Henslow, George
Logan, James
Charles Darwin
Sébastien Patiny
International Colloquium for the Optimization of Plant Nutrition (8th 1992 Lisbon, Portugal)
Wolfgang Bussler
Connecticut Agricultural Experiment Station
H. DeWayne Ashmead
Douglas William Biedenweg
L. R. Auchmoody
W. M. Docters van Leeuwen
Nuttonson, M. Y.
International Colloquium for the Optimization of Plant Nutrition (6th 1984 Montpellier, France)
Lierre Keith