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- [43] ESTIMATING N-2-FIXATION IN THE FIELD USING N-15-LABELED FERTILIZER - SOME PROBLEMS AND SOLUTIONS SOIL BIOLOGY & BIOCHEMISTRY, 1983, 15 (06): : 631 - 639
- [45] Estimation of nitrogen fixation in Azolla-rice association using N-15 isotope dilution BIOLOGICAL NITROGEN FIXATION ASSOCIATED WITH RICE PRODUCTION, 1996, 70 : 109 - 116