The suitability of soil fir individual entities is decided on the basis of the biorythmic and organic origin of a class of society. Characteristics of social classes are dependent on the nature of work or job normally pursued and exposure to the environment .
The holistic logic of soil selection is related to virtues of five great elements as projected by qualities of the soil. In vastu texts, properties of soil or earth are described in terms of appearance, taste, odour, sound, color shape, touch and slope of plot. These qualities find their equivalent attributes in human classes. Naturally, a correlation between soil characteristics and requirements of human groups can easily be established.