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{{Multiple issues|{{more citations needed|date=March 2024}}
'''Carsten Erik Olsen''' ([[March 1]], [[1891]] – [[August 19]], [[1974]]) was a Danish plant ecologist and plant physiologist, who pioneered the study of plant nutrition in soils of different pH. He was born in [[Copenhagen]] and began studies of botany at the [[University of Copenhagen]] in 1910, at first with professor [[E. Warming]], then with professor [[Christen Raunkiær]]. His doctoral dissertation ([[1921]]) was on the influence of soil pH on the natural distribution of plants. He was then employed by the Carlsberg Laboratory as an assistant to the chemist [[S. P. L. Sørensen]], later in his own lab. There, he worked on plant uptake of ions, especially [[iron]], [[nitrogen fixation]] and [[calcicolous plants]].▼
{{cleanup|date=March 2024|reason=long unreferenced bibliography section}}}}{{Short description|Danish plant ecologist and plant physiologist}}
{{Infobox scientist
Works|name on = Carsten Olsen:▼
|image = Olsen-Carsten.jpg
|birth_date = {{birth date|1891|03|01|df=y}}
|birth_place = [[Copenhagen]], [[Denmark]]
|nationality = [[Denmark|Danish]]
|death_date = {{death date and age|1974|08|19|1891|03|01|df=y}}
|death_place = [[Copenhagen]]
|field = Plant [[ecology]], [[Plant physiology]]
|work_institution = [[Carlsberg Laboratory]]
|alma_mater = [[University of Copenhagen]]
|doctoral_advisor =
|doctoral_students =
|known_for = Plant [[nutrition]] in relation to [[soil pH]]
|prizes =
|footnotes =
|signature =
}}
 
'''Carsten Erik Olsen''' (1 March 1891 – 19 August 1974) was a Danish plant ecologist and plant physiologist, who pioneered the study of [[plant nutrition]] in soils of different [[pH]].
Scientific works by Carsten Olsen:▼
 
==Biography==
* Olsen, C. (1914) Vegetationen i nordsjællandske Sphagnummoser. Botanisk Tidsskrift, 34, 1-44.▼
 
* Olsen, C. (1914) The structure and biology of arctic flowering plants. 9. Cornaceae. Meddelelser om Grønland, 37, 127-150.▼
▲'''Carsten Erik Olsen''' ([[March 1]], [[1891]] – [[August 19]], [[1974]]) was a Danish plant ecologist and plant physiologist, who pioneered the study of plant nutrition in soils of different pH. He was born in [[Copenhagen]] and began studies of [[botany]] at the [[University of Copenhagen]] in 1910, at first with professor [[E.Eugenius Warming]], then with professor [[Christen Raunkiær]]. His doctoral dissertation ([[1921]]) was on the influence of soil pH on the natural distribution of plants. He was then employed by the [[Carlsberg Laboratory]] as an assistant to the chemist [[S. P. L. Sørensen]], later in his own lab. There, he worked on plant uptake of ions, especially [[iron]], [[nitrogen fixation]] and [[Calcicole|calcicolous plants]].
* Olsen, Carsten Erik (1916) Morfologisk, biologisk og formationsstatistisk Undersøgelse af Mosserne og Karplanterne i de danske Egeskoves og Egekrats Bundflora. Gold medal prize dissertation, University of Copenhagen, 1916. 204 pp.▼
<ref>{{cite web|url= https://runeberg.org/salmonsen/2/18/0507.html|title = Olsen, Carsten Erik |website=Salmonsens konversationsleksikon
* Olsen, C. (1917) Studier over Epifyt-Mossernes Indvandringsfølge (Succession) paa Barken af vore forskellige Træer, samt et Bidrag til disse Mossers Økologi [Eng. summ.]. Botanisk Tidsskrift, 34, 313-342.▼
|access-date=May 1, 2020}}</ref>
* Olsen, C. (1921) The concentration of hydrogen ions in the soil. Science, 54, 539-541.▼
 
