Oct. 4, 1915 
Effect of Alkali Salts in Soils on Crops 
27 
decreased as the concentration of the solution increased, there being an 
average of 9.7 plants to each glass alive where no salt was added to the 
culture, but only 3.8 plants alive with 10,000 p. p. m. of salt. 
ChecK^NoSatt 
e,ooopp.m. zoooppm. e,oooppm. 9,ooop.pm.. to.ooop.pm. 
. = One plant . — — 0.1 gm. dry matter; tops \ = 0.1 gm. dry matter; roots. 
Fig, 24.—Diagram showing the number of wheat seedlings alive and dry matter produced in tops and roots 
in 21 days with solutions of potassium chlorid, calcium chlorid, and magnesium chlorid in different com¬ 
binations and concentrations. 
There was a corresponding decrease in number of leaves per plant , 
height of plants, length of roots, weight of tops, and weight of roots as 
the concentration of salts increased. The weight of roots, however, was 
not so much affected as some of the other results. In the cultures in 
Check^) No Salt 
e.oooppm. zoooppm. 6 . oooppm. 
. = One plant. ~ = 0.1 gm. dry matter; tops 
9.000 ppraj to.oooppm. 
| — 0.1 gm. dry matter; roots . 
Fig. 25.—Diagram showing the number of wheat seedlings alive and dry matter produced in tops and 
roots in 21 days with solutions of sodium nitrate, potassium nitrate, and magnesium nitrate in different 
combinations and concentrations. 
which no salts were added, the height of plants, the length of roots, and 
the dry matter produced were not so great as in the cultures containing 
salts in low concentrations. 
