18 A UXIT IX AGRICULTURE 



2. Conditions of soil and climate favorable to the production of 



tobacco. 



3. Principal varieties. 



4. Planting and cultivating tobacco: 



(a) Preparation of seed bed. 



(b) Time and manner of sowing tbe seed. 



(c) Preparation of the soil for crop. 



(d) Transplanting. 



(e) Cultivating. 



5. Harvesting tobacco. 



6. Curing and preparation for market. 



7. Insect enemies of tobacco and how to fight them. 



Literature. 



Farmers' Bulletins, Nos. 60, 82, 83, 126, 343. 



B. THE SOIL. 



1. Origin and formation of soil. Ex. 17. 



2. Composition of soil. Exs. 13, 14, 15, and 16. 



3. Soil water. Exs. 17, 19, 20. 



4. Experiments to show how plants absorb water from the soil. 



Exs. 21, 22, 23. 



5. Soil air. Ex. 25. 



6. Soil temperature. Ex. 18, 26. 



7. Soil drainage. Ex. 27. 



8. Meaning and method of tilling the soil. 



Literature. 



King, The Soil, chapters 2, 5, and 6. 



King, Physics of Agriculture. 



Any good Physical Geography, chapter on weathering. 



Farmers' Bulletins, Nos. 187, 245, 257, 266. 



Bureau of Soils, Circular No. 13. 



Year Book, Reprint, No. 169 (1899). 



