@inbook{a0cde2c48ac142f698a4a2abdd50b6c4,
title = "Nutrient management under grazing",
author = "O. Oenema and T.V. Vellinga and {van Keulen}, H.",
year = "2006",
language = "English",
isbn = "9781402054518",
series = "Wageningen UR Frontis Series",
publisher = "Springer",
number = "18",
pages = "63--83",
editor = "A. Elgersma and J. Dijkstra and S. Tamminga",
booktitle = "Proceedings of the Frontis Workshop on Fresh herbage for dairy cattle: the key to a sustainable food chain, Wageningen, The Netherlands, April 2005",
}