BOL. IMP. CENTE. AGRIC. EXPT. STAT. VOL. I. 



PLATE XVII 



A. Soil from Nishigahara. 



(3) NaN08+ glycerine. (2) XaNOg. (1) (NH4)2S04. 



B. Soil from Arakawa. 



(3) NaNOs+ glycerine. (2) NaNOa- (1) (NH^lsSO^ 



