Media type: E-Article Title: The combined effect of fertiliser nitrogen and phosphorus on herbage yield and changes in soil nutrients of a grass/clover and grass-only sward Contributor: Schils, René; Snijders, Paul imprint: Springer Science and Business Media LLC, 2004 Published in: Nutrient Cycling in Agroecosystems Language: English DOI: 10.1023/b:fres.0000019045.90791.a4 ISSN: 1385-1314 Keywords: Soil Science ; Agronomy and Crop Science Origination: Footnote: