Of all territorial settlements made at the end of the World War none has been so frequently criticized as that which we call the . - Richard Hartshorne

Geographers and agricultural economists have become increasingly interested in recent years in studying the associations of crops and livestock in different types of agriculture, in contrast to the separate consideration of individual crops or products.

The core study of geography is the study of places, that is the analysis of the significant differences that distinguish the various areas of the world from each other. Among the differences that are significant to this areal differentiation, one of the more obvious are differences in landforms; one of the least obvious to the eye, but nonetheless important in molding the character of areas, are the differences in their political organization. In pursuing these and other separate topics, geographers "radiate out in diverse directions" "and for various distances, toward the cores of other disciplines." As long as they realise where they are in reference to the central core, they may hope to understand each other purposes.

So important, indeed, is the use of maps in geographic work, that, without wishing to propose any new law, it seems fair to suggest to the geographer a ready rule of thumb to test the geographic quality of any study he is making: if his problem cannot be studied fundamentally by maps - usually by a comparison of several maps - then it is questionable whether or not it is within the field of geography.