%0 Journal Article %T Optimizing Nitrogen Management in Food and Energy Production and Environmental Protection: Summary Statement from the Second International Nitrogen Conference %A Ellis Cowling %A James Galloway %A Cari Furiness %A Mary Barber %J The Scientific World Journal %D 2001 %I %R 10.1100/tsw.2001.481 %U http://dx.doi.org/10.1100/tsw.2001.481