124 Bulletin 174. 



In the leaves and other green parts. 



S. From what suhstances is the starch tnade f 



From carljon dioxide and water. 



9. Of what elements is starch composed f 

 Of carbon, hydrogen and oxygen. 



10. Into what is the starch changed before it is transported? 

 It is changed into sugar. 



11. What iise is made of the mate rial after it is transported f 

 It is used in the growth of the phmt. 



12. Through what j^ci'ft of the plant does the starch-like material 

 {or " elaborated saj) ") ^x<.s5 f 



It diffuses through the layers of the inner bark. 



13. The root takes in water containing food : Can it use this 

 food material directly in making root-growth f Why f 



No. This food material is taken into the plant in a crude condi- 

 tion, and it must be transported to the leaves where it unites with 

 other materials before it can be used in the growth of the plant. 



14. Why is starch stored w seeds and tidyers f 



To be used by the seedlings or new plants when growth iirst 

 begins, and before the plants are sufficiently developed to take their 

 food from the soil and air. 



15. Is starch stored in twigs in the fall f 

 les. 



16. Are the flowers of peaches, and other early blooming plants, 

 fed from food taken in at the root at the time, or from materials 

 stored in the twig? {Think hov) the potatoes sprout in the bin.) 



From materials stored in the twigs the year before. It is for 

 this reason that the condition and health of the trees this year influ- 

 ence so largely the crop of next year. 



17. Will midching the roots of a peach tree loith strww when the 

 ground is frozen delay the blooming in the spring ? 



No ; because there is food enough in the twigs to feed the blos- 

 soms, and as soon as the weather is warm enough this food is 

 available. 



18. Soil water holds very little food for plants : the roots must 

 take in enormous guantities of water : \ohat becomes of sovie of 

 this water f 



