Summary
Two methods for measuring nitrogen fixation, the so-called ‘A’ value method and the so-called ‘isotope dilution’ or ‘substrate labelling’ method are shown to be both unifiable and yield independent.
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References
Fried M and Broeshart H 1975 Plant and Soil 43, 707–715.
Fried M and Middelboe V 1977 Plant and Soil 47, 713–715.
Rennie R J H and Rennie D A 1983 Can. J. Microbiol. 29, 1022–1035.
Vose P Bet al. 1981In Proc. of a Workshop at Cali. Colombia pp 575–592.
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Fried, M. Unification of two methods for measuring the amount of nitrogen fixed by a legume crop. Plant Soil 84, 139–141 (1985). https://doi.org/10.1007/BF02197876
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DOI: https://doi.org/10.1007/BF02197876