Grasslands account for as much as one-third of the net primary production on land. Results from a network of experiments carried out on five continents suggest that two or more nutrients often constrain the productivity of these globally significant ecosystems.
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Vitousek, P. Grassland ecology: Complexity of nutrient constraints. Nature Plants 1, 15098 (2015). https://doi.org/10.1038/nplants.2015.98
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DOI: https://doi.org/10.1038/nplants.2015.98
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