Irrigation and Drainage 



139 



Widtsoe and Stewart 1 found that although there was 

 only a slight increase in the percentage sucrose with the 

 water applied up to thirty-five inches, the percentage 

 of carbohydrates increased with increased quantities of 

 water used. Starch and cellulose, therefore, increased 

 with heavier applications. The application of fifty inches 

 in every case decreased the sucrose-content. The purity 

 was lowest with the smallest quantities of water and was 

 highest with intermediate applications up to twenty 



. Percent Sucros* 



Percent PurHy 



FIG. 17. Effect of irrigation at different stages on percentage of 

 sucrose and purity. Utah. 



inches. The percentage of sucrose and the purity were 

 higher in October than in September. 



Investigations made by the author 2 on the effect of 

 irrigation water on the quality, size, and shape of beets 



1 Widtsoe, J. A., and Stewart, R., Utah Exp. Sta., Bui. No. 120. 



2 Harris, F. S., Utah Exp. Sta., Bui No. 156. 



