Toxicity of Various Cations 209 



TABLE 8. Influence of Previous Conditions on Toxicity 



Distilled water 



Full nutrient solution 



Tap water 



NaCl 



NaCl 



NaCl 



N/10 dead 



N/15 dead 



N/20 wilting (slight growth) 



N/50 good 



N/10 dead 

 N/15 dying 

 N/20 growing 



N/10 dead 

 N/15 dying 

 N/20 growing 



KCl 



KCl 



KCl 



N/5 dead 

 N/7 dead 

 N/10 growing 



N/5 dead 



N/7 dead (slight growth) 



N/10 growing 



N/5 dead 



N/7 dead (slight growth) 



N/10 growing 



NH4CI 



NH4CI 



NHiCl 



N/20 dead 

 N/40 dying 

 N/70 growing 



N/20 dead 



N/25 tips of leaves dying 



N/50 growing 



N/10 dead 



N/25 growing — injured 



N/50 growing 



CaCl2 



CaCl2 



CaCh 



N/3 dead 

 N/5 growing 

 N/10 good 



N/3 dead 

 N/5 growing 

 N/10 good 



N/3 dead 

 N/5 growing 

 N/10 good 



MgCl2 



MgCh 



MgCl2 



N/10 dead 

 N/20 dead 

 N/50 good 



N/10 dead 

 N/20 dying 

 N/40 growing 



N/10 dead 

 N/20 dying 

 N/40 growing 



MnCl2 



MnCh 



MnCl2 



N/25 dead 

 N/50 dead 

 N/100 dying 

 N/200 slight growth 



N/25 dead 



N/50 tops dead, roots 



medium 

 N/75 tops injured, roots 



medium 

 N/100 tops injured, roots 



medium 



N/2o dead 



N/75 tops dead, roots alive 



N/100 tops slight growth, 



dead; roots alive 

 N/200 tops not injured 



BaCh 



BaCh 



BaClj 



N/100 dead 

 N/300 dead 

 N/500 slight growth 



N/100 dead 



N/300 slight growth 



N/500 gro-w-ing 



N/100 dead 

 N/200 dead 

 N/300 slight growth 

 N/500 growing 



