310 



IRRIGATION PRACTICE 



once a month is ample. Celery is a water-loving crop, 

 although if sufficient is added to keep the soil in a moist 

 condition, the yield is just as well as if excessive quan- 

 tities were added, and the quality is better. 



187. Onions and miscellaneous crops. Onions should 

 be planted in a soil well filled with moisture. A month 

 may then elapse before the first irrigation. This crop may 

 be irrigated either by the furrow or the flooding method. 

 Usually frequent small irrigations are better than infre- 

 quent large ones. In middle summer, when growth is 

 rapid, it may need much water. When the tops fall, irriga- 

 tion should cease. Maturity may be hastened by with- 

 holding water when the crop is half grown. The Utah 

 Station has tested the effect of varying quantities of 

 water on the yield of onions as shown in the following 

 table: 



YIELDS OF ONIONS WITH VARYING QUANTITIES OF IRRIGATION 



WATER 



The law that the yield does not increase in proportion 

 to the water applied holds with onions as with other crops. 



Rhubarb requires frequent irrigations during cutting 

 time. With good wettings in midsummer, the bud-forma- 

 tion for the next year is furthered. 



Tobacco, peanuts and a host of other crops grown in 

 the world may be brought under successful cultivation 



