1. Henri Järv, M.S., Estonian University of Life Sciences, Institute of agricultural and environmental sciences Kreutzwaldi 1, Tartu 51014, Estonia
2. Ass. Prof. Jaak Kliimask, Estonian University of Life Sciences, Institute of agricultural and environmental sciences Kreutzwaldi 1, Tartu 51014, Estonia
3. Dr. phil. Raymond Ward, School of Environment and Technology, University of Brighton, Moulsecoomb, Brighton, BN2 4GJ, United Kingdom of Great Britain and Northern Ireland
4. Prof. Dr. rer. nat. Kalev Sepp, Estonian University of Life Sciences, Institute of agricultural and environmental sciences Kreutzwaldi 1, Tartu 51014, Estonia