Physiological knowledge of the tea plant. 293 



(3) Experiments with full grown tea plants. 



(<?) On April 17. tea plants of the college farm about 

 ten years old were deprived of all the old leaves, leaving only 

 small buds. The leaves developed from the buds in full day 

 light, were analyzed on May 16. 



In 100 parts of dry matter. 





Stem bark. 



Buds. 



Leaves. 





April 17. 



May 16 

 old leaves 

 taken off 

 on April. 



April 17. 



May 16 

 old leaves 

 deprived 

 on April 

 20. 



May 16 

 normal 

 growth. 





1.09 



1.23 



5-3 



5-94 



5-77 



Albuminoid nitrogen 



1.06 



i'5 



4.02 



4.60 



444 



Theine nitrogen 



0.024 



0.045 



0.763 



0.797 



0.723 



Nitrogen in other forms ... 



0.0 1 



0.03 



o.53 



o-S4 



0.61 





0.09 



0.17 



2.89 



3.02 



2 74 



In 100 parts of total nitrogen. 



Total nitrogen 



100.0 



100.0 



100.0 



100.0 



100.0 



Albuminoid nitrogen 



97.2 



93-5 



75-7 



77-4 



77.0 



Theine nitrogen 



2.2 



37 



14.4 



13-4 



12.5 



Nitrogen in other forms ... 



0.6 



2.8 



9.9 



9.2 



"10.5 



(b) On May 1. tea plants about fifteen years old were 

 deprived of the old leaves. Some of these plants were covered 

 with a box to shutout day light while others remained uncovered 



In 100 parts of dry matter. 







Leaves 



Leaves 





Buds 



May 1 6 



May 16 





May 1. 



day light. 



dark. 



Total nitrogen. 



5-47 



5-54 



5-31 



Albuminoid nitrogen. 



4.42 



4.18 



4.01 



Theine nitrogen. 



0.562 



0.634 



I.032 



Nitrogen in other forms. 



0.49 



0-73 



0.27 



(Theine). 



2.13 



2.40 



3-9 1 



