Now showing items 1-10 of 10
Chemical differences in soil organic matter fractions determined by diffuse-reflectance mid-infrared spectroscopy
Author(s):Collins, Harold P.; Reeves, James B.; Calderón, Francisco J.; Paul, Eldor A.
We performed mid-infrared (MidIR) spectral interpretation of fractionated fresh and incubated soils to determine changes in soil organic matter (SOM) chemistry during incubation. Soils from four sites and three depths were ...
Carbon and nitrogen mineralization kinetics in soil previously amended with sewage sludge
Author(s):Paul, Eldor A.; Boyle, Michael
Microbial mineralization rates of organic carbon (C) and nitrogen (N) were determined on the same sludge-amended and nonamended soil samples. The purpose of this integrated approach was to high-light the long-term dynamics ...
Diffuse-reflectance Fourier-transform mid-infrared spectroscopy as a method of characterizing changes in soil organic matter
Author(s):Haddix, Michelle; Margrini-Bair, Kimberly; Conant, Richard; Calderón, Francisco; Paul, Eldor A.
Diffuse-reflectance Fourier-transform mid-infrared spectroscopy (MidIR) can identify the presence of important organic functional groups in soil organic matter (SOM); however, spectral interpretation needs to be validated ...
Does the acid hydrolysis–incubation method measure meaningful soil organic carbon pools?
Author(s):Conant, Richard T.; Morris, Sherri J.; Paul, Eldor A.; Plante, Alain F.
The literature was reviewed and analyzed to determine the feasibility of using a combination of acid hydrolysis and CO2–C release during long-term incubation to determine soil organic carbon (SOC) pool sizes and mean ...
Carbon isotope ratios of Great Plains soils and in wheat-fallow systems
Author(s):Peterson, G. A.; Lyon, D.; Halvorson, A. D.; Leavitt, S. W.; Paul, Eldor A.; Follett, R. F.
The purposes of this study were to improve knowledge of regional vegetation patterns of C3 and C4 plants in the North American Great Plains and to use δ13C methodology and long-term research sites to determine contributions ...
Role of soil characteristics on temperature sensitivity of soil organic matter, The
Author(s):Paul, Eldor A.; Morris, Sherri J.; Drijber, Rhae A.; Margrini-Bair, Kim; Steinweg, J. Megan; Six, Johan; Conant, Richard T.; Plante, Alain F.; Haddix, Michelle L.
The uncertainty associated with how projected climate change will affect global C cycling could have a large impact on predictions of soil C stocks. The purpose of our study was to determine how various soil decomposition ...
Interpretation of soil carbon and nitrogen dynamics in agricultural and afforested soils
Author(s):Gregorich, E. G.; Paustian, K.; Six, J.; Morris, S. J.; Paul, Eldor A.
Interpretation of soil organic C (SOC) dynamics depends heavily on analytical methods and management systems studied. Comparison of data from long-term corn (Zea mays)-plot soils in Eastern North America showed mean residence ...
Fractionation and long-term laboratory incubation to measure soil organic matter dynamics
Author(s):Paul, Eldor A.; Wright, S.; Collins, H. P.; Haile-Mariam, S.
Soil organic matter (SOM) in agricultural soils comprises a significant part of the global terrestrial C pool. It has often been characterized by utilizing a combination of chemical dispersion of the soil followed by ...
Does physical protection of soil organic matter attenuate temperature sensitivity?
Author(s):Conant, Richard T.; Paul, Eldor A.; Six, Johan; Plante, Alain F.
Global climate change may induce accelerated soil organic matter (SOM) decomposition through increased soil temperature, and thus impact the C balance in soils. We hypothesized that compartmentalization of substrates and ...
Radiocarbon dating for determination of soil organic matter pool sizes and dynamics
Author(s):Lyon, D. J.; Peterson, G. A.; Halvorson, A.; Leavitt, S. W.; Follett, R. F.; Paul, Eldor A.
The size and turnover rate of the resistant soil organic matter (SOM) fractions were measured by 14C dating and 13C/12C measurements. This involved soils archived in 1948, and recent samples, from a series of long-term ...