382 THE PRINCIPLES OF SOIL MANAGEMENT 



The amounts and frequency with which farm manure 

 should be applied must depend, to some extent, upon the 

 nature of the farming and upon the character of the soil. 

 Farm manure tends to render all soils more porous and 



Fig. 107. The wrong way to distribute manure. There is large loss by decay 

 and an uneven growth of crop. 



light. A naturally light soil may be rendered less pro- 

 ductive by the application of heavy dressings of manure; 

 particularly in a dry climate is this the case. In regions 

 where so-called "dry farming" is practiced, the return 

 of organic matter to the soil is a great problem, on 

 account of the difficulty in accomplishing its decay 