* Olsen, C. (1921) The ecology of Urtica dioica. Journal of Ecology, 9, 1-17.▼
[[Image:Olsen1921.jpg|thumb|135px|right|Olsen's soil pH series with four plant species: [[Deschampsia flexuosa]], [[Senecio sylvaticus]], [[Sanguisorba minor]], [[Tussilago farfara]]]]
 
▲==Scientific works by Carsten Olsen:==
▲* Olsen, C. (1914) Vegetationen i nordsjællandske Sphagnummoser. [[Botanisk Tidsskrift,]] 34, 1-44.
▲* Olsen, C. (1914) The structure and biology of arcticArctic flowering plants. 9. Cornaceae. [[Meddelelser om Grønland,]] 37, 127-150.
▲* Olsen, Carsten Erik (1916) Morfologisk, biologisk og formationsstatistisk Undersøgelse af Mosserne og Karplanterne i de danske Egeskoves og Egekrats Bundflora. Gold medal prize dissertation, [[University of Copenhagen]], 1916. 204 pp.
▲* Olsen, C. (1917) Studier over Epifyt-Mossernes Indvandringsfølge (Succession) paa Barken af vore forskellige Træer, samt et Bidrag til disse Mossers Økologi [Eng. summ.]. [[Botanisk Tidsskrift,]] 34, 313-342.
▲* Olsen, C. (1921) The concentration of hydrogen ions in the soil. ''[[Science, (journal)|Science]]'' 54 (1405), 539-541. [http://www.sciencemag.org/content/vol54/issue1405/index.dtl]
▲* Olsen, C. (1921) The ecology of Urtica dioica. [[Journal of Ecology,]] 9, 1-17. [https://www.jstor.org/stable/2255757]
* Olsen, C. (1923) Studies on the hydrogen ion concentration of the soil and its significance to the vegetation, especially to the natural distribution of plants. Comptes Rendus des Travaux du Laboratoire Carlsberg, 15 (1), 1-166. Translation of Doctoral Thesis, University of Copenhagen, 1921.
* Olsen, C. & Linderstrøm-Lang, K. (1927) On the accuracy of the various methods of measuring concentration of Hydrogen ions in soil. Comptes Rendus des Travaux du Laboratoire Carlsberg, 17 (1), 1-27.
Line 14 ⟶ 42:
* Olsen, C. (1928) On the significance of hydrogen-ion concentration for the cycle of nitrogen transformation in the soil. Comptes Rendus des Travaux du Laboratoire Carlsberg, 17 (8), 1-21.
* Olsen, C. (1929) On the analytical determination of ammonia in soil, and the adsorption power of soil for ammonia. Comptes Rendus des Travaux du Laboratoire Carlsberg, 17 (15), 1-20.
* Olsen, C. (1929) OmOn Humusstoffernesthe Indflydelseinfluence paaof Vækstenhumus afsubstances grønneon Planterthe igrowth Vandkulturof green plants in water culture. MeddelelserComptes fraRendus Carlsbergdes LaboratorietTravaux du Laboratoire Carlsberg, 18 (1), 1-1516.
* Olsen, C. (19341932) TheStudier absorptionon ofnitrogen manganesefixation. byI. plantsNitrogen fixation in the dead leaves of forest beds. Comptes Rendus des Travaux du Laboratoire Carlsberg, 2019 (9), 1-2036.
* Olsen, C. (1934) The absorption of manganese by plants. Comptes Rendus des Travaux du Laboratoire Carlsberg, 20, 1-34.
* Olsen, C. (1934) Über Manganaufnahme der Pflanzen. Biochem. Zeitschr., 269, 329-348.
* Olsen, C. (1935) Iron absorption and chlorosis in green plants. Comptes Rendus des Travaux du Laboratoire Carlsberg, 21, 15-52.
* Olsen, C. (1936) The absorption of manganese by plants. II. Toxicity of manganese to various plant species. Comptes Rendus des Travaux du Laboratoire Carlsberg, 21, 129-146.
* Olsen, C. (1937) Über die Anwendbarkeit des Kjeldahlschen Stickstoffbestimmungsverfahrens bei biologischen Untersuchungen. Biochem. Zeitschr., 291, 178-187.
* Hevesy, G., Linderstrøm-Lang, K., & Olsen, C. (1937) Exchange of phosphorus atoms in plants and seeds. ''[[Nature (journal)|Nature]]'' 139, 149-150.
* Olsen, C. (1938) Experiments with different quantities of iron salts given to maize in water culture. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 21, 301-313.
