1. Dep. of Crop and Soil Sciences North Carolina State Univ. Box 7620 Raleigh NC 27695 USA
2. Dep. of Agricultural and Resource Economics North Carolina State Univ. Box 8109 Raleigh NC 27695 USA
3. North Carolina Dep. of Agriculture and Consumer Services, Peanut Belt Research Station Lewiston‐Woodville NC 27849 USA