154 



IRRIGATION. 



moved daily to a fresli portion. There are various kinds 

 of hurdles used for this purpose. A light hurdle may be 

 made of split poles or laths, three inches in diameter for 

 the uprights, and an inch and a half in diameter for the 

 bars. The upright ends project below for a foot, and are 

 pointed. By driving the pointed ends into the ground 

 with a wooden mallet, the hurdles are kept in place, and 



Fig. 79. LOOSE HURDLE. 



standing end to end, form a light portable fence, which 

 can be quickly taken down and set up again. This is 

 seen at fig. 78. Another easily made and portable hur 

 dle consists of a pole or scantling, 10 feet long, bored 

 with holes, alternately in opposite directions, and 12 

 inches apart. Stakes five feet long are put through these 

 holes, making a hurdle with a cross-section like the let- 



