1Department of Land, Air and Water Resources, University of California – Davis, Davis CA 95616 (USA)
2USDA-ARS, Cropping Systems Research Laboratory, Wind Erosion and Water Conservation Unit, Lubbock TX 79415 (USA)
3USDA-ARS, Central Great Plains Research Station, 40335 County Road GG, Akron, CO 80720, USA
4Department of Land, Air and Water Resources, University of California Davis, Davis, CA 95616, USA