124: Bulletin 174. 



Ill the leaves and other green parts. 



8. From what suhstaiices is the starch made? 

 From carbon dioxide and water. 



9. Of luhat elements is starch comjyosedf 

 Of carbon, hydrogen and oxygen. 



10. Into lohat is the starch changed hefore it is transported? 

 It is clian^ed into sns^ar. 



11. ]yhat use is made of the material after it is transported? 

 It is used in the growth of the plant. 



12. Through lohat 2?art of the i)layit does the starch-like material 

 {or " elaborated sap '^)pass ? 



It diffuses through the layers of the inner bark. 



13. The root tahes in loater containing food : Can it use this 

 food material directly in malting root-groioth ? Why? 



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 in seeds and t\d)ers ? 



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

 begins, and before the plants are sufticientl}^ developed to take their 

 food from the soil and air. 



15. Is starch stored in twigs in the fall ? 

 Yes. 



16. A^'e thefloioers of peaches^ and other early hlooming plants^ 

 fed from food taken in at the root at the tinne^ or frotn materials 

 stored in the twig? {Thinlz how the potatoes sprout in the hin.) 



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

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

 ence so largely the crop of next year. 



17. Will mulching the roots of a peach tree with straw lohen the 

 ground is frozen delay the hlooming 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 loater holds very little food for plants: thf roots must 

 tahe in enormous qnantities of water : what hecom,es of some of 

 this water ? 



