172 LIST OF LITERATURE 



Reed, H. S. and Dufrenoy, J. (1935). The effects of zinc and iron salt 



on the cell structure of mottled orange leaves. Hilgardia, 9, 113 37. 



Reed, H. S. and Dufrenoy, J. (1942). Catechol aggregates in the 



vacuoles of cells of zinc -deficient plants. Amer. J. Bot. 29, 544-51. 

 Reed, J. F. and Cummings, R. W. (1940). Determination of zinc in 



plant materials using the dropping mercury electrode. Industr. 



Engng Chem. (Anal, ed.), 12, 489-92. 

 Reed, J. F. and Cummings, R. W. (1941). Determination of copper in 



plant materials using the dropping mercury electrode. Industr. 



Engng Chem. (Anal, ed.), 13, 124-7. 

 Reeve, E. and Shive, J. W. (1944). Potassium -boron and calcium- 

 boron relationships in plant nutrition. Soil Sci. 57, 1-14. 

 Rehm, S. (1937). Der Einfluss der Borsaure auf Wachstum und Salzauf- 



nahme von Invpatiens balsamina. Jb. miss. Bot. 85, 788-814. 

 Reuther, W. and Burrows, F. W. (1942). The effect of manganese 



sulfate on the photosynthetic activity of trenched tung foliage. 



Proc. Amer. Soc. Hort. Sci. 40, 73-6. 

 Reuther, W. and Dickey, R. D. (1937). A preliminary report on 



trenching of tung trees. Bull. Fa Agric. Exp. Sta. no. 318, pp. 1-21. 

 Roach, W. A. (1938). Plant injection for diagnostic and curative pur- 

 poses. Tech. Comm. Imp. Bur. Hort. Plant. Crops, no. 10. 

 Roach, W. A. (1939). Plant injection as a physiological method. Ann. 



Bot., Lond., N.S. 3, 155-226. 

 Roberg, M. (1928). Uber die Wirkung von Eisen-, Zink-, und Kupfer- 



salzen auf Aspergillen. Zbl. Bakt. n, 74, 333-71. 

 Roberg, M. (1931). Weitere Untersuchungen uber die Bedeutung des 



Zinks fur Aspergillus niger. Zbl. Bakt. n, 84, 196-230. 

 Roberg, M. (1932). Ein Beitrag zur Stoffwechselphysiologie der 



Grunalgen. II. Uber die Wirkung von Eisen-, Zink- und Kupfer- 



salzen. Jb. wiss. Bot. 76, 311-32. 

 Robinson, W. O. (1933). Determination of selenium in wheat and soils. 



J. Ass. Off. Agric. Chem. 16, 423-4. 

 Rogers, C. H. (1938). Growth of Phymatotrichum omnivorum in solu- 

 tions with varying amounts of certain mineral elements. Amer. J. 



Bot. 25, 621-4. 

 Rogers, L. H. (1935). Spectrographic microdetermination of zinc. 



Preliminary note. Industr. Engng Chem. (Anal, ed.), 7, 421-3. 

 Rogers, L. H. and Gall, O. E. (1937). Microdetermination of zinc. 



Comparison of spectrographic and chemical methods. Industr. 



Engng Chem. (Anal, ed.), 9, 42-4. 

 Rowe, E. A. (1936). A study of heart-rot of young sugar beet plants 



grown in culture solutions. Ann. Bot., Lond., 50, 735-46. 

 Rusoff, L. L., Rogers, L. H. and Gaddum. L. W. (1937). Quantitative 



determination of copper and estimation of other trace elements by 



spectrographic methods in wire grasses from ' salt sick ' and healthy 



areas. J. Agric. Res. 55, 731-8. 



Sachs, J. (1860). Ueber die Erziehung von Landpflanzen in Wasser. 

 Bot. Z. 18, 113-17. 



