314 NATURE AND PROPERTIES OF SOILS 



166. Bulk analysis — complete solution of the soil. — By 

 the use of hydrofluoric acid or by fusion with potassium and 

 sodium carbonate, the entire soil mass may be decomposed and 



Fig. 53. — Front and side view of a Kjeldahl distilling battery. (A), 

 Kjeldahl flask; (B), trap; (C), condenser tank; (D), receiving flask 

 containing standard acid and (E), Bunsen burner. 



its constituents determined. 1 The amount of lime (CaO) or 

 any other constituent, 2 may thus be expressed in percentage 



1 Wiley, Harvey W., Principles and Practices of Agricultural Chemical 

 Analysis, Vol. 1, pp. 398-399, 1906. 



a Schollenberger presents some interesting data regarding the pro- 



