1. USDA-ARS, 2771 F&B Rd., College Station, TX 77845, United States (Corresponding author); email: bfritz@apmru.usda.gov
2. USDA-ARS, 2771 F&B Rd., College Station, TX 77845, US.
3. Wolf Consulting & Research LLC, Mahomet, IL 61853, US.
4. Univ. of Illinois, Urbana, IL 61801, US.
5. Wilbur-Ellis Company, San Antonio, TX 75289, US.