220 Chlorine and Plant Growth [418 
crease followed where NaCl was superimposed upon the usual 
complete ration. 
For the greenhouse cultures in Miami silt loam, fifteen or 
twenty kilograms of air-dry soil were employed, in cypress 
boxes, the salts being added as in the case of the sand cul- 
tures. The total application of salts approximated from 0.06 
to 0.15 per cent. of the dry weight of the soil. 
The sugar beet produced 50 per cent. more dry substance 
(root) when chlorine was included with the usual salt ration 
than when the ration without chlorine was used. The 
glucose content of the root was increased somewhat, percen- 
tagely on the basis of dry weight, but the sucrose content was 
uninfluenced by this treatment. Preliminary experiments 
with the radish indicate that it is little affected by the chlorine 
supply, while the growth of the carrot is stimulated and that 
of the parsnip is depressed as regards content of dry matter 
and percentage of sugars. Similar experiments with the po- 
tato (“ Triumph ” and “ Rural New Yorker ” varieties) gave 
the same dry weights of tubers, whether potassium was sup- 
plied as the chloride or as the sulphate. 
In the field experiments, sugar beet roots showed an increase 
of from 10 to 30 per cent., by weight, where NaCl was ap- 
plied to the soil at the rate of from 260 to 520 pounds per 
acre, as compared with those of the unfertilized plot. The 
glucose content was increased, but that of sucrose was unaf- 
fected by this treatment. 
The potato (“ Triumph ” variety) produced the same yield, 
both of total and marketable tubers, whether supplied with 
potassium as KCl or as K,S0,, in the complete fertilizer 
ration. The addition of NaCl without other salts depressed 
the yield. Another experiment with potato (“Rural New 
Yorker” variety) showed that the starch content and cook- 
ing qualities of the tuber were the same whether potassium 
was supplied as KCl or as K,S0,, in the complete fertilizer. 
Fertilization with NaCl alone gave tubers of lower starch 
content and poor quality. It thus appears that the depress- 
