LESSON LV 

 IRRIGATION FARMING 



Irrigation is the application of water to the land in 

 addition to that received by the fall of rain and snow. 

 While irrigation is generally confined to arid and semi- 

 arid regions, yet to a limited extent it is practiced in 

 humid regions. An arid region is usually defined as 

 a part of the country in which the total precipitation 

 for the year amounts to less than fifteen inches of water. 

 A region having an annual precipitation of from fifteen 

 to twenty-five inches is regarded as semiarid land. The 

 term "precipitation" includes rain and snow, ten inches 

 of snow being equal, on an average, to one inch of rain. 



