1. Centre for Ecology and HydrologyWallingfordOX10 8BBUK
2. Dep. of Soil ScienceUniv. of ManitobaWinnipegManitobaR3T 2N2Canada
3. Dep. of Crop Soil and Environmental SciencesUniv. of ArkansasFayetteville AR72701USA
4. USDA‐ARS, Pasture Systems and Watershed Management Research UnitUniversity ParkPennsylvaniaUSA
5. Civil EngineeringNational Univ. of IrelandGalwayH91 HX31Ireland
6. STFC Rutherford Appleton Lab.Harwell CampusDidcotOxfordshireOX11 0QXUK