Extended Data Table 8 Summary of pre-industrial terrestrial BNF inputs (Tg N yr−1) by niche by biome and global total

From: Global terrestrial nitrogen fixation and its modification by agriculture

  1. Central estimates are 2.5% trimmed means and lower and upper bounds in parentheses are 68% confidence intervals (analogous to ± 1 standard error). Pre-industrial BNF inputs were based on current biome simple means of grid cell values of BNF rate (kg N ha−1 yr−1) for each niche; see Methods and Supplementary Methods for details. “ND” stands for “Not determined”. The biome abbreviations are as in Extended Data Table 1. †IGBP land cover area in the year 1500 CE from ref. 64.
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