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The Chemical Induction of Parthenocarpy in the Calimyrna Fig and its Physiological Significance.

14. SCHREVEN-, D. A. \VANT. 1959. Effects of added sugars and nitrogen oni nodulationl of legumes. Plant Soil 11: 93-112. 15. TANNER, J. W. AND I. C. ANDERSON. 1963. Ani external effect of inorganic nitrogen in root niodulation. Nature 198: 303-04. 16. THIORNTON, H. G. 1936. The actionl of sodium nitrate upoIn the inifectioii of lucernie root liairs by nodule bacteria. Proc. Roy. Soc. London B ...