FERTILIZERS AND FERTILIZING 1 5 



There are, of course, other questions to consider 

 besides the cost and ease of application in connec- 

 tion with the application of lime ; for example, 

 some authorities claim that burnt lime depletes the 

 humus in the soil, and ground lime increases the 

 humus content. Such questions are taken up in 

 books on soils. The question I have been consider- 

 ing is one of the cost." 



COMBINATION HAND CULTIVATOR AND DRILL 



GREAT VALUE OF HUMUS 



Humus in the soil has seldom been taken at its 

 full worth. The mission which it fulfills is second 

 in importance only to that which is fulfilled by the 

 presence of plant food in the soil. Humus is help- 

 ful in keeping soil in proper physical balance, in 

 binding soils that are much prone to blow, in in- 

 creasing the power of soils to absorb and hold 

 moisture and in making more effective the action 

 of fertilizers. 



