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xmlns:xlink="http://www.w3.org/1999/xlink"><gmd:MD_DataIdentification><gmd:citation><gmd:CI_Citation><gmd:title xsi:type="gmd:PT_FreeText_PropertyType"><gco:CharacterString>Teaching and Research Station in Thyrow, Germany</gco:CharacterString><gmd:PT_FreeText><gmd:textGroup><gmd:LocalisedCharacterString locale="ger">Lehr- und Forschungsstation Standort Thyrow, Deutschland</gmd:LocalisedCharacterString></gmd:textGroup></gmd:PT_FreeText></gmd:title><gmd:alternateTitle><gco:CharacterString>Data collection: Part 1/3, geodata: Grounds</gco:CharacterString></gmd:alternateTitle><gmd:date><gmd:CI_Date><gmd:date><gco:Date>2026-01-30</gco:Date></gmd:date><gmd:dateType><CI_DateTypeCode xmlns="http://www.isotc211.org/2005/gmd" codeList="https://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="issued"/></gmd:dateType></gmd:CI_Date></gmd:date><gmd:date><gmd:CI_Date><gmd:date><gco:Date>2026-01-30</gco:Date></gmd:date><gmd:dateType><CI_DateTypeCode xmlns="http://www.isotc211.org/2005/gmd" codeList="https://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="creation"/></gmd:dateType></gmd:CI_Date></gmd:date><gmd:date><gmd:CI_Date><gmd:date><gco:Date>2026-01-30</gco:Date></gmd:date><gmd:dateType><CI_DateTypeCode xmlns="http://www.isotc211.org/2005/gmd" codeList="https://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision"/></gmd:dateType></gmd:CI_Date></gmd:date><gmd:date><gmd:CI_Date><gmd:date><gco:Date>2026-01-30</gco:Date></gmd:date><gmd:dateType><CI_DateTypeCode xmlns="http://www.isotc211.org/2005/gmd" codeList="https://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication"/></gmd:dateType></gmd:CI_Date></gmd:date><gmd:identifier><gmd:MD_Identifier><gmd:code><gco:CharacterString>https://doi.org/10.20387/bonares-vcth-3a25</gco:CharacterString></gmd:code></gmd:MD_Identifier></gmd:identifier><gmd:presentationForm><gmd:CI_PresentationFormCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_PresentationFormCode" codeListValue="tableDigital" codeSpace="ISOTC211/19115"/></gmd:presentationForm></gmd:CI_Citation></gmd:citation><gmd:abstract xsi:type="gmd:PT_FreeText_PropertyType"><gco:CharacterString>The teaching and research station for agronomy in Thyrow is a service facility of the Albrecht Daniel Thaer-Institute for Agricultural and Horticultural Sciences of the Humboldt University of Berlin. The experimental site was founded in 1936 by Prof. Kurt Opitz is located about 30 kilometres south of Berlin. This site represents typical farming conditions of the young moraine landscapes of the Weichselian glaciation of Northeast Germany. According to the German classification of soil-climate spaces, the experimental site is located in the area of &#8220;dry-warm diluvial soils of East German lowlands&#8221; (diluvial: soils developed in glacial sediments). Within this area, soil values of the &#8220;German soil taxation framework&#8221; of less than 30 out of a maximum 100 are common.
Thyrow is located at approximately 42 m above sea level on the southern edge of the Teltow, a Weichselian ground moraine plateau. The slope is predominantly flat at 2 %. The dominant soil type for this is location is a Retisol developed in a sand over a deep loam. As typical for ground moraines the boundaries between the sandy and loamy layer vary intensely between 60 cm to 200 cm. This causes small-scale differences in water and nutrient resources especially of the subsoil. The plant available water capacity of the soil in the effective root zone (60 &#8211; 80 cm deep) fluctuates between 50 to 150 mm. These soils are at high risk of nutrient leaching, acidification and surface siltation because of the low clay and humus content of the topsoil.
Due to the soil&#8217;s low water-holding capacity, the crop yields at the Thyrow Field Station show great fluctuations dependent on weather conditions. The climatic water balance during the growing period is negative and the overall low water availability at this location limits the crop yields. Mean annual temperature for the period 1991-2020 was measured to be 9.7&#176;C, with annual precipitation 533 mm. Annual crop yields are particularly negatively affected by low precipitation from April to June.
The two areas that are managed by the research station are separated by the Thyrower Dorfstra&#223;e (Landesstra&#223;e 795). The main experimental area, where the long-term experiments are conducted, is located on the farm (Hof) side, along with two other trials for the implementation of field experiments. Northwest of the Landesstra&#223;e there is another experimental area (Schlag 3), where other experiments are conducted to answer questions about differing agricultural systems, soil management, cultivar suitability, and fertilization.

