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  Research Task 1 Projects
 

The overarching goal for Task 1 is to develop a basic understanding of biophysical processes that control soil carbon dynamics and GHG emissions in agricultural soils of the U.S.


Subtasks:
  1. Task 1, Subtask 1: Primary production

    The overall goal of Subtask 1 is to elucidate mechanisms associated with increasing plant carbon inputs that enhance soil carbon sequestration and understand the influence of biophysical factors controlling these carbon inputs.

  2. Task 1, Subtask 2: Soil Aggregation, Organic Chemistry, and Microbial Community Composition, Divers

    The primary goal of Subtask 2 is to elucidate the biological, chemical, and physical mechanisms controlling the long-term storage of carbon in agricultural soils.

  3. Task 1, Subtask 3: Greenhouse gas fluxes and dissolved carbon export

    Subtask 3 research will include an investigation of carbon exports via leaching in relation to the overall soil carbon budget, and how such exports could be affected by management of soil water status and limestone amendments.


Research:
 

Enhancement of Soil Carbon Sequestration

Research at PNNL has focused on understanding the fundamental process by which humus is created and identifying practical management options to enhance the rate of humification in agricultural soils.


Influence of No-Till on SOM, Biota, and Aggregation in Temperate and Tropical Soils

In a recent review, Six et al. (2002) present a general comparison of soil organic matter stabilization mechanisms in tropical versus temperate soils.


Soil C Saturation: Determining Rates and Limits of Carbon Sequestration

Increasing soil C through changes in land use and management is a low cost and environmentally beneficial method of sequestering substantial amounts of atmospheric CO2.


Integrating Soil Physics, Soil Chemistry and Soil Biology to Understand C Sequestration

As atmospheric levels of CO2 increase steadily, the ability of terrestrial systems to assimilate this burden of CO2 is critically linked to the amount of C sequestered in soils and to the rate that biomass is converted to and sequestered as soil C.


Controls on Soil Organic Matter Dynamics. A Cross Site Comparison

The dynamics of soil organic matter (SOM) is a major factor in soil fertility and determines whether soils sequester or lose carbon under different management practices.


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CASMGS is a consortium of nine universities and one National Laboratory assembled to investigate the
potential of agricultural soils to mitigate greenhouse gases. Click here for background information.