Virginia Tech
    • Log in
    View Item 
    •   VTechWorks Home
    • College of Agriculture and Life Sciences (CALS)
    • Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase
    • View Item
    •   VTechWorks Home
    • College of Agriculture and Life Sciences (CALS)
    • Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Assessing and managing soil quality for sustainable agricultural system

    Thumbnail
    View/Open
    3687_poster_Philippines_renewluk.ppt (1.659Mb)
    Downloads: 52
    Date
    2008
    Author
    Motavalli, Peter P.
    Jintaridth, B.
    Lehmann, J.
    Goyne, K. W.
    Gilles, Jere
    Metadata
    Show full item record
    Abstract
    Soil quality assessment is a process by which soil resources are evaluated on the basis of soil function. Soil organic matter (SOM) is one of the most widely knowledge indicators of soil quality(Gregorich et al., 1994). In general, SOC varies across landscapes, soil types and climatic zones. It is characterized by high levels of C in recalcitrant or humified forms and small changes in SOC resulting from changes in soil management are difficult to measure. An approach to evaluate the impact of agricultural management of SOM dynamics is to separate SOM into pools which will depend on differences in decomposition rates (Wander et al., 1994). In two-pool exponential decomposition models, the pool with the smallest size and most rapid turnover is termed labile and the larger pool with slow turnover is termed recalcitrant. The lability of SOM is defined as the ease and speed with which it is decomposed by microbes and depends on both chemical recalcitrance and physical protection from microbes. Changes in labile fractions of SOC provide an early indication of soil degradation or improvement in response to management practices (Islam and Weil,2000). In this research, soil samples will be collected from representative degraded and non- degraded soils at ongoing SANREM field sites, establish in-field and laboratory capacity to test soil quality, and develop analytical methodologies for the spectroscopic-based procedures. Collaboration with CGIAR system (i.e., ICRAF), USDA-ARS and USDA-NRCS are also important goals of this project due to the ongoing efforts and resources being invested at these institutions in developing low-cost methods for soil quality evaluation.
    URI
    http://hdl.handle.net/10919/68519
    Collections
    • Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase [3994]

    If you believe that any material in VTechWorks should be removed, please see our policy and procedure for Requesting that Material be Amended or Removed. All takedown requests will be promptly acknowledged and investigated.

    Virginia Tech | University Libraries | Contact Us
     

     

    VTechWorks

    AboutPoliciesHelp

    Browse

    All of VTechWorksCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Log inRegister

    Statistics

    View Usage Statistics

    If you believe that any material in VTechWorks should be removed, please see our policy and procedure for Requesting that Material be Amended or Removed. All takedown requests will be promptly acknowledged and investigated.

    Virginia Tech | University Libraries | Contact Us