nfOBOAifie flraanuKn m tons. o J 



arise from the di/fereiit proportions of samit and clay 

 which the various soils contain. 



The light soils are most easily and cheaply culti- 

 vated, and are found to be particularly well adapted 

 to the growing of some crops, such as barley, rje, 

 buckwheat, etc. They are porous, and for that reason 

 generally drj. 



The heavier soils require more skill and caution in 

 their cultivation, but are not so easily exhausted a.s 

 the others; they are particularly adapted to growini; 

 wheat, oats, indian corn, etc. Very heavy soils aiv 

 exceedingly liable to wetness, and can only be made 

 dry by draining. 



•■CTKMtl IV. NUMBER OF INORGANIC SUBST4NCB8 IN SOOU 

 KKABCmS rOR FERTILrrV OK BAKREBOfSSS. 



It has been said that soils are chiefly made up of 

 three substances, lime, sand (silica), and clay (alu- 

 mina). But besides these, chemical analysis finds 

 smaller quantities of some seven or eight other bodies. 

 In the first column of the following table, representing 

 the composition of three different soils, is to be SAeu 

 the names of these. 



