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      <r:Title>
        <r:String xml:lang="sv">Fördelning av organiskt kol och kväve i markprofilen (0-60 cm) i fyra långliggande försök i Sverige</r:String>
        <r:String xml:lang="en">Distribution of soil organic carbon and nitrogen concentrations in the soil profiles (0-60 cm) at four long-term  experiment sites in Sweden</r:String>
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          <r:String xml:lang="sv">Sveriges lantbruksuniversitet</r:String>
          <r:String xml:lang="en">Swedish University of Agricultural Sciences</r:String>
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      </r:Publisher>
      <r:Publisher>
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          <r:String xml:lang="sv">Sveriges lantbruksuniversitet</r:String>
          <r:String xml:lang="en">Swedish University of Agricultural Sciences</r:String>
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        <r:SimpleDate>2025-11-06</r:SimpleDate>
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        <r:IdentifierContent>10.5878/hvp1-6z71</r:IdentifierContent>
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      <r:Content xml:lang="sv">Denna datamängd presenterar resultaten från en markprovtagningskampanj som genomfördes på fyra platser i Sverige som ingår i försöksserien Humusbalansförsöken R3-0020 och R-0021. Serien etablerades mellan 1971 och 1980 i Röbäcksdalen, Säby, Lanna och Lönnstorp, längs en klimatgradient. Studien hade som forskningsmål att undersöka effekten av odlingssystem och kvävegödsling på markens organiska förråd av kol och kväve. Huvudresultaten från denna fältkampanj är kol- och kvävehalter på olika markdjup längs markprofilen. Filen innehåller 560 rader (observationer) och 10 kolumner (variabler).</r:Content>
      <r:Content xml:lang="en">This dataset presents the results of a soil sampling field campaign conducted at four sites in Sweden, which constitute the humus balance experimental series. The humus balance experiments include the R3-0020, which contains  data for soil organic carbon and nitrogen in cereal cropping systems, and the R3-0021series, which contains data for soil organic carbon and nitrogen in a ley rotation system and 
This series was established between 1971 and 1980 at Röbäcksdalen, Säby, Lanna, and Lönnstorp, along a climate gradient. The research objective of the study was to study the effect of cropping systems and nitrogen fertilization on soil organic carbon (SOC) and nitrogen (SON) stocks. The main outputs of this field campaign are SOC and N content at different soil depths along the profile. The file contains 560 rows (observations) and 10 columns (variables).</r:Content>
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        <r:Subject xml:lang="sv" controlledVocabularyID="10502" controlledVocabularyName="Standard för svensk indelning av forskningsämnen 2025">Miljövetenskap</r:Subject>
        <r:Subject xml:lang="en" controlledVocabularyID="10611" controlledVocabularyName="Standard för svensk indelning av forskningsämnen 2025">Ecology</r:Subject>
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        <r:Subject xml:lang="en" controlledVocabularyID="40101" controlledVocabularyName="Standard för svensk indelning av forskningsämnen 2025">Agricultural Science</r:Subject>
        <r:Subject xml:lang="sv" controlledVocabularyID="40101" controlledVocabularyName="Standard för svensk indelning av forskningsämnen 2025">Jordbruksvetenskap</r:Subject>
        <r:Subject xml:lang="en" controlledVocabularyID="40106" controlledVocabularyName="Standard för svensk indelning av forskningsämnen 2025">Soil Science</r:Subject>
        <r:Subject xml:lang="sv" controlledVocabularyID="40106" controlledVocabularyName="Standard för svensk indelning av forskningsämnen 2025">Markvetenskap</r:Subject>
        <r:Subject xml:lang="en" controlledVocabularyID="farming" controlledVocabularyName="INSPIRE topic categories">Farming</r:Subject>
        <r:Subject xml:lang="sv" controlledVocabularyID="farming" controlledVocabularyName="INSPIRE topic categories">Areella näringar</r:Subject>
        <r:Subject xml:lang="en" controlledVocabularyID="environment" controlledVocabularyName="INSPIRE topic categories">Environment</r:Subject>
        <r:Subject xml:lang="sv" controlledVocabularyID="environment" controlledVocabularyName="INSPIRE topic categories">Miljö</r:Subject>
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        <r:Keyword xml:lang="en" controlledVocabularyID="20014" controlledVocabularyName="EnvThes">nitrogen fertilisation</r:Keyword>
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        <r:Keyword xml:lang="en" controlledVocabularyID="22259" controlledVocabularyName="EnvThes">soil nitrogen</r:Keyword>
        <r:Keyword xml:lang="en" controlledVocabularyID="lu" controlledVocabularyName="INSPIRE Spatial Data Themes">Land use</r:Keyword>
        <r:Keyword xml:lang="sv" controlledVocabularyID="lu" controlledVocabularyName="INSPIRE Spatial Data Themes">Markanvändning</r:Keyword>
        <r:Keyword xml:lang="en" controlledVocabularyID="so" controlledVocabularyName="INSPIRE Spatial Data Themes">Soil</r:Keyword>
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        <r:Keyword xml:lang="en" controlledVocabularyID="c_16379" controlledVocabularyName="AGROVOC">plant nutrition</r:Keyword>
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          <r:Content xml:lang="en">The humus balance long-term field experiments are located at four sites, Röbäcksdalen, Säby, Lanna, and Lönnstorp, that span eight degrees of latitude in Sweden.</r:Content>
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