In: Proceedings of the XVI International Grassland Congress, Nice (France) Versailles : Association Francaise pour la Production Fourragere - p. 159 - 160.
Institute for Soil Fertility
Contribution in proceedings
The seasonal variations in soil mineral nitrogen (N) were studied in 5 field experiments on intensively used grassland (90 Lolium perenne) in the Netherlands in 1985-88. In unfertilized grassland the quantity of soil mineral N ranged from 19 to 58 k
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