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FIELD AND LABORATORY STUDIES OF SOILS 



EXERCISE A 1. A STUDY OF THE FORMATION OF 



SOILS. 



Equipment: This exercise is based upon the pupil's 

 own observations rather than upon laborator\^ work. Any 



Fig. 1. — The Kock may Lie but a Few Inches below the Surface. 



natural formations in the neighborhood, which are illus- 

 trative of soil-making processes, should be visited by the 

 class. Each pupil should write an account of the trip, 

 including a discussion of the questions given below. 



