No. 4.] 



BARNYARD MANURE. 



307 



examine the following table, which classifies the principal 

 kinds of manures : — 



Entire, 



Barnyard manure 

 Other wastes, 



Composts, 



r 



Manures, . < 



Partial, 



Mixed, 



Concentrated, . 



Nitrogen, 



Potash, 



Phosphoric acid, 



Lime, 



Oil cake. 

 Malt germs. 

 Wash waters. 

 Sewage, etc. 



Various. 



Human excrements. 



Guano. 



Various ashes. 



Nitrate of soda. 

 Sulfate of ammonia. 

 Ground meat. 

 Ground tish, etc. 



Muriate of potash. 

 Sulfate of potash, etc. 



Raw phosphates. 

 Superphosphates. 



Various lime wastes. 



While many valuable manurial substances are mentioned 

 in the column at the right, ouly the first, barnyard manure, 

 contains all the elements of fertility, and at the same time 

 the power to improve the soil mechanically. This is why it 

 is called the " entire " manure. 



Barnyard manure deserves such a name more than any 

 other manure, but farmers are often sadlj^ misled by such a 

 designation ; for it is supposed that, if this " entire" manure 

 is applied to the fields, no other manuring can be necessary. 

 This designation means simply that every one of the require- 

 ments of a manure is found in barnyard manure, to a certain 

 degree. But this degree is unfortunately very small except 

 in one particular. It ])rings into the soil a large quantity 

 of organic matter, which forms humus. This increases the 

 power of the soil to attract and retain moisture, makes it 

 more porous, promoting aeration and fermentation and the 

 bringing of all plant food into forms available for the crops. 

 For clayey or heavy soils it is of greatest value, and of least 

 on light and porous soils. Herein lies the chief value of 

 barnyard manure. 



The analysis of a good half-rotted barnyard manure 

 gives : — 



