34 ELEMENTS OF AGRICULTURE 



Find the stamens, anthers, pistils, stigmas, styles and ovaries of 

 each. Make drawings of each. Compare the abundance of pollen in 

 a self-fertilized plant, such as wheat, rice, oats, with its abundance 

 in the cross-fertilized plants, as corn or rye. Why this difference? 



7. Pollen Grains. 



Materials. Same as for No. 6, and a compound microscope. 

 Examine pollen grains of several crops with a microscope, using 

 a one-sixth-inch objective (X about 400). Make a drawing of each kind. 



8. Hybridization. 



Materials. Growing plants about to bloom. 



Let each student cross-fertilize several flowers of any plants, pre- 

 ferably crops. If possible, have the seed from each cross saved and 

 planted. (See p. 13.) 



9. Seed Selection. 



Materials. A field of any crop approaching maturity. Each student 

 to select ten plants for seed, giving reasons for the choice. 



10. The Improvement of Some Crop. 



Let each student choose some plant which he is to try to improve 

 during the next year: An ear-row test of corn, hill-row test of potatoes, 

 selection of carnations, or some other plant. If the school has land 

 available, this may be done on the experimental grounds, or students 

 may do the work at home. 



COLLATERAL READING 



Production of Good Seed Corn, by C. P. Hartley. Farmers' Bulletin 

 No. 229. (Each member of the class should have a copy.) 



A Successful Hog and Seed-corn Farm, by W. J. Spillman. Farm- 

 ers' Bulletin No. 272, p. 12. 



Corn-breeding Work at the Experiment Stations, by J. I. Shulte. 

 Yearbook, 1906, pp. 279-294. 



New Citrus and Pineapple Productions of the Department of Agri- 

 culture, by H. J. Webber. Yearbook, 1906, pp. 329-346. 



New Tobacco Varieties, by A. D. Shamel. Yearbook, 1906, pp. 

 387-404. 



