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G. Velthof ; O. Oenema ; R. Postma ; M. Van Beusichem | 1997Five field experiments and one greenhouse experiment were carried out to assess the effects of nitrogen (N) fertilizer type and the amount of applied N fertilizer on nitrous oxide (N2O) emission from grassland. During cold and dry conditions in [...]
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O. Oenema ; G. Velthof ; S. Yamulki ; S. Jarvis | 1997Grazing animals on managed pastures and rangelands have been identified recently as significant contributors to the global N2O budget. This paper summarizes relevant literature data on N2O emissions from dung, urine and grazed grassland, and pro[...]
article/chapitre/communication
G. Velthof ; J. Koops ; J. Duyzer ; O. Oenema | 1996Three measurement campaigns were carried out to answer questions related to the factors controlling variations in nitrous oxide (N2O) fluxes from intensively managed grassland on peat soil, comparison of flux measurements with a closed flux cham[...]
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G. Velthof ; A. Brader ; O. Oenema | 1996Seasonal and interannual variations in nitrous oxide (N2O) losses from agricultural soils hamper the accurate quantification of the N2O source strength of these soils. This study focuses on a quantification of seasonal and interannual variations[...]
