1. Department of Agronomy Faculty of Agriculture Khon Kaen University Khon Kaen Thailand
2. Peanut, Jerusalem Artichoke and Cassava Improvement Research Group Khon Kaen University Khon Kaen Thailand
3. Crop & Soil Sciences National Environmentally Sound Production Agriculture Laboratory (NESPAL) The University of Georgia Tifton GA USA
4. Lancaster Environment Centre Lancaster University Lancaster UK