Dr. David Powlson, Head of Soil Science Department at AACR-Rothamsted, England, was e-mail interviewed by Dr. Noorallah Juma in 2001.
 
Dr. Freddy O. Nachtergaele, Technical Officer for Soil Resources and Land Classification, Food and Agriculture Organization (FAO) of the United Nations, was e-mail interviewed by Dr. Noorallah Juma in 2002.