Systematic descriptionption of the soils in a soil profile provides an important basis for the first assessment of the engineering properties of the soil. Attention is drawn to workable procedures for such descriptionptions and to the engineering consequences of the various terms used. A standard set of graphical symbols for the various soil types is given and a typical example of a soil profile is illustrated.
The detailed investigation of soil morphology, as expressed in soil profiles, provides the basic information for the derivation of three major requirements for the appraisal of agricultural land, namely, the classification of soils into taxonomic units, the assessment of soil genesis and predictions in terms of land-use. In this paper the important profile characteristics are enumerated and the terminology and procedure for the descriptionption of profile criteria are briefly explained. Attention is drawn to the possibilities of the interpretation of agricultural soil survey maps for engineering purposes.
The need for a simple standard means of measuring and descriptionbing soil colours in the field is discussed. Previous work on the problem of soil colour measurement is descriptionbed and the essential features of a simplified colour chart are then listed. A colour disc 21 in. in diameter is presented. This chart covers the whole range of colours likely to be encountered by the foundation engineer. The terms used to descriptionbe the colours are simple and the engineer should have little difficulty in mastering them. Though primarily intended for use as a rough colour indicator the chart is arranged so that intermediate colours may be named and identified. An important feature of the chart is that the colour nomenclature is consistent with widely accepted standards.