Julius Stoklasa

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Julius Stoklasa

Julius Stoklasa (born September 9, 1857 in Litomysl , † April 4, 1936 in Prague ) was a Czech agricultural chemist .

Live and act

Stoklasa studied agriculture at the University of Natural Resources and Life Sciences in Vienna and at the University of Leipzig , where he received his PhD in 1893. phil. received his doctorate. In 1894 he completed his habilitation at the Technical University in Prague . Here he worked, initially as a private lecturer, from 1901 as a full professor of agricultural chemistry and physiology until his retirement in 1927. From 1899 to 1918 he was also director of the State Chemical-Physiological Research Station in Prague.

Stoklasa acquired a high international reputation through a large number of fundamental agricultural chemical and agricultural physiological work. The focus of his research activities included, among other things, studies of the chemical processes involved in rock weathering and soil formation , problems with carbon dioxide and bacterial fertilization , the cycle of phosphate ions in the soil, and the importance of potassium and aluminum for the nutrition of crops and about the toxic effects of sulfur and selenium compounds on plant organisms.

His list of publications includes over 400 scientific publications, including numerous books. Over half of his publications appeared in German. His main work is the " Handbook of the biophysical and biochemical investigation of the soil " published in 1926 . In this book he describes in detail the most important methods for examining soils and the criteria for assessing soil fertility .

Stoklasa took part in the development of agricultural research well into old age. He has been honored many times for his scientific achievements and has been awarded high medals. The Czechoslovak Academy of Sciences made him an honorary member in 1927 and the University of Agriculture and Forestry in Brno awarded him an honorary doctorate in 1928.

Major works

  • Pedological studies . Reinwart Prague publishing house 1890.
  • Chemical and physiological studies on the superphosphates . Publisher Paul Parey Berlin 1896.
  • Biochemical cycle of the phosphate ion in the soil . Publishing house G. Fischer Jena 1911.
  • Contributions to the knowledge of the sugar beet diet. Physiological importance of the potassium ion in the organism of the sugar beet (with Alois Matousek). Publisher G. Fischer Jena 1916.
  • The bread of the future . Publishing house G. Fischer Jena 1917.
  • About the distribution of aluminum in nature and its importance in construction. and metabolism of plants . Publishing house G. Fischer Jena 1922.
  • The damage to vegetation from smoke gases and factory exhalations . Publishing house Urban & Schwarzenberg Berlin and Vienna 1923.
  • Handbook of the biophysical and biochemical investigation of the soil (with the assistance of Ernst Gustav Doerell (university professor) ). Publisher Paul Parey Berlin 1926.

Web links


  • P. Krische: Outstanding agricultural chemists and their research institutes. III. Julius Stoklasa and the chemical-physiological experimental station of the KK Bohemian Technical University in Prague . In: The Nutrition of the Plant Vol. 7, 1911, pp. 181-185 (with picture and list of publications).
  • EG Doerell: For Julius Stoklasa's 70th birthday . In: The nutrition of the plant vol. 23, 1927, pp. 328–331 (with picture).
  • Festschrift on the occasion of Julius Stoklasa's seventieth birthday . Published by EG Doerell et al., Verlag Paul Parey Berlin 1928. - The extensive volume contains numerous contributions, several images and a list of his publications.