MANUFACTURE AND UTILIZATION OF CARBOHYDRATES 171 



Table 59. — Easily Hyduolyzed Carbohydrate in Percentages of Dry Weight 



IN Pear and Chestnut Trees'" 



Pear 



polysaccharides, but not crude fiber, is at a maximun in September 

 and at a minimum in May. Moreover there is a steady increase from 

 May to September and a fairly steady decrease from September to May. 

 Similar data showing the variations in the easily hydrolyzed polysac- 

 charide of 7-year old apple trees are given in Table 60. Here also much 



Table 60. 



-Easily Hydrolyzed Carbohydrate in Percentages of Dry Weight 

 IN 7-YEAR Old Apple Trees^^ 

 (Each figure is the average of analyses from two trees) 



Dormant, 

 Dec. 3 



Leaves 

 falling, 

 Oct. 12 



New growth 



1-year old branches . 

 2-year old branches 

 3-year old branches . 

 4-year old branches . 

 5-year old branches . 



Trunk 



Large roots 



Small roots 



21.36 

 22.13 

 22.41 

 20.44 

 20.43 

 25 . 83 

 29.90 

 29.36 



27.34 

 26.50 

 26.72 

 26.10 



27.88 

 27.28 

 27.96 

 32.02 

 33.88 



