24 
Journal of Agricultural Research 
Vol. V, No. i 
sugar beets, (6) alfalfa, and (7) Canada field peas. It may be that after 
the crops get a good start their resistance would not be in just this 
order; but in the percentage of seeds germinated this order seems to hold. 
Barley was able to withstand about twice as much alkali as field peas. 
Ml ci 
ChecK^NoSalt 
6.000 ppm. xoooppm. s.oooppm 9000 ppm.. w.oooppni. 
• » One plant. — — 0.1 gm. dry matter. 
Fig. 19. —Diagram showing the number of oat plants up and dry matter produced in 21 days on Green¬ 
ville loam with sodium sulphate, sodium carbonate, and sodium chlorid in different combinations and 
concentrations. 
xoooppm. C0 * 2,000ppm: zoooppm. Aoooppm. xoooppm. 
Chea^NoSott 
eoooppm xoooppm. xoooppm 9.000 pp pi 10.000 ppm 
* = One plant — « 0.1 gm. dry matter. 
Fig. 20.—Diagram showing the number of sugar-beet plants up and dry matter produced in 21 days on 
Greenville loam with sodium sulphate, sodium carbonate, and sodium chlorid in different combinations 
and concentrations. 
SOLUTION CULTURES 
In order to compare the effect of salts in solution cultures with the 
same salts in soils, a number of tests were made with seedlings growing in 
distilled water to which various salts had been added. Glass tumblers 
were filled with water containing the proper quantity of the desired 
