IRRIGATION TOOLS AND DEVICES 



435 



made in almost any 

 way to suit the farmer, 

 from a simple board, 

 removed when the 

 flow is desired, to 

 elaborate doors 

 hoisted by machinery. 

 In ordinary farm 

 practice, permanent 

 plain wooden or con- 

 crete frames into 

 which the gate may 

 be dropped constitute 

 the most effective 

 device (Fie 140 ) FlG ' 155 ' Ridger in check and basin irri g ation - 

 To guide the water from the lateral ditches on to the 

 land, devices to check or dam the flow are employed. The 



FIG. 154. Ridger in check and basin irriga ion. 



FIG. 156. Furrower in action. 



