Antitoxic Action of Certain Bases 



147 



TABLE 13. Experiment with Canada Field Pea. Duration, Thirty Days. Data 



FOR Ten Plants 



Composition of solution 



Green weight 

 of roots 



(grams) 



Average length 



of tops 

 (centimeters) 



Average length 



of roots 



(centimeters) 



N/100 CaCl2+N/l,000 NH4CI 

 N/100 CaCl2+N/2,000 NH4CI 

 N/100 CaCl2+N/3,000 NH4CI 

 N/100 CaCl2+ N/4,000 NH4CI 



N/3ONH4CI 



N/500 NH4CI 



N/2,000 NH4CI 



N/3,000 NH4CI 



N/4,000 NH4CI 



N/100 CaCl2 



Distilled water 



2.00 

 2.00 

 2.54 

 2.03 

 

 Weight not 

 taken 

 1.63 

 1.67 

 1.70 

 2.85 

 1.80 



9.0 

 11.0 

 10.0 

 10.0 



2.0 



2.0 

 4.0 

 4.0 

 4.0 

 13.0 

 7.0 



8.0 

 10.0 

 10.0 



9.5 







Slight 

 3.0 

 3.0 

 4.0 

 8.0 

 5.0 



TABLE 14. 



Experiment with Wheat. Duration, Thirty Days. 

 Plants 



Data for Ten 



Composition of solution 



N/100 CaCl2+N/l,000 NH4CI 

 N/100 CaCl2+N/2,000 NH4CI 

 N/100 CaCl2+N/3,000 NH4CI 

 N/100 CaCl2+N/4,000 NH4CI 



N/2,000 NH4CI 



N/3,000 NH4CI 



N/4,000 NH4CI 



N/100 CaCl2 



Distilled water 



Total 



^reen weight 



of plants 



(grams) 



0.95 

 1.20 

 1.40 

 1.15 

 1.16 

 1.10 

 1.16 

 2.88 

 1.71 



Average length 



of tops 

 (centimeters) 



12.5 

 15.0 

 15.5 

 13.0 

 9.0 

 10.0 

 11.0 

 17.5 

 10.5 



Average length 



of roots 



(centimeters) 



12.5 



15.0 



12.5 



10.0 



Very slight 



Very slight 



8.0 



27.5 



17.5 



The relations of calcium and ammonium in the complex nutrient 

 solution have also been followed. The nutrient solution was of the 

 same composition as that employed in the first series in which the calcium 

 and magnesium relations were studied. 



An examination of the data set forth in Table 15 shows that in this 

 solution N/25 NH4CI is very injurious to the tops of seedlings, and 