* Olsen, C. (1938) Growth of Deschampsia flexuosa in culture solutions (water culture experiments) and in soils with different pH values. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 22, 405.
* Olsen, C. (1938) Undersøgelser over Bundfloraen i danske Egeskove og Egekrat. [[Botanisk Tidsskrift]] 44, 367-432.
* Olsen, C. (1939) Absorption of calcium and formation of oxalic acid in higher green plants. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 23 (8), 101-123.
* Hevesy, G., Linderstrøm-Lang, K., Keston, A.S. & * Olsen, C. (1940) Exchange of Nitrogen atoms in the leaves of sunflower. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 23, 213-218.
* Olsen, C. (1942) Water culture experiments with higher green plants in nutrient solutions having different concentrations of calcium. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 24 (4), 1-29.
* Olsen, C. (1942) On the chlorophyll content of sun leaves and shade leaves of beech (Fagus silvatica). Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 24 (5), 1-5.
* Olsen, C. (1943) Natural glades in beech-wood on calcareous soil. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 24, 315-332.
* Olsen, C. (1946) Forandringer i Maglemoses Mosvegetation siden 1913-14. [[Botanisk Tidsskrift,]] 46, 347-383.
* Olsen, C. (1948). The mineral, nitrogen and sugar contents of beech leaves and beech leaf sap at various times. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 26, 197-230.
* Olsen, C. (1948). Adsorptively bound potassium in beech leaves. Physiologia Plantarum, 1, 136-141.
Line 30 ⟶ 64:
* Olsen, C. (1953) The significance of concentration for the rate of ion absorption by higher plants in water culture. II. Experiments with aquatic plants. Physiologia Plantarum, 6, 837-843.
* Olsen, C. (1953) The significance of concentration for the rate of ion absorption by higher plants in water culture. III. The importance of stirring. Physiologia Plantarum, 6, 844-847.
* Olsen, C. (1953) The significance of concentration for the rate of ion absorbtionabsorption by higher plants in water culture. IV. The influence of hydrogen ion concentration. Physiologia Plantarum, 6, 848-858.
* Olsen, C. (1954) Hvilke betingelser må være opfyldte, for at Helodea canadensis kan opnå den optimale udvikling, der er årsag til dens massevise optræden i naturen [Eng. summ.]. [[Botanisk Tidsskrift,]] 51, 263-273.
* Olsen, C. (1958) Iron absorption in different plant species as a function of the pH value of the solution. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 31 (4), 1-59.
* Olsen, C. (1958) Iron uptake in different plant species as a function of the pH value of the nutrient solution. Physiologia Plantarum, 11, 889-905.
Line 37 ⟶ 71:
* Olsen, C. (1970) On biological nitrogen fixation in nature, particularly in blue-green algae. Comptes Rendus des Travaux du Laboratoire Carlsberg. Série Chimique, 37 (12), 269-283.
 
==References==
▲Works on Carsten Olsen:
{{reflist}}
* Obituary in Botanisk Tidsskrift 70 (1): 98-100 (1973) by E. Bille Hansen.▼
 
==Other sources==
▲* Obituary in [[Botanisk Tidsskrift]] 70 (1): 98-100 (1973) by E. Bille Hansen.
 
==External links==
*[https://www.researchgate.net/scientific-contributions/2163579219_Carl_Erik_Olsen Carl Erik Olsen research while affiliated with University of Copenhagen]
{{authority control}}
 
{{DEFAULTSORT:Olsen, Carsten}}
[[Category:1891 births]]
[[Category:1974 deaths]]
[[Category:20th-century Danish botanists]]
[[Category:Danish ecologists]]
[[Category:University of Copenhagen alumni]]
[[Category:Carlsberg Laboratory staff]]
[[Category:Plant ecologists]]
[[Category:Plant physiologists]]
Retrieved from "https://en.wikipedia.org/wiki/Carsten_Olsen"