1. Dep. of Agriculture and Horticulture, School of Natural Resources and Extension; University of Alaska Fairbanks; 905 N. Koyukuk Drive Fairbanks AK 99775
2. USDA-ARS Southern Regional Research Center; 1100 Robert E Lee Blvd New Orleans LA 70124
3. Editorial Dep. of the Transactions of the Chinese Society of Agricultural Engineering; (TCSAE No. 41 Maizidian Street) Chaoyang District Beijing China 100125