408 
Journal of Agricultural Research 
Vol. VII, No. 9 
The cultures were carried on for 21 days in the sunshine at Riverside, 
Cal. At the end of this period the green and dry weights of 100 repre¬ 
sentative plants from each culture pan were determined, and the plants 
were analyzed by official methods for nitrogen, phosphoric acid, and 
potash. The results are given in Tables I, II, III, and IV, the weight in 
each instance being based upon 100 plants. 
SODIUM CHLORlD 
The experimental data obtained with nutrient solutions containing 
graduated amounts of sodium chlorid are given in Table I, and in figure 1 
the quantities of potash, phosphoric acid, and nitrogen contained in 
100 plants are plotted separately against the sodium-chlorid concentra¬ 
tion. The presence of sodium chlorid in the nutrient solution appears to 
> 
< 
► 
0 ' 
-- Tt - : 
\ A/ 
k X 
*2O $ 
I 
r 
* 
* 
* 
t 
6 
A/aC/ /^/-yvc/r/?/£r/vT solc/t/oa/^ 
Fig. 1.—Graphs showing the effect of sodium chlorid in nutrient solutions on the nitrogen, potash, and 
phosphorie-acid content of wheat seedlings. 
diminish very slightly the potash and nitrogen content of the wheat 
plants, but the effect is so small as to be comparable with experimental 
errors. The phosphoric-acid content of the wheat seedlings appears 
to be quite independent of the amount of sodium chlorid in the culture 
solution for the range in concentration here employed. 
The nitrogen, potash, and phosphoric-acid content of the seedling 
wheat plants grown in the presence of sodium chlorid are also expressed 
in Table I in percentage of the dry weight of the plants. The results 
in this form are not as concordant as those already discussed, but lead 
to the same conclusion—namely, that the presence of sodium chlorid in 
culture solutions in graduated concentrations up to 1,000 p.p. m. has 
very little effect upon the total nitrogen, potash, and phosphoric-acid 
content of young wheat plants. 
