»544 Annual Report Agricultural Experiment Station 



TABLE XIX. — Continued 



the latter which contained one-third more black alkali ; but it is to 

 be noted that the first contains twice as much sodium chloride. The 

 failure in 6825 and 6826 as compared with 6824 was due probably 

 to a hard condition of the soil intensified by the deflocculating effect 

 of the black alkali so that water did not penetrate well when the soil 

 was irrigated — so-called slick land. 



In the case of cotton soils 6752, 6753, and 6754 white alkali is 

 the limiting salt but there is no apparent explanation for the marked 

 difference in growth between 6753 and 6754. Teparies are appar- 

 ently quite sensitive to soluble chlorides. Asparagus, which is 

 ordinarily a salt-loving plant, was affected by black alkali in the 

 presence of the rather excessive amount of white alkali. The series 

 of barley soils 6004, 6005, 6006, and 6007 seem to yield no conclusive 

 evidence. The injury thruout was ])robably due to a tight soil in- 

 tensified by the varying amounts of black alkali present which 

 prevented it from taking sufficient water. The feterita and milo 

 series were taken from sandy ^oils at the University Farm, which 

 are discussed in the section of this report dealing with alkali studies. 

 This soil is particularly favorable for study of black alkali tolerance, 

 since the sodium chloride is uniformly low, the white alkali being 



