SOIL PHYSICS, CHEMISTRY AND MICROBIOLOGY 



1743 



Table I. — Effect of the osmotic pressure oj the soil solution on the coef- 

 ficient of transpiration of wheat plants [average of the two years 1914 

 and 1915. 



Salts used 



Sodium chloride. . . 



» sulphate . . 



» nitrate . . . 



Aminonium chloride 



» sulphate. 



» nitrate . 



Magnesium chloride . 



» sulphate 



Calcium chloride . . 



Normal 

 I soil 

 solution 



3656 



Mean for all salts 



3656 



Coefficients of transpiration 



Abnormal soil solutions, osmotic pressure 



359 5 

 364 -3 

 352.0 



329.9 



331-4 

 336.0 



350.4 

 366.9 



347-7 



348.6 



346.6 



335-7 

 323-1 

 308.3 

 304.6 



358.8 

 360.0 

 329.6 



333-3 



Table II. — Effect oj tlie osmotic pressure of tJie soil solution on the vield 

 and nitrogen content of wlreat {average of i lie two years 191 4 and 1915)- 



