1. National Institute of Animal Science Rural Development Administration 1500, Kongjwipatjwi‐Ro, Iseo‐Myeon, Wanju‐Gun Jeonju Jeollabuk‐Do 55365 Republic of Korea
2. National Lab. for Agriculture and the Environment USDA‐ARS 1015 N. University Blvd. Ames IA 50011 USA
3. Dep. of Agricultural and Biosystems Engineering Iowa State Univ. 3348 Elings Hall Ames AI 50011 USA
4. Coastal Plains Soil, Water, and Plant Research Center USDA‐ARS 2611 West Lucas St. Florence SC 29501 USA