IMPROVEMENT OF FIELD CROPS 



25 



49. Time and Manner of Blooming. — The student may be required to 

 watch the opening of the wheat flower and the discharge of the pollen. Haj-s has 

 shown that this whole process may take place in less than an hour in spring wheat 

 and that it usually occurs in the early morning hours. 



The opening of wheat flowers. (After Hays.) 



50. Collateral Reading. — Selection and Its Effect on Cultivated Plants. 

 Henry L. De Vilmorin. Experiment Station Record, Vol. XI, pp. 3-19. 



Plant Breeding. Willet M. Hays. Division of Vegetable Physiology and 

 Pathology, U. S. Department of Agriculture, Bui. 29, pp. 7-24. 



The Station for Plant Breeding at Sval'of, Sweden. By David G. Fairchild 

 Experiment Station Record, Vol. XIII, pp. 814-819. 



