man neglects his part. The factory needs steel. How is it secured? 

 Iron ore is buried deep in the mountain, coal is hidden below the sur- 

 face, lime-rock forms a portion of the crust of the globe, but when 

 brought together in the right proportion in the blast furnace, iron is 

 reduced to an available form for another process, and so on until the 

 product is completed. Without man's interven- 

 tion, the component elements that are finally 

 resolved into a cambric needle would sleep on 

 until the last day of eter- 

 V nity. Thus it is with the 



story of the fertility of 

 \ / the soil. 



A Deep Seed-Bed 

 (Well Ventilated] 



Medium Seed-Bed 

 [Partly Ventilated] 



Shallow Seed-Bed 

 [Not Ventilated] 



The Above Illustrates the Great Value of a Thoroughly-Made Deep Seed-Bed 



The story of the many complex changes and combinations that take 

 place between the elements and substances is too confusing for the busy 

 farmer to master. He is interested only in what to do to bring about 

 the best results. 



Most soil contains an abundance of potassium, but it may be locked 

 up in particles of granite, feldspar, alumina or clay, but it is made avail- 

 able by applying powdered lime-rock to the soil. 



Phosphorus may exist in abundance, but is not in the right form to 

 use until it has been transformed into phosphoric acid by the action of 

 acids resulting from the decaying of manures or organic materials of 

 some kind or by the action of other acids. 



Elements may exist in abundance, but are not made into compounds 

 to be used by plants until the various elements are brought together by 

 stirring and tilling the soil, thereby changing the position of the soil 

 particles containing the chemicals. 



