Field Irrigation ~by Flooding 



343 



water must be led across it. Where help is scarce 

 and the price of the crop small, it is often the prac- 

 tice to enter the field with the plow just before the 

 water is to be applied, and form the furrows then. 

 In watering by this method, the aim is to throw 



4, 



Fig. 86. Flooding field on steep slopes. (drunsky.) 



the water over the lower edge of the furrow in a 

 continuous sheet or else at short intervals, to flow 

 down the slope until the portion of the field within 

 reach has received what is needed. To do this, 

 canvas dams or temporary earth dams are used, as 



