIMATE 



a. 



5 



PRECIPITATION 



WET HOT 



VEGETATION 



SOILS 



FlG. 82. Schematic representation to show the interrelated distribution of 

 climatic types, vegetational formations, and major zonal soil groups— After 

 Blumenstock and Thornthwaite. 2 * 



types has been mentioned. It has also been suggested that the char- 

 acteristics of a mature profile are partially produced by the vege- 

 tation or that they are possible only because of the kind of vege- 



