286 IOWA ACADEMY OF SCIENCE Vol. XXV, IHlS 



8. Drinkard, A. W., Jr., Fruit Bud Formation and Development: 

 Ann. Rep. Vir. Exp. Sta., 159-205. 1909-1910. 



9. Drinkard, A. AV., Jr., Some Effects on Root Pruning and 

 Stripping on the Formation of Fruit Buds on the Dwarf Apple: Vir. 

 Exp. Sta. Tech. Bull. 5, pp 96-120. 



10. Goff, E. S., The Origin and Early Development of the Flow- 

 ers in the Apple: Rep. Wis. Exp. Sta., 16, pp. 289-303, 1S99. 



11. Goff, E, S., Investigation of Flower Buds: Rep. Wis. Exp. 

 Sta., 17, pp. 266-285, 1900. 



12. Goff, E. S., Investigation of Flower Buds: Rep. Wis. Exp. 

 Sta., 18, pp. 304-316, 1901. 



13. Goff, E. S., Origin and Development of the Apple Blossom: 

 American Gardening, 22, pp. 330, 34 6-347, 19 01. 



14. Gourley, J. H., Studies in Fruit Bud Formation; New Hamp- 

 shire Exp. Sta. Tech. Bull. 9, pp. 1-79, 1915. 



15. Green, W. J., & Ballon, F. H., Orchard Culture: Ohio Agri. 

 Exp. Sta. Bull. 171, pp. 189-210, 1906. 



16. Halsted, B. D., Reserve Food Materials in Buds and Sur- 

 rounding Parts. Mem. Torrey iB'ot. Club. 2, p. 26, 1890. 



17. Hedrick, V. P., A Comparison of Tillage and Sod Mulch in 

 an Apple Orchard: N. Y. Exp. Sta. Bull. 314, pp. 76-132. 1907. 



18. Hedrick, V. P., The Formation of Fruit Buds: Western 

 Hort. 1906, pp. 28-35. 



19. Jost, T. If., Causes of Flower Formation, Lectures on Plant 

 Physiology. Authorized American Translation, pp. 363-365, 1907. 



20. Kraus, E. J., Gross Morphology of the Apple: Part 1. Oregon 

 Agr. Col. Exp. Sta. Res. Bull. 1, 1913. 



21. Kraxis,E. J., A Study of Fruit Buds: Part 2. Ore. Ag. Exp. 

 Sta. Bull. 130, pp. 12-21, 1915. 



22. Kraus, E. J., Fruit Bud Formation Related to Orchard Prac- 

 tice: Proc. Wash. State Hort. Ass'n 12th Ann. Conv., 1916, pp. 24-29. 



23. Lazenby, Wm. R., Development of the Buds in Some of our 

 Common Orchard Fruits: Proc. of Amer. Pom. Soc, 1899, p. 40. 



24. Magness, J. R., The Influence of Summer Pruning on the 

 Bud Development of the Apple: Ore. Exp. Sta. Bull. 139, pp. 46-67, 

 1916. 



25. Morgan, W, M., Studies in the Development of Fruit Buds, 

 An Unpublished Paper Prepared at Cornell Univ. Cited by Drinkard 

 et al., 1902. 



26. Pickering, S. U., & Duke of Bedford, Effect of Grass on 

 Fruit Trees: Woburn Exp. Fruit Farm. Rep. 13, 1911. 



2 7. Picket, B. S., Fruit B'ud Formation: New Hamp. Exp. Sta. 

 Bull. 153, pp. 1-37, 1911. 



28. Picket, B. S., Factors Influencing Formation of Fruit Buds 

 in Apple Trees: Trans. Mass. Hort. Soc. Part 1, pp. 57-72, 1913. 



29. Reany, T., The Application of Nitrogen in Relation to Fruit 

 Bud Formation: Mitt. Deut. Landw. Gessell. Vol. 28, 416-421, 1913. 



30. Russell, E. G., Soil Conditions and Plant Growth, p. 73, 1912. 



