MANURES. 



I^ 



277. ThQ ingredients of all these soils are very well 

 as far down as potash, except that the third has too 

 much oxide of iron. Below that point, important in- 

 gredients are deficient in the second, and almost 

 wholly wanting in the third. If now we look at Pro- 

 fessor Johnstone's analyses of crops below, we shall 

 see why the second soil required manure, and why the 

 third was hopelessly barren. 



TABLE V. 



CROPS. 



278. From an inspection of these analyses, it is 

 reasonable to infer that the first soil would produce 

 any of those crops without manure ; that the second 

 would produce good crops, if manured with some- 

 thing containing potash, soda, and chlorine ; and that 

 the third would be likely to require more manure 

 than the crop would be worth, and might therefore be 

 abandoned as hopeless. The first contains all the 



