146 



M. M. McCooL 



TABLE 12. Experiment with Canada Field Pea. Duration, Twenty-four Days. 



Data for Ten Plants 



Comptition of solution 



Green 

 weight 

 of tops 



(grams) 



Green 

 weight 

 of roots 

 (grams) 



Total 



green 



weight 



(grams) 



Average 

 length 

 of tops 

 (centi- 

 meters) 



Average 

 length 



of roots 

 (centi- 

 meters) 



N/20 CaCh 



N/20 CaCh+N/100 NH4CI. . 

 N/20 CaCl2+N/500 NH4CI. . 

 N/20 CaCl2+N/l,000 NH4CI 

 N/100 CaCl2-f-N/500 NH4CI. 

 N/1,000 CaCl:+N/l,000 NH4CI 

 N/5,000 CaCl2+N/l,000 NH^Cl 



N/30 NH4CI 



N/500 NH4CI 



N/1.000 NH4CI 



N/5,000 NH4CI 



N/100 CaCl, 



Distilled water 



Not 



5.00 

 3.75 



4.25 

 4.15 

 5.72 

 5.26 

 3.55 

 taken 

 1.65 

 1.72 

 1.80 

 5.70 

 1.85 



7.90 

 6.65 

 7.10 

 6.65 

 9.31 

 7.91 

 6.00 



3.45 

 3.62 

 3.90 

 8.90 

 3.61 



11.0 



11.2 



8.5 



11.5 



12.5 



8.0 



2.0 



6.0 



6.5 



6.3 



10.0 



6.0 



12.0 

 12.0 

 12.0 

 12.0 

 10.5 

 10.0 

 6.0 

 



6.0 

 6.0 

 6.5 

 13.0 

 7.0 



HsillH 





^MfiOH 



-■ t 



1 



^fi^^^H 





WBi^HB 



^^^nl 



^HrnlH 





iMHi^^B 



PI^9I 



HH^Wi*~r. ^^"IIhI 





^^^^■H^K^^^^I 



H^}s@^^^^H 



P^Ste \ 







^m^' "^^H 



■tt ' ^1 





^■^t''*^ . ^H 



^^^^^1 



^^^■ld& .tj$ <■ 



■Nil 





vU 









^^bI 



Fig. 4.— Antidotal relations between calcium and ammonium; distilled water as the solvent 



1. N/20 CaCl2 



2. N/20 CaCl2-f-N/500 NH4CI 



3. N/50 CaClo +N/1C00 NH4CI 



4. N/1000 NHiCl 



