METHOD OF IRRIGATION 



199 



which is the mostjargely used method of^ogen_field-flood- 

 ing, is especially adapted to level lands with gentle slopes. 

 By this method, the water is taken out of the main ditches 

 at various intervals, and as it jflows _oyer thejjejdj is dis- 

 tributed property" over the field by small temporary 

 ditches or furrows. These small laterals follow the high 



BB 



FIG. 38. Flooding with aid of canvas dam. 



places of the field, and the water overflowing their banks 

 covers the field. 



For instance, wheat is planted in the usual way, with- 

 out reference to the field ditches which are made after 

 the wheat has germinated and is a few inches high. The 

 small laterals are made with a small horse-plow made for 

 the purpose, or they are made by the irrigator with a hoe. 

 The field ditches of lucern and similar permanent crops, 

 once made, remain from year to year, except that they 

 may be deepened a little from season to season. These 