Soil classes according to German Soil Taxation: 	S4D, Sl5D, Sl4D
Soil textural class: 	silty sand
Mean annual temperature: 9.7&#176;C (1991-2020) / 9.2 &#176;C (1981-2010) / 8.9&#176; C (1971-2000)
Mean annual precipitation: 533 mm (1991-2020) / 510 mm (1981-2010) / 495 mm (1971-2000)
The geodata of the entire premises (Thyrower Hof and Schlag 3) were created with the help of aerial imagery and thus do not necessarily reflect official property borders.

This geodata file contains the overall grounds of the research Station Thyrow.

Related datasets are listed in the metadata element 'Related Identifier'.
Dataset version 1.0</gco:CharacterString><gmd:PT_FreeText><gmd:textGroup><gmd:LocalisedCharacterString locale="ger">Der Standort Thyrow der Lehr- und Forschungsstation Pflanzenbauwissenschaften ist eine Serviceeinrichtung des Albrecht Daniel Thaer-Instituts f&#252;r Agrar- und Gartenbauwissenschaften der Humboldt-Universit&#228;t zu Berlin. Gegr&#252;ndet im Jahr 1936 von Prof. Kurt Optiz liegt dieser Versuchsstandort ca. 30 Kilometers s&#252;dlich von Berlin. Der Standort stellt typische landwirtschaftliche Bedingungen der Jungmor&#228;nenlandschaften dar und ist im Boden-Klima-Raum der trocken-warmen diluvialen B&#246;den des Ostdeutschen Tieflands verortet. In diesem Raum kommen Bodenzahlen von weniger als 30 h&#228;ufig vor.

Thyrow liegt am s&#252;dlichen Rand des Teltows, einer weichselzeitlichen Grundmor&#228;nenplatte. Das Gel&#228;nde ist mit einer Hangneigung 2 % &#252;berwiegend flach und liegt ca. 42 m &#252;ber dem Meeresspiegel. Die Bodenform Fahlerde-Braunerde aus Sand &#252;ber tiefem Lehm herrscht an diesem Standort vor. Typisch f&#252;r Grundmor&#228;nen schwankt die Grenze zwischen Sand und Lehm sehr stark (60 cm bis 200 cm). Dies f&#252;hrt zu kleinr&#228;umigen Unterschieden im Wasser- und N&#228;hrstoffhaushalt im Unterboden. Die nutzbare Feldkapazit&#228;t im effektiven Wurzelraum (60 &#8211; 80 cm Tiefe) kann zwischen 50 und 150 mm variieren. Aufgrund niedrige Ton- und Humusgehalte im Oberboden sind diese B&#246;den stark durch N&#228;hrstoffauswaschung, Versauerung und Verschl&#228;mmung gef&#228;hrdet.

Wegen des geringen Wasserspeicherverm&#246;gens des Bodens ist die Ertragsvariabilit&#228;t am Standort Thyrow stark witterungsabh&#228;ngig. In der Vegetationszeit ist die klimatische Wasserbilanz negativ und der Ertrag wird durch die geringe Wasserverf&#252;gbarkeit begrenzt. Die mittlere Jahrestemperatur f&#252;r den Zeitraum 1991-2020 liegt bei 9,7 &#176;C, die mittlere Niederschlagsmenge im gleichen Zeitraum bei 533 mm. Die Ertr&#228;ge werden insbesondere durch geringe Niederschl&#228;ge in den Monaten April bis Juni negativ beeinflusst.

Am Standort Thyrow werden zwei Fl&#228;chen bewirtschaftet, die durch die Thyrower Dorfstra&#223;e (Landesstra&#223;e L795) getrennt sind. An das Hofgrundst&#252;ck schlie&#223;t die Hauptversuchsfl&#228;che an, auf dieser sind die Thyrower Dauerfeldversuche angelegt worden und es stehen zwei weitere Schl&#228;ge f&#252;r die Durchf&#252;hrung von Feldversuchen zur Verf&#252;gung. Nordwestlich der Landesstra&#223;e befindet sich eine weitere Versuchsfl&#228;che (Schlag 3), auf der Langzeitversuche und Projektversuche zu Fragen differenzierter Agrarsysteme, Bodenbearbeitung, Sorteneignung und D&#252;ngung durchgef&#252;hrt werden. 

Bodensch&#228;tzung: 	S4D, Sl5D, Sl4D
Bodenart: 	schluffiger Sand
Jahresmitteltemperatur: 9,7&#176;C (1991-2020) / 9,2 &#176;C (1981-2010) / 8,9&#176; C (1971-2000)
Jahresniederschlag: 533 mm (1991-2020) / 510 mm (1981-2010) / 495 mm (1971-2000)
Die Geodaten des Gel&#228;ndes (Thyrower Hof und Schlag 3) sind aus Luftbildern erstellt wurden und reflektieren keine amtlichen Grenzen.
 Dieser Geodatensatz enth&#228;lt die Gesamtfl&#228;che der Forschungsstation Thyrow.

Zugeh&#246;rige Datens&#228;tze sind unter Related Identifier gelistet.
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2026-02-06 Data imported to database
2026-02-06 Metadata xml for dataset created
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