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N : P ratios in terrestrial plants: variation and functional significance |
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| Authors: | Sabine Gü sewell |
| Affiliation: | Geobotanical Institute ETH, Zürichbergstrasse 38, 8044 Zürich, Switzerland |
| Abstract: | |
| Keywords: | critical N : P ratios ecological stoichiometry nutrient limitation plant strategies species richness tissue nutrient concentrations |