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On the Origin of the Theory of Mineral Nutrition of Plants and the Law of the Minimum

^a Inst. of Soil Science, Univ. of Hannover, Herrenhaeuser Str. 2, 30419 Hannover, Germany
^b Inst. of Agronomy and Plant Breeding, Univ. of Göttingen, Von-Siebold-Str. 8, 37075 Göttingen, Germany
^c Dep. of Agronomy, Kansas State Univ., Manhattan, KS 66506-5501 USA

View larger version (26K): [in a new window]   Fig. 1 Map of Germany in its former and present borders, with some of the main stations in the life of Carl Sprengel

View larger version (105K): [in a new window]   Fig. 2 Carl Sprengel (1787–1859), as shown on an undated picture kept by the Main Library of the University of Göttingen (Germany)

View larger version (141K): [in a new window]   Fig. 3 Excerpt from page 93 of Sprengel (1828) with Sprengel's first formulation of the Law of the Minimum; the English translation is given in the text

View larger version (136K): [in a new window]   Fig. 4 Justus von Liebig (1803–1873), in 1840 a propagandist and promulgator of truths already announced by others, rather than a discoverer of new knowledge