4 
3897 | RELATION OF NUTRIENT SALTS TO TURGOR 4°7 
-and not too unequal quantity of sugar must have preceded the 
‘formation of starch in both cases. 
Fagopyrum, the Japanese buckwheat. The normal culture 
was like that used for Pisum. In the table, which in this case is 
a compilation, the length of the parts is omitted. In relative 
thriftiness in the different solutions the plants agreed quite well 
with those grown by Nobbe”* in his classic work on the plant’s 
need of potassium. The time is measured from the dates when 
the seeds were put in water culture. 
1. Normal. 
After ter 
; 9 days 19 days 33 days 42 days 57 
Stem 2-2.5% 2—2.5% 2.5% 2.5% 2.5-3% 
Root 2% 2% 2% 2% 
2. Distilled H,O. 
, Stem 1.5% 2% 2% 
Root 1.5% 1.5% I-1.5% 
3. Na instead of K. 
Stem 2% 2% 2% 2% 2-2.5% 
Root 1.5% 1.5-2% 1.5% 1.5% 
: 4. Ca(NO 3). replaced by CaSO,. 
Stem 1.5-2% 2% 2% 
Root 1.5% 1.5—2% 
5. Ca(NO,;)2 replaced by NaNO . 
Stem 2-2.5% 2.5% 2.5—-3% 3% 3% 
Root 2% 2% 
6. MgSO, replaced by MgCl, 
Stem 2.5% 2.5% 3% 3-5% 
Root 2% 2-2.5% 2-2.5% 
7- MgSO, replaced by CaSO, 
2.5% 3% 
Root 2-2.5% 2-2.5%? 
8. K,HPO, replaced by K,SO,. 
Stem 2.5% 3-3-5% 3.5% 
Root a. 4 2-2.5% 
With the substitution of MgCl, for MgSO, occurred a small 
increase in. the o osmotic power of the solution, which, however, 
ME. Nobbe, Landw. Versuchsst zg: 360. 
