Patterns of aboveground herbage production and nutritional quality structure on semiar1d grasslands

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• Present address: Department Plant Ecology and Evolutionary Biology, University of Utrecht. P.O. Box 800, 84, 3508 TB Utrecht, The Netherlands.
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• Present address: Section GVK, AB‐DLO (Research Institute for Agrobiology and Soil Fertility) Bornsesteg, 65, Postbus 14, Wageningen, The Netherlands.
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