i8 



Journal of Agricultural Research 



Five sets of tests were conducted with wheat growing in sand similar 

 to those with the Greenville soil. 



In figure 7 the results for sodium chlorid, sodium sulphate, and sodium 

 carbonate are given. The noticeable thing about these results, as well 



s.oooppm. 

 ChecK^NoSalt 



t.oooppm 



s.oooppm. 



(,.oooppm 



. = One plant. 



loooppm 6.000 ppn 



- = 0.1 gm. dry matter. 



9oooppm 



looooppm 



Fig. 7. — Diagram showing the number of wheat plants up and dry matter produced in 14 days on coarse 

 sand with sodium sulphate, sodium carbonate, and sodium chlorid in different combinations and con- 

 centrations. 



^pooppm. 



j.oopppm. 

 Ctieck^NoSalt 



4.oooppin. 



s.ooopf)n 



6.ooopp.m. 



. = One plant. 



zoooppm. €iOooppm. aoooppnL w.oooppm. 



- = 0.1 gm. dry matter. 



Fig. 8. — Diagram showing the number of wheat plants up and dry matter produced in 14 days on coarse 

 sand with calcium chlorid, magnesium chlorid, and potassium chlorid in different combinations and con, 

 centrations. 



as all those for sand, is that only about half as much salt is required to 

 stop growth in sand as in either the Greenville soil or the College loam. 



The same general relations between the salts are shown here as in 

 the Greenville soil, except that in the sand sodium carbonate is proper- 



