Nov. 27,1916 Effect of Sodium on Absorption of Plant Food 
4i5 
Table VI. — Effect of sodium carbonate on the absorption of nutrients by wheat seedlings 
FIRST SERIES 
Culture No. 
Sodium 
carbonate 
added to 
Elements absorbed from solution (in per¬ 
centage of dry weight of plants). 
nutrient 
solution. 
N. 
KaO. 
Pa 0 5 . 
P. p. m. 
O 
1*4 
*5*6 
1.9 
5 ° 
1. 6 
5*6 
I * 7 
3 . 
IOO 
2. 2 
5* 5 
i *7 
4 . 
200 
2*3 
5*9 
1. 6 
5 .. 
6 . 
3 ° 0 
400 
1.9 
3 - 0 
5- 2 
4. 2 
1.4 
.8 
7 . 
500 
i *3 
2* 5 
• 7 
8. 
I, 000 
1. 4 
1. 0 
•4 
Fig. 8.—Graphs showing the effect of sodium carbonate on the absorption of nutrients by wheat seedlings. 
It has been shown by Le Clerc and Breazeale 1 that there is a very 
marked absorption of potash by sprouting grain seedlings. As potash 
appears to be vitally concerned in the decomposition and translocation 
1 Le Clerc, J. A., and Breazeale, J. F. Translocation of plant food and elaboration of organic plant 
material in wheat seedlings. U. S. Dept. Agr. Bur. Chem. Bui. 138, 32 p., 2 fig. 1911. 
