174 LIST OF LITERATURE 



Skoog, F. (1940). Relationships between zinc and auxin in the growth 



of higher plants. Amer. J. Bot. 27, 939-51. 

 Smith, G. S. (1935). The determination of small amounts of boron 



by means of quinalizarin. Analyst, 60, 735-9. 

 Smith, M. E. and Bayliss, N. S. (1942). The necessity of zinc for Pinus 



radiata. Plant Physiol. 17, 303-10. 

 Smith, M. I., Stohlman, E. F. and Lillie, R. D. (1937). The toxicity 



and pathology of selenium. J. Pharmacol. 60, 449-70. 

 Smith, R. E. and Thomas, H. E. (1928). Copper sulphate as a remedy 

 for exanthema in prunes, apples, pears and olives. Phytopathology, 

 18, 449-54. 

 Snyder, E. and Harmon, F. N. (1942). Some effects of zinc sulphate on 



the Alexandria grape. Proc. Amer. Soc. Hort. Sci. 40, 325-7. 

 Snyder, G. B. and Donaldson, R. W. (1937). The use of borax in 

 controlling dark center of turnips. Proc. Amer. Soc. Hort. Sci. 

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 Somers, I. I., Gilbert, S. G. and Shive, J. W. (1942). The iron- 

 manganese ratio in relation to the respiratory C0 2 and deficiency - 

 toxicity symptoms in soybeans. Plant Physiol. 17, 317-20. 

 Somers, I. I. and Shive, J. W. (1942). The iron -manganese relation in 



plant metabolism. Plant Physiol. 17, 582-602. 

 Sommer, A. L. (1926). Studies concerning the essential nature of 

 aluminium and silicon for plant growth. Univ. Calif. Publ. Agric. 

 Sci. 5, 57-81. 

 Sommer, A. L. (1928). Further evidences of the essential nature of zinc 



for the growth of higher green plants. Plant Physiol. 3, 217-21. 

 Sommer, A. L. (1931). Copper as an essential for plant growth. Plant 



Physiol. 6, 339-45. 

 Sommer, A. L. and Baxter, A. (1942). Differences in growth limitation 

 of certain plants by magnesium and minor element deficiencies. 

 Plant Physiol. 17, 109-15. 

 Sommer, A. L. and Lipman, C. B. (1926). Evidence of the indispensable 

 nature of zinc and boron for higher green plants. Plant Physiol. 

 1, 231-49. 

 Steinberg, R. A. ( 1919). A study of some factors in the chemical stimula- 

 tion of the growth of Aspergillus niger. Amer. J. Bot. 6, 330-72. 

 Steinberg, R. A. (1935a). The nutritional requirements of the fungus 



Aspergillus niger. Bull. Torrey Bot. CI. 62, 81-90. 

 Steinberg, R. A. (19356). Nutrient-solution purification for removal 

 of heavy metals in deficiency investigations with Aspergillus niger. 

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 Steinberg, R. A. (1937). Role of molybdenum in utilization of am- 

 monium- and nitrate-nitrogen by Aspergillus niger. J. Agric. Res. 

 55, 891-902. 

 Steinberg, R. A. (1938a). Applicability of nutrient-solution puri- 

 fication to the study of trace-element requirements of Rhizobium 

 and Azotobacter. J . Agric. Res. 57, 461-76. 

 Steinberg, R. A. (19386). The essentiality of gallium to growth and 

 reproduction of Aspergillus niger. J. Agric. Res. 57, 569-74. 



