Permanganate Oxidizable Carbon Reflects a Processed Soil Fraction that is Sensitive to Management

Author: Steve Culman et al
Date:  March–April 2012
Abstract: Permanganate oxidizable C (POXC; i.e., active C) is a relatively new method that can quantify labile soil C rapidly and inexpensively. Despite limited reports of positive correlations with particulate organic C (POC), microbial biomass C (MBC), and other soil C fractions, little is known about what soil fractions POXC most closely re!ects. We measured POXC across a wide range of soil types, ecosystems, and geographic areas (12 studies, 53 total sites, n = 1379) to: (i) determine the relationship between POXC and POC, MBC and soil organic C (SOC) fractions, and (ii) determine the relative sensitivity of POXC as a labile soil C metric across a range of environmental and management conditions.
Source: SSSAJ: Volume 76: Number 2

From Jude Maul

I am currently attending an intensive eExtension writing group in Annapolis, MD.  We were each invited to submit at least one extension write-up on grain production.  I have started writing a short article “Introduction and Current Research in Perennial Wheat”.  If anyone has references, self-references (with a little blurb about the work you are citing), preliminary data and any-other information you would like to contribute.  If you contribute to writing or editing then you can be listed as an author.  The article will eventually be published on eXtension ( and can considered as an extension publication.  Please send me any information that may be useful for this write-up, to
Jude Maul
Research Ecologist
Sustainable Agriculture Systems Lab
Building 001, rm 140
Beltsville, Maryland 20770

Perennial Wheatgrass at Beltsville Agricultural Research Center

Author: Jude Maul
Affiliation: USDA-ARS – Sustainable Agriculture Systems Lab
Abstract: This presentation illustrates research conducted on perennial grasses in the Maryland area – specifically looking to answer if soybeans can be used as a mid-summer weed control and source of fertility (nitrogen) in fall for perennial grains.