386 Mineral Nutrition of Plants 



41. Sideris, C. P., and Young, H. Y., Plant Physiol., 20:649 (1945). 



42. Sideris, C. P., and Young, H. Y., Plant Physiol., 21:218 (1946). 



43. Skok, John, Plant Physiol., 16:145 ( I 94 1 )- 



44. Smirnov, A., Strom, E., and Kuznetzov, S., Bull. acad. sci. U.R.S.S., 

 Ser. Biol 2:265 (1938). 



45. Steinberg, Robert A., /. Agr. Research, 59:731 (1939). 



46. , /. Agr. Research, 64:455 (1942). 



47. , /. Agr. Research, 64:615 (1942). 



48. , /. Agr. Research, 75:81 (1947). 



49. , /• Agr. Research, 78:733 (1949). 



50. — , Bowling, John D., and McMurtrey, J. E. Jr., Plant Physiol., 

 25:279 (1950). 



51. Stepka, W., Benson, A. A., and Calvin, M., Science, 108:304 (1948). 



52. Steward, F. C, and Street, H. E., Plant Physiol., 21:155 (1946). 



53. Turtschin, Th. W., Z. Pfianzenernahr. Diingung u. Boden\., 44:65 

 (1936). 



54. Vickery, Hubert Bradford, Cold Spring Harbor Symposia on Quanti- 

 tative Biology, 6:67 (1938). 



55. , Biological Symposia, 5:3 ( 1 94 1 ) . 



56. , Pucher, George W., Schoenheimer, Rudolph, and Ritten- 



house, D. /. Biol. Chem., 135:531 (1940). 



57. Viets, F. G., Jr., Moxon, A. L., and Whitehead, E. I., Plant Physiol., 

 21:271 (1946). 



58. Wadleigh, Cecil H., and Shive, John W., Soil Sci., 47:33 (1939)- 



59. Wall, Monroe E., Soil Sci., 47:143 (1939). 



60. , Soil Sci., 49:393 (1940). 



61. Wood, J. P., and Petrie, A. H. K., Australian J. Exptl. Biol. Med. Sci., 

 20:249 (1942). 



