Selected Bibliography 229 



5. Fred, E. Ik, Baldwin, I. L., and McCoy, E., Root Nodule Hdctciia and 

 Leguminous Plants, Uni\t'isity of WisconsiiT Press, Madison, Wis., 1932. 



6. Giobel, G., The relation of the soil nitrogen to nodule de\ elopment and 

 fi.xation of nitrogen by certain legumes, N. J. Agr. Expt. Sla. Bull. 436: 

 125, 1926. 



7. Jensen, H. L., Nitrogen fixation in leguminous plants, I-VI, Proc. Linncun 

 Soc. N. S. W(dcs. 67:98-108, 1942; 68:207-220, 1943; 69:229-237, 1944; 

 70:20a-210, 1946. 



8. Jones, F. R., and Tisdalc, W. B., Effect of soil temperature upon the de\el- 

 opment of nodules on the roots of certain legumes, J. Agr. Research, 22:17- 

 32, 1921. 



9. Lipman, J. G., and Con\l)eare, A. B., Preliminary note on the in\entory 

 and balance sheet of plant nutrients in the United States, N. J. Agr. Expt. 

 Sta. Bull. 607, 1936. 



10. Thornton, H. G., The influence of the host plant in inducing parasitism in 

 lucerne and clover nodules, Proc. Roy. Soc. London, B, 106:110-122, 1930. 



11. Thornton, H. G., and Nicol, II., Reduction of nodule numbers and growth, 

 produced by the addition of sodium nitrate to lucerne in sand culture, 

 J. Agr. Sci., 26:173-188, 1936. 



12. Virtanen, A. I., Cattle Fodder and Human Nutrition, ivith Special Reference 

 to Biological Nitrogen Fi.xation, Cambridge University Press, 1938. 



13. Virtanen, A. I., and Laine, T., Investigations on the root nodule bacteria of 

 leguminous plants. XXII. The excretion products of root nodules. The 

 mechanism of N-fi.\ation, Biochem. J., 33:412-427, 1939. 



14. Wilson, P. W., The Biochemistry of Symbiotic Nitrogen Fixation, University 

 of Wisconsin Press, Madison, Wis., 1940. 



15. Wilson, P. W., and Burris, R. H., The mechanism of biological nitrogen 

 fixation, Bad. Revs., 11:41-73, 1947. 



16. Wilson, P. W., Hull, J. F., and Burris, R. H., Competition betv^'een free 

 and combined nitrogen in nutrition of Azotobacter, Proc. Natl. Acad. Sci., 

 29:289-294, 1943. 



17. Wyss, O., Lind, C. J., Wilson, J. B., and Wilson, P. W., Mechanism of 

 biological nitrogen fixation. 7. Molecular Ho and pN-2 function of Azoto- 

 bacter, Biochem. J., 35:845-854, 1941. 



