http://orgprints.org/7368/ Nitrogen uptake by spring barley grown with red and white clover A field experiment was undertaken to measure the uptake by spring barley of nitrogen at different distances from a boundary with either red or white clover. Clover plants at the boundary with the barley were labelled with a foliar 15N application. Its distance from the clover boundary did not signifi-cantly affect nitrogen uptake by the barley. However measurements of the isotopic label showed a transfer of 2.5% of the N from the red clover and 1% of the N from the white clover to the barley over short dis-tances. The study has indicated that transfer of N between clover and cereals is spatially limited and at least within the first year, it is unlikely to provide agronomically significant supplies of N Rees, Dr Robert Baddeley, Dr John Bingham, Dr Ian Watson, Dr Christine 4nutrient int_conf_joint2006_4 uk-sac Nitrogen uptake by spring barley grown with red and white clover 2006-05-10 Rees, Dr Robert; Baddeley, Dr John; Bingham, Dr Ian and Watson, Dr Christine (2006) Nitrogen uptake by spring barley grown with red and white clover. Joint Organic Congress, Odense, Denmark, May 30-31, 2006. source