164 LIST OF LITERATURE 



Heinicke, A. J., Reuther, W. and Cain, J. C. (1942). Influence of 



boron application on preharvest drop of Mcintosh apples. Proc. 

 Amer. Soc. Hort. Sci. 40, 31-4. 

 Heintze, S. G. (1938). Readily soluble manganese of soils and marsh 



spot of peas. J. Agric. Sci. 28, 175-86. 

 Heller, V. G.jand Penquite, R. (1937). Factors producing and pre- 

 venting perosis in chickens. Poult. Sci. 16, 243—6. 

 Henze, M. (1911). Untersuchungen iiber dans Blut der Ascidien. I. 



Mitteilung. Die Vanadiumverbindung der Blutkorperchen. Hoppe- 



Seyl.'Z. 72, 494-501. 

 Hewitt, E. J. (1945). 'Marsh spot' in beans. Nature, 155, 22-3. 

 Hill, H. and Grant, E. P. (1935). The growth of turnips in artificial 



culture. Sci. Agric. 15, 652-9. 

 Hoagland, D. R. (1941). Water culture experiments on molybdenum 



and copper deficiencies of fruit trees. Proc. Amer. Soc. Hort. Sci. 



38, 8-12. 

 Hoagland, D. R. and Arnon, D. I. (1938). The water-culture method for 



growing plants without soil. Circ. Univ. Calif. Coll. Agric. no. 



347. 

 Hoagland, D. R., Chandler, W. H. and Hibbard, P. L. (1936). 



Little-leaf or rosette of fruit trees. V. Effect of zinc on the growth 



of plants of various types in controlled soil and water culture 



experiments. Proc. Amer. Soc. Hort. Sci. 1935, 33, 131-41. 

 Hoagland, D. R., Chandler, W. H. and Stout, P. R. (1937). Little- 

 leaf or rosette of fruit trees. VI. Further experiments bearing on 



the cause of the disease. Proc. Amer. Soc. Hort. Sci. 1936, 34, 210-12. 

 Hogg, J. (The Ettrick Shepherd) (1831). Remarks on certain diseases of 



sheep. Quart. J. Agric. 2, 697-706 (and note by the Editor, 706-12). 

 Holland, E. B. and Ritchie, W. S. (1939). Report on zinc. J. Ass. 



Off. Agric. Chem. 22, 333-8. 

 Holley, K. T. and Dulin, T. G. (1937). A study of ammonia and 



nitrate nitrogen for cotton. IV. Influence of boron concentration. 



Bull. Ga Agric. Exp. Sta. no. 197. 

 Hopkins, E. F. (1930). The necessity and function of manganese in 



the growth of Chlorella sp. Science, 72, 609-10. 

 Hopkins, E. F. (1930). Manganese an essential element for a green alga. 



Amer. J. Bot. 17, 1047. 

 Hopkins, E. F. (1934). Manganese an essential element for green plants. 



Mem. Cornell Agric. Exp. Sta. no. 151. 

 Hopkins, E. F. and Wann, F. B. (1927). Iron requirement for Chlorella. 



Bot. Gaz. 84, 407-27. 

 Hove, E., Elvehjem, C. A. and Hart, E. B. (1937). The physiology of 



zinc in the nutrition of the rat. Amer. J. Physiol. 119, 768-75. 

 Hurd-Karrer, Annie M. (1934). Selenium injury to wheat plants and 



its inhibition by sulphur. J. Agric. Res. 49, 343-57. 

 Hurd-Karrer, Annie M. (1935). Factors affecting the absorption of 



selenium from soils by plants. J. Agric. Res. 50, 413-27. 

 Hurd-Karrer, Annie M. (1937). Selenium absorption by crops as 



related to their sulphur requirement. J. Agric. Res. 54, 601-8. 



