318 



THE SOIL. 



The above had remained a long time in pasture, and the 

 second was remarkable for the fattening qualities of its grass 

 when fed to cattle. 



The following are arable lands of great fertility : 



From Ohio. 



Subsoil. 



94.261 

 1.376 

 2.336 

 1.200 



0.243 

 0.310 



Soil 

 from Belgium. 



64.517 

 4.810 

 8.316 

 0.800 



Garb of 

 Lime. 



9.403 



.120 ) 

 .025 j" 



0.240 



trace 

 0.034 

 trace 



10.361 



100 

 0.013 



1.221 

 0.009 

 0.003 



0.447 



Soil from Moravia. Soil. 



Silica and fine Sand .77.209 87.143 



Alumina 8.514 5.666 



Oxides of Iron 6.592 2.220 



Oxide of Manganese 1.520 0.360 



Lime. 0.927 0.564 



Magnesia 1.160 0.312 



Potash, chiefly combined with 



Silica 0.140 



Soda, ditto 0.640 



Phosphoric Acid, combined 



with Lime and Ox. of Iron . . 0.651 0.060 



Sulphuric Acid and Gypsum. . 0.011 0.027 



Chlorine in common Salt 0.010 0.036 



Carbonic Acid united to the 



Lime 0.080 



Humic Acid 0.978 1.304 



Insoluble Humus 0.540 1.072 



Organic Substances containing 



Nitrogen 1.108 1.011 



" Of these soils, the first had been cropped for 160 years 

 successively, without either manure or naked fallow. The 

 second was a virgin soil, and celebrated for its fertility. 

 The third had been unmanured for twelve years, during the 

 last nine of which it had been cropped with beans, barley, 

 potatoes, winter barley and red clover, clover, winter barley, 

 wheat, oats, naked fallow." Johnston, 



Depth of soil its importance. 



If 50 be assumed as the value of a given soil when it is six 

 inches deep, its value when of different depths will be as 

 follows : 



