Soil solution chemistry in Detrital Input and Removal Treatments (DIRT) from the Andrews Experimental Forest, 1999-2011

  • Creator(s): Kate Lajtha
  • PI(s): Kate Lajtha
  • Originator(s): Kate Lajtha
  • Other researcher(s): Derek Pierson, Phillip Sollins, Hayley Peter-Contesse, April Strid, Fox Sparky Peterson, Jennifer Dawn Wig, Kim Townsend
  • Dates of data preparation: Dec 1 1999 - Apr 15 2011
  • Data collection status: Study collection is completed and no new collection is planned
  • Data access: Online
  • Last update: Jan 3 2013 (Version 2)
<Citation>     <Acknowledgement>     <Disclaimer>    
Lajtha, K. 2013. Soil solution chemistry in Detrital Input and Removal Treatments (DIRT) from the Andrews Experimental Forest, 1999-2011. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2023-12-11.
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
The Detrital Input and Removal Treatment (DIRT) Project was established to assess how rates and sources of plant litter inputs influence accumulations or losses of organic matter in forest soils. DIRT employs chronic additions and exclusions of aboveground litter inputs and exclusion of root ingrowth to permanent plots at eight forested and two shrub/grass sites in the northern hemisphere to investigate how soil organic matter (SOM) dynamics are influenced by plant detrital inputs across ecosystem and soil types. The long-term DIRT study at the H.J. Andrews Experimental Forest was established in an old-growth forest stand on the valley floor and aims to address how detrital quality and quantity control soil organic matter accumulation and stabilization. The DIRT plots consist of treatments that double leaf litter, double woody debris inputs, exclude aboveground litter inputs, remove root inputs via trenching, or remove all organic matter inputs. We measured changes in soil solution chemistry with depth, and conducted long-term incubations of bulk soils from different treatments in order to elucidate effects of detrital inputs on the relative amounts and lability of different soil C pools. These data include various properties of the DIRT plots obtained during re-measurements at various intervals. C and N concentrations and content in soil, CO2 efflux, and soil solution chemistry are measured from bulk samples to 1 m depth, field respiration measurements, and lysimeters at 2 depths, respectively, and assessed at Oregon State University.

Study Description Study Site Map Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Density Fractionation; carbon and nitrogren content by fraction (Apr 12 1999 - Nov 26 1999)METADATADATA
2Soil sample wet and dry weights (Apr 12 1999 - Nov 26 1999)METADATADATA
3Density Fractionation; carbon and nitrogren content averages by fraction across plots (Apr 12 1999 - Nov 26 1999)METADATADATA
4Content of organic carbon and nitrogen in soil water from soil lysimeters (Apr 12 1999 - Apr 15 2011)METADATADATA
5Enzyme concentrations by treatment across plots (Jun 6 2006 - Oct 10 2010)METADATADATA

 The Detrital Input and Removal Experiment (DIRT) network website - a link to the DIRT website
 HJA DIRT plots - Spatial representation of the DIRT plots with numbering from John Dixon

 Lajtha, Kate, Bowden, Richard D., Crow, Susan, Fekete, Istvan, Kotroczo, Zsolt, Plante, Alain, Simpson, Myrna J., Nadelhoffer, Knute J. 2018, The detrital input and removal treatment (DIRT) network: Insights into soil carbon stabilization (Pub. No: 5039)
 Strid, April, Lee, Baek Soo, Lajtha, Kate 2016, Homogenization of detrital leachate in an old-growth coniferous forest, OR: DOC fluorescence signatures in soils undergoing long-term litter manipulations (Pub. No: 4961)
 Yarwood, Stephanie, Brewer, Elizabeth, Yarwood, Rockie, Lajtha, Kate, Myrold, David. 2013, Soil Microbe Active Community Composition and Capability of Responding to Litter Addition after 12 Years of No Inputs (Pub. No: 4806)
 Crow, Susan E., Swanston, Christopher W., Lajtha, Kate, Brooks, J. Renée, Keirstead, Heath 2007, Density fractionation of forest soils: methodological questions and interpretation of incubation results and turnover time in an ecosystem context (Pub. No: 4332)
 Crow, Susan E., Sulzman, Elizabeth W., Rugh, William D., Bowden, Richard D., Lajtha, Kate 2006, Isotopic analysis of respired CO2 during decomposition of separated soil organic matter pools (Pub. No: 3883)
 Sollins, Phillip, Swanston, Christopher, Kleber, Markus, Filley, Timothy, Kramer, Marc, Crow, Susan, Caldwell, Bruce A., Lajtha, Kate, Bowden, Richard 2006, Organic C and N stabilization in a forest soil: evidence from sequential density fractionation (Pub. No: 4183)
 Brant, Justin B., Sulzman, Elizabeth W., Myrold, David D. 2006, Microbial community utilization of added carbon substrates in response to long-term carbon input manipulation (Pub. No: 4195)
 Brant, Justin B., Myrold, David D., Sulzman, Elizabeth W. 2006, Root controls on soil microbial community structure in forest soils (Pub. No: 4216)
 Crow, Susan E. 2006, Characteristics of soil organic matter in two forest soils (Pub. No: 4728)
 Sulzman, Elizabeth W., Brant, Justin B., Bowden, Richard D., Lajtha, Kate 2005, Contribution of aboveground litter, belowground litter, and rhizosphere respiration to total soil CO2 efflux in an old growth coniferous forest (Pub. No: 3522)
 Lajtha, K., Crow, S. E., Yano, Y., Kaushal, S. S., Sulzman, E., Sollins, P., Spears, J. D. H. 2005, Detrital controls on soil solution N and dissolved organic matter in soils: a field experiment (Pub. No: 3524)
 Holub, Scott M., Lajtha, Kate, Spears, Julie D. H., Tóth, János A., Crow, Susan E., Caldwell, Bruce A., Papp, Mária, Nagy, Péter T. 2005, Organic matter manipulations have little effect on gross and net nitrogen transformations in two temperate forest mineral soils in the USA and central Europe (Pub. No: 3849)
 Brant, Justin 2005, Controls of microbial community composition and function in forest soils (Pub. No: 3922)
 Yano, Yuriko, Lajtha, Kate, Sollins, Phillip, Caldwell, Bruce A. 2004, Chemical and seasonal controls on the dynamics of dissolved organic matter in a coniferous old-growth stand in the Pacific Northwest, USA (Pub. No: 3671)
 Spears, J. D. H., Lajtha, K. 2004, The imprint of coarse woody debris on soil chemistry in the western Oregon Cascades (Pub. No: 3834)
 Dixon, John J. 2003, Applying GIS to soil-geomorphic landscape mapping in the Lookout Creek Valley, western Cascades, Oregon (Pub. No: 3850)