Oct. 4, 1915 
Effect of Alkali Salts in Soils on Crops 
21 
any of the carbonates there was no germination for concentrations above 
4,000 p. p. m. 
COLLEGE LOAM 
The same number of tests, using the same kinds of salts and seeds 
were conducted in College loam as in Greenville soil and sand. The 
KCl 
Ctieck^NoSdit 
• One plant — = 0.1 gm. dry matter . 
Fig. 13.—Diagram showing the number of wheat plants up and dry matter produced in 16 days on College 
loam with calcium chlorid, magnesium chlorid. and potassium chlorid in different combinations and 
concentrations. 
wooppm. 1000 ppm 6,000 ppm. moo ppm. to, 000 ppm. 
. = One plant — — 0,1 gm. dry matter . 
Fig. 14.—Diagram showing the number of wheat plants up and dry matter produced in 16 days on College 
loam with potassium nitrate, magnesium nitrate, and sodium nitrate in different combinations and 
concentrations. 
results are shown in figures 12, 13, 14, 15, and 16. These results agree 
so completely with those found for the Greenville soil that individual 
comment seems unnecessary. 
