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 ? 



