390 



Irrigation and Drainage 



|Fig. 118. Irrigation of melons and cucumbers by Chinese at San Bernardino. 



long and 10 inches deep, the soil at 1 is quickly 

 turned over to 2, to form a dam in the stream, 

 thus allowing the water to flow between the two 

 lower rows until that furrow has been filled to a 

 sufficient height. The soil from 3 is then turned 

 over to 1, thus closing 1 and allowing the water to 

 enter 3. When 3 is full the soil from 4 is brought 

 back to 5, which turns the stream in there. When 

 4 has received enough, the water is turned into 6 

 by moving the soil from there to 4. In this manner 

 the irrigator advances from row to row until both 

 sides of the whole bed have been watered. 



In other cases, small or large areas of garden 

 plants are enclosed in small, shallow basins by throw- 



