1897 | RELATION OF NUTRIENT SALTS TO TURGOR 495 
5. Na instead of Ca. 
. \ length te a iT a dead. 
epee turgor 25% 2.5% 2.5-3 % 
length — , toa rocm dead. 
sain 1 turgor 2% 24% 2% 
The leaves of 1, 3, and 5 were tested January 18, and all 
plasmolyzed in 3.5 per cent. The plants in the complete cul- 
ture were of unhealthy appearance January 27, the leaves being 
spotted with brown dry flecks, and the roots short and bushy. 
Culture 3 showed the same symptoms in milder form. The 
solutions were poured off and replaced with others prepared 
from fresh salts (see below under Pisum for composition), and 
a better condition ensued. The seedlings in NO,-free solution 
bore very empty and colorless roots, which soon rotted; while 
those deprived of Ca, though dwarfed, were rugged and hardy 
in appearance. The power of the Leguminose to endure want 
of K better than that of Ca‘ was well illustrated by both spe- 
cies of Phaseolus. 
Pisum sativum. Placed in solution March 13. The normal 
solution used in this and most of the ere experiments was: 
~ - - - - - 0.006 #q. 
= zs = - - - 0.0025 #q. 
saewalt a a . é . - 0.0015 #&q. 
AE he Ee umes ag 
With a trace of ferric chloride in the jars, as needed. 
The course of turgor and growth was: 
1. Normal. 
March 27 April 13 May 4 
; length uae 37 
Ste 
om turgor 2.5% 3% 2.5% 
S$ length 29 26 
— | turgor 2% 1.5-2% 2% 
2. Distilled water. 
length 22" 30™ 
s 
ns } turgor 2% 26 2% 
eat | length Yo 25 
Root} turgor 2% I-1.5% 1.5% 
e a emp a. E. H. elt ff = Die A f; k Een AToh Pome «9 3 Boden durch 
Landw. Jahrb. 23 : 1009. 
