1. Environmental Sciences Graduate Program, Oregon State University, Corvallis, OR 97331, USA
2. Department of Agriculture Sciences, Los Angeles Pierce College, 6201 Winnetka Avenue, PMB 553, Woodland Hills, CA 91304, USA
3. Department of Statistics, Oregon State University, Corvallis, OR 97331, USA
4. Department of Wood Science & Engineering, Oregon State University, Corvallis, OR 97331, USA
5. Department of Crop and Soil Sciences, Oregon State University, Corvallis, OR 97331, USA