IRRIGATION 



133 



Fig. 75. Border method of irrigation. 



trees. A basin is provided around the tree, with a suitable 

 ridge to hold the water, which is then turned in until a suffi- 

 cient amount is applied. 



Border Method. The border method is also similar to 

 the check method in 

 that the land is di- 

 vided into long strips, 

 and the water is 

 turned into these 

 from a ditch at the 

 end or along the bor- 

 der. It is easy to 

 see that by arranging 



these long strips the work necessary in preparing ridges is 

 reduced. 



Furrow Method. The furrow method of applying irri- 

 gation water consists in turning the stream of water into 

 furrows between the rows of intertilled crops. It is more 

 generally employed than any other method, with the excep- 

 tion of flooding from field laterals. The distance between 

 furrows will depend upon the character of the soil. It is 

 customary to provide small openings or pipes in the ridge 

 . > ^iL at the side of the 



supply ditch by 

 which the water may 

 be turned into the 

 furrows. 



Subirrigation. 

 Upon first thought 



Fig. 76. Manner of placing tubes in ditch . -4,,1/J c - -fV.0-*- 



bank for furrow irrigation. (Farmer's Bui. 373, WOUld SCCin indb 



subirrigation, or wa- 

 ter applied to crops from pipes laid beneath the surface, 

 would be an ideal system. This is not the case, as such a 



