QUESTIONS. 289 



CHAPTER XX. 679. How arc plants used in the arts divided ? 680. 

 What is the only plant cultivated for its oil in this country ? 681. In 

 what climates does flax succeed best ? The soils best suited to it ? 



682. How does the object of raising flax determine the soil for it ? 



683. What manures are good for it ? 684. What preparation of the 

 land ? 685. The quantity of seed to be sown ? 686. Effect of quantity 

 of seed on the fibre ? Kind of fibre most valuable ? 687. How is the 

 seed sown ? What care is needed after the flax is up ? 688. How is 

 the plant gathered ? 689. If allowed to ripen seed how much may be 

 expected per acre ? 690. What is said of hemp? 691. The soil 

 best adapted to hemp ? 692. How is it sown ? When and how is it 

 harvested ? 693. What other plants are used in our manufacturing 

 industries ? 694. What are the varieties of osier willows ? 695. What 

 soils are adapted to the willow ? 696. How is the land prepared ? 

 697. How are the cuttings set ? What attention is needed ? 698. The 

 soil best suited to broomcorn ? How is the seed sown ? 699. When 

 and how is it harvested ? 700. What are the varieties of the hop ? 

 701. The soil best adapted to it? 702. What manures maybe used? 

 703. How is the hop propagated ? 704. What is said of the poles to 

 be used ? 705. When are hops gathered and how ? 706. How is 

 tobacco cultivated ? 707. By what is the plant attacked ? 708. When 

 is it topped ? 709. When gathered and how ? 



CHAPTER XXI. 710. Rotation of crops ? Give an example. Object 

 of rotation ? The reason for rotation ? First important principle in 

 the rotation of crops ? The second? The third ? Fourth? 711. Is 

 the order of rotation important ? 712. What may be saved by rotation ? 

 How must the succession be arranged ? Show, by an example on the 

 black-board, how this may be done. 713. How may the rotation be 

 made still longer ? How may time be saved ? How often should the 

 ground be moved ? Order of ploughing ? Give reasons for the seven 

 years course ? Substances most needed for the restoration of fertility ? 

 Best manures ? 714. On clover ? Give an example of successful use 

 of gypsum ? 715. A fallow ? When may a field lie fallow ? Show 

 how it should be managed ? 716. Weathering ? Its uses ? Where 

 are these salts ? 717. Who have allowed thoir fields to be fallow ? 

 What has rendered it less necessary ? What substitute ? Why should 

 the rotation vary with the soil ? 718. How is a farmer to know the 

 best course of rotation ? Should it vary with the object the farmer has 

 in view ? 719. Give, upon the black-board, the 1st course laid down, 

 with the reasons. 2d. 3d. 4th. 5th. Give a longer course, and the 

 reasons. 720. Norfolk rotation? Give the favorite French course, 



