Oct. 4, 191S 



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 



toooppm. 



Mgc;. 



tpooppm. 



zoooppm. 

 Cneck^NoSalt 



Aoooppm. 



s.oooppm. 



Mooppm xoooppm e,oooppm. %ooop.pm.. w.oooppm. 



. = One plant. — = O.I 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. 



KNO, loooppm^t^^i zfiooppm. s.oooppm. 



ChecK^NoSalt 



4.oooppm 



ioooppm. 



lo.oooppm. 



Mooppm loooppm. B.oooppM 



. = 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 sodiimi 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. 



