Chemical Nature of Soils. 



A- r. 

 t J 



Chemical composition of noils. 



Inert ingredients in per cent, of dry soil. 



SWAMP AND LOESS SOILS. 



SOILS COMPARED WITH THEIR SUB-SOILS. 



SOILS. 



SUB-SOILS. 



ARID AND HUMID SOILS COMPARED. 



