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Natural nitrogen-15 abundance of soil and plant samples
Author(s):Rennie, D. A.; Johns, L. E.; Paul, E. A.
Date Issued:1976-02
Format:born digital; articles
Nitrogen isotope analysis of total soil N and soil-derived nitrate for nine selected Chernozemic and Luvisolic Ap horizons showed mean δa15N values based on atmospheric abundance of 8.8. Luvisolic soils were characterized ...
Use of tracers and computer simulation techniques to assess mineralization and immobilization of soil nitrogen
Author(s):Paul, Eldor A.; Juma, N. G.
Date Issued:1981
Format:born digital; articles
The objectives of this investigation were to develop and test concepts of microbial growtth and decay in soil and to study the mineralization and inmobilization of soil N using tracer and computer simulation techniques.
Turnover of microbial biomass, plant residues and soil humic constituents under field conditions
Author(s):McGill, W. B.; Paul, Eldor A.
Date Issued:1977
Format:born digital; articles
The effects of soil texture and climatic conditions on turnover rates of plant residues were measured under field conditions. Carbon-14- and 15N-labelled straw made it possible to follow degradation rates of the original ...
Organic C dynamics in grassland soils. 2. Model validation and simulation of the long-term effects of cultivation and rainfall erosion
Author(s):Paul, E. A.; Voroney, R. P.; Van Veen, J. A.
Date Issued:1981-05
Format:born digital; articles
The amounts of organic matter in native prairie and in an adjacent cultivated field were compared with the output from a simulation model describing organic matter dynamics. The effects of past and possible future soil ...
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.
Date Issued:1997-07
Format:born digital; articles
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 ...
Fate of legume and fertilizer nitrogen-15 in a long-term cropping systems experiment
Author(s):Janke, Rhonda R.; Peters, Steven E.; Paul, Eldor A.; Hesterman, Oran B.; Harris, Glendon H.
Date Issued:1994-09
Format:born digital; articles
Relying more on biological N2 fixation has been suggested as a way to meet one of the major challenges of agricultural sustainability. A 15N study was conducted to compare the fate of applied legume and fertilizer N in a ...