EFFICIENCY OF EXTRACTION METHODS APPLIED TO JAPANESE SOIL SAMPLES (Collected in January 1954 at Hiroshima) sr7° d/m/grem air-dried soil I (cultivated) A-1 (0-1" top) Ool M HCl 0.61 2% 0,06 1.0 M HCl 0.85 2 0,08 6.0 M HCl 0.92 2 0.08 0072 4 0006 Oah9 1.8 tg 3 0.007 aed 0.067 mM 1.0 M NHAc a) Leach Reagent ° EEIQEGns TABLE 1 005 0008 2 0008 open Jae manana | -l- * s sw Sey. Se s oe