DRAINAGE 



163 



of Agriculture Bureau of Soils and the Utah Agricultural 

 Experiment Station cooperating. By the end of 1903, 

 5,651,776 cubic feet, or 51.8 per cent, of the water added to 

 the tract came out through the drains. This water carried 



Table XVII. Alkali Salts Removed by Drainage During 

 Three Years. Swan Tract Near Salt Lake City 



Month 



1902 

 September 

 October . . 

 November 

 December 



1903 

 January. . 

 February. 

 March . . 



April 



May 



June 



July 



August . . . 

 September 

 October . . 

 November 

 December 



1904 

 January. . 

 February. 

 March . . . 



April 



May 



June 



July 



August. . . 

 September 



Total 



Water Added per Acre 



Rain 



and 



Snow 



(Acre inches) 



I. 18 

 I-I5 



OI 



94 

 9i 



77 

 97 

 73 

 25 



X 1 

 60 



25 

 14 



13.21 



Total 

 (Acre inches) 



I .96 

 6.47 

 I. 18 

 1. 1.5 



01 

 94 

 9i 

 77 

 18 



38 

 98 

 58 



17 

 42 



87 



28 



9 



5 



11 



14 

 16 



1.49 

 2.06 

 1 . 29 

 1 . 76 

 2.63 



4-55 

 11.66 



13-35 

 5-6 5 



123.69 



Salts 

 Added in 

 Irrigation 



Water 



(Pounds per 



acre) 



696. I 

 2,288.0 



1,858 



I,6S5 

 4,138 

 5,192 

 5,754 

 859 

 i,378 

 99 



533 



732 



458 



625 



938 



i,5i3 



3,939 



4,692 



1,960 



45,572 



Salt in 



Drainage 



Water 



(Pounds per 



acre) 



3,805 

 4,878 

 8,845 

 4,695 



9,78o 



5,370 



14,768 



663 



14,178 



8,630 



13,912 



30,544 



41,353 



2I,C25 



3J59 

 1,099 



473 

 11,891 



13,049 



9,558 



i,537 



787 



9,634 



17,776 



14,480 



265,889 223,586 



Net Salts 



Lost from 



Soil 



(Pounds 



per acre) 



2,583 

 8,845 

 4,695 



9,780 

 5,370 



14,768 

 663 



12,320 



6,975 



9,774 



25,352 



35,599 



20,166 



1,781 



1,000 



60 



11,159 



12,591 



8,933 



599 



-726 



5,605 

 13,084 

 12,520 



