THE KINDS OF PLANTS 115 



GENERAL REVIEW QUESTIONS 



1. What is a cotyledon? A plumule? Acaulicle? 



2. Describe a seed-tester. 



3. Why is the best the cheapest in seeds ? In fertilizers ? 



4. Explain how a plant gets food from the ground. 



5. What does a leaf do with the food that comes from the roots ? 



6. Describe various ways of growing plants. 



7. What is the earliest loam ? If soil holds water poorly, how can 

 it be improved ? How can a soil be kept from puddling ? How 

 sweetened if it is sour? 



8. Tell how to prevent soil from drying out on top. 



9. What chemical elements do we supply in fertilizers ? What 

 special one do the legumes put in the ground ? Which one do plants 

 take from the air ? 



10. What is humus, and by what means do you intend to increase 

 it in your soil ? 



11. What are hardy plants ? Tender plants ? 



12. What is a herbaceous perennial ? 



13. How can you lengthen your garden season ? 



