314 NATURE AND PROPEETIES OF SOILS 



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



the use o£ hydrofluoric acid or by fusion with potassium and 

 sodium carbonate, the entire soil mass may be decomposed and 



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

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

 containing standard acid and (E), Bunsen burner. 



its constituents determined.^ The amount of lime (OaO) or 

 any other constituent,^ may thus be expressed in percentage 



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

 Analysis, Vol. 1, pp. S98-399, 1906. 

 « SchoUenberger presents some interesting data regarding tlie pro- 



