Oct. 4, 19x5 
Effect of Alkali Salts in Soils on Crops 
25 
solution. The glasses were then covered with paraffined paper which 
was bent over the edges and held in place by rubber bands. New Zealand 
wheat was germinated between moist filter papers until its roots were 
about half an inch long, when 10 seedlings to each glass were placed in 
MQoppm. 
zoooppm. e,ooo ppm 
iQQoppm,. 
k loooppm. 
• 5 = One plant. — — 0.1 gm. dry matter. 
Fxo. si.—Diagram showing the number of alfalfa plants up and dry matter produced in 21 days on College 
loam with sodium sulphate, sodium carbonate, and sodium chlorid in different combinations and con¬ 
centrations. 
Cha<X§)NoS»lt 
. — One plant, — = 0.1 gm. dry matter. 
Fig. 22.— Diagram showing the number of Canada field-pea plants up and dry matter produced in 21 
days on Greenville loam with sodium chlorid, sodium sulphate, and sodium carbonate in different com¬ 
binations and concentrations. 
holes in the paraffined paper, so that their roots grew down into the 
solutions. 
The loss of water due to transpiration was made up every day or two. 
The glasses were arranged in the triangular diagram as in the experi¬ 
ments with soils, which have already been discussed. In each test the 
